336 



BRACHIOPODA. 



[atr. 



scar ; dorsal valve convex, with or with- 

 out a mesial fold ; hinge plate divided 

 in the middle with a tooth-like plate on 

 each side, the crura originating outside 

 of these close to the dental sockets, and 

 outside of the latter, close to the shell 

 margins, there is a crenulated fold,which 

 occupied the groove at the base of the 

 tooth ; the spires originating from the 

 crura form two hollow cones, directed 

 into the cavity of the dorsal valve, their 

 adjacent sides being flattened and apices 

 brought close together near the center 

 of the bottom of the cavity ; the pro- 

 cesses at the base of the crura are di- 

 rected into the cavity of the dorsal 

 valve, and unite to form a loop ; surface 

 smooth, striate, or costate; structure 

 fibrous. Type A. reticularis. 



aculiplicata, see Leptocoelia acutiplicata. 



acutirostra, see Rhynchonella acutirostra. 



sequiradiata, Conrad, 1842, Jour. Acad. 

 Nat. Sci., vol. 8, p. 266, Low. Held. Gr. 



sequiradiaia, see Rhynchonella n<|iiira- 

 diata. 



affinis, syn. for Atrypa reticularis. 



altilix, see Khynchonella altilis. 



ambigua, see Cainarella ambigua. 



aprinis, see Rhynchonella aprini.-. 



arata, see Pentamerella arata. 



aspera, Schlotheim, 1813, (Terebratula 

 aspera,) Petrefaktenkunde, p. 263, Ham. 

 and Chemung Gre. 



aspera var. occidentalis, Hall, 1868, Geo. 

 Sep. Iowa, vol. 1, pt. 2, p. 515, Ham. Gr. 



bidens, see Rhynchonella bidens. 



hixiilcata, see Camarella bisulcata. 



borealis, Schlotheim, as identified by 

 d'Archiac & Verneuil. Not American. 



brevirottirk, as identified by Hall, Pal. 

 N. Y., vol. 2, p. 278. See Pentamems 

 l>iwirostri8 and Anastrophia verneiiili. 



camura, see Trematospira camura. 



capax, see Rhynchonella capax. 



camdea, as identified by d'Archiac tt 

 Verneuil. Not American. 



chemangensis, Conrad, 1842, Jour. Acad. 

 Nat. Sci., vol. 8, p. 265, Chemung < ir. 



cirrnhis see Camarella circulus. 



concinna, see Nucleospira concinna. 



comis, see Pentamerus comis. 



concentrica, syn. for Athyris spiriferoides. 



congesta, see Triplesia congesta. 



congregata, see Stenochisma congregatum. 



contracta, see Stenochisma contractual. 



coraUifera, see Eichwaldia corallifera. 



crassirostra, Hall,' 1852, Pal. N. Y., vol. 2, 

 p. 269, Niagara < i r. 



crenulala see Terebratula crenulata. 



cuboides, as identified by Hall and others. 

 See Rhynchonella venustula. 



cuneata, see Rhynchonella cuneata. 



cuspidata, see Triplesia cuspidata. 



cylindrica, see Meristella cylindrica. 



deflecta, Hall, 1847, Pal. N. Y., vol. 1, p. 

 140, Trenton Gr. 



dentata, see Rhynchonella dentata. 



disparilis, see Coelospira disparilis. 



dubia, see Rhynchonella dubia. 



dumosa, Hall, 1843, Geo. Rep., 4th Dist 



N. Y., p. 272, Chemung (ir. 

 duplicata, see Stenochisma duplicatum. 

 eUmgata, syn. for Rensseheria ovoides. 

 emacerata, see Rhynchonella emacerata. 

 exigua, Hall, 1847, Pal. N. Y., vol. 1, p. 



141, Trenton Gr. 

 eximia, see Stenochisma eximium. 

 exlans, see Triplesia extans. 

 flabella, syn. for Leptocoelia hemispheric*. 

 flabellites, see Leptocoelia flabellib 

 guli (ita, see Pentameru8 galeatus. 

 gibbosa, Hall, 1852, Pal. N. Y., vol. 2, p. 



79, Clinton Gr. 

 globuliformis, see Leiorhynchus globuli- 



forme. 

 hemiplicata, see Camarella hemiplicala. 

 hemispheric^, see Leptocoelia hemispheric*. 

 hirsuta, see Trematospira hirsute. 

 hystrix, Hall, 1843, Geo. Rep. 1th Dist. 



N. Y., p. 272, and Pal. N.Y., vol. 4, p. 838, 



Chemung Gr. 

 impressa, Hall, 1857, 10th Rep. N. Y. St. 



Mus. Nat. Hist., p. 122, and I'al. N. V . 



vol. 4, p. 315, Schoharie (nit. 



FlO. ML— Atrypa reticularis, a, Donal valve; b, 

 ventral valve; <•, anterior view 



impressa. Shaler. The name was pi 



cupiea. 

 increbeBcens, syn. for Rhynchonella capax. 

 inllata, Conrad, 1843, Geo. Rep. Sd Dist. 



"N. Y. Not defined, 

 intermedia, Hall, 1852, Pal. N. Y., vol. 2, 



p. 77, Clinton < ir. 

 interplicata, see Anastrophia interplicata. 

 Isevis, see Meristella la- vis. 

 lamellata, see Rhynchonella lamellata. 

 Utiootta, Phillips, 1841, (Terebratula lati- 



costa,) Pai Koss., Chemung Gr. This 



species is not clearly identified in 



America. 

 Untiformis, syn. for Atrypa reticularis. 

 Iimitari8, see Leiorhynchus limitare. 

 mansoni, Salter, 1852, (Rhynchonella 



mansoni,) .Sutherland's Jour., vol. 2, p. 



ccxxi, Devonian, 

 marginalis, (?) Dalman, 1827, (Terebratula 



marginalis,) Vet. Acad. Handl., p. 143, 



Niagara Gr. 

 medialis, see Eatonia medialis. 

 memcostalii, see Leiorhynchus mesacostale. 

 modesta, see Zygospira modesta. 

 nasuta, see Meristella nasuta. 

 naviformis, see Athyris naviformis. 



