Thirty-five new genera are described, 27 of them based on new species. They
are classified by superfamily as follows: ENTELETACEA: Acosarina (A. dorsisulcata,
new species). DAVIDSONIACEA: Goniarina (G. pyelodes, new species), Tropidel-
asma (T. culmenatum, new species). CHONETACEA: Chonetinetes (C reversus,
new species), Micraphelia (M. scitula, new species), Rugaria (Chonetes hessensis
R. E. King), Sulcataria (Chonetina? rostrata Dunbar and Condra), Undulella
(U. undulata, new species). STROPHALOSIACEA: Acritosia {A. magna, new spec-
cies), Agelesia (Aulosteges triagonalis R. E. King). RICHTHOFENIACEA: Col-
lumatus (C. solitarius, new species), Cyclacantharia (C. kingorum, new species),
Her cose stria (H. cribrosa, new species), Hercosia (Richthofenia uddeni Bose),
Sestropoma (5. cribriferum, new species). PRODUCTACEA: Anemonaria (A. inflata,
new species), Dasysaria {D. undulata, new species), Oncosarina (O. spinicostata,
new species), Thamnosia (T. anterospinosa, new species). LYTTONIACEA: Petas-
maia (P. expansa, new species) . RHYNCHONELLACEA: Amphipella {A. arcaria,
new species), Bryorhynchus (Camarophoria? bisulcata Shumard), Divaricosta
{D. squarrosa, new species), Petasmatherus {P. opulus, new species), Phreno-
phoria (P. subcarinata, new species), Pontisia (P. stehlii, new species), Strigir-
hynchus (Rhynchonella? indentata Shumard), Tautosia (T. fastigiata, new
species). SPIRIFERACEA: Lepidospirifer (L. angulatus, new species). SPIRIFERINA-
CEA: Sarganostega {S. transversalis, new species), Xestotrema (Spirifera pulchra
Meek) . RETICULARIACEA: Anomaloria (A. anomala, new species), Astegosia {Squ-
amularia guadalupensis subquadrata Girty). DIELASMATACEA: Plectelasma (P.
kingi, new species). CRYPTONELLACEA: Texasia (T. elongata, new species).
The genus Cooperina Termier, Termier and Pajaud, based on material from
the Glass Mountains, Texas, was assigned by its authors to the Thecideidina.
Evidence is adduced here to show that it is classified more properly among the
Strophalosiacea of the Productidina and that it is unrelated to the thecideids.
Thirty-five new genera are described, 27 of them based on new species. They
are classified by superfamily as follows: ENTELETACEA: Acosarina (A. dorsisulcata,
new species). DAVIDSONIACEA: Goniarina (G. pyelodes, new species), Tropidel-
asma (T. culmenatum, new species). CHONETACEA: Chonetinetes (C reversus,
new species), Micraphelia (M. scitula, new species), Rugaria (Chonetes hessensis
R. E. King), Sulcataria (Chonetina? rostrata Dunbar and Condra), Undulella
(U. undulata, new species). STROPHALOSIACEA: Acritosia {A. magna, new spec-
cies), Agelesia (Aulosteges triagonalis R. E. King). RICHTHOFENIACEA: Col-
lumatus (C. solitarius, new species), Cyclacantharia (C. kingorum, new species),
Her cose stria (H. cribrosa, new species), Hercosia (Richthofenia uddeni Bose),
Sestropoma (5. cribriferum, new species). PRODUCTACEA: Anemonaria (A. inflata,
new species), Dasysaria {D. undulata, new species), Oncosarina (O. spinicostata,
new species), Thamnosia (T. anterospinosa, new species). LYTTONIACEA: Petas-
maia (P. expansa, new species) . RHYNCHONELLACEA: Amphipella {A. arcaria,
new species), Bryorhynchus (Camarophoria? bisulcata Shumard), Divaricosta
{D. squarrosa, new species), Petasmatherus {P. opulus, new species), Phreno-
phoria (P. subcarinata, new species), Pontisia (P. stehlii, new species), Strigir-
hynchus (Rhynchonella? indentata Shumard), Tautosia (T. fastigiata, new
species). SPIRIFERACEA: Lepidospirifer (L. angulatus, new species). SPIRIFERINA-
CEA: Sarganostega {S. transversalis, new species), Xestotrema (Spirifera pulchra
Meek) . RETICULARIACEA: Anomaloria (A. anomala, new species), Astegosia {Squ-
amularia guadalupensis subquadrata Girty). DIELASMATACEA: Plectelasma (P.
kingi, new species). CRYPTONELLACEA: Texasia (T. elongata, new species).
The genus Cooperina Termier, Termier and Pajaud, based on material from
the Glass Mountains, Texas, was assigned by its authors to the Thecideidina.
Evidence is adduced here to show that it is classified more properly among the
Strophalosiacea of the Productidina and that it is unrelated to the thecideids.
