190 



LAMELLIBRANCHIATA. 



rhombeus, Hall, 1843,(Cypricardia rhom- 



bea) Geo. Rep. 4th Dist. N. Y., Low. 



Carb. [Sig. rhomboidal.] 

 rotundatus, Hall, 1861, Geo. Rep. Wis., 



Trenton Gr. [Sig. rounded.] 

 rugosus, Billings, 1858, (Cyrtodonta ru 



gosa) Can. Nat. & Geo., vol. 3, Black 



Riv. Gr. [Sig. wrinkled.] 

 rugosa, see Goniophora rugosa. 

 saffordi, Hall, 1852, (Pakearca saffordi 



12th Reg. Rep., Low. Held. Gr. [Ety 



proper name.] 

 sectifrons, see Phthonia sectifrons. 

 sigmoideus, Billings, 1859, (Cyrtodonta 



sigmoidea) Can. Nat. & Geo., vol. 3, 



Black Riv. Gr. [Sig. like the Greek 



letter Sigma.] [toides. 



sinuata, syn. for Modiolopsis anodon- 

 spiniferus, Billings,1858, (Cyrtodonta spi- 



nifera) Can. Nat. & Geo., vol. 3, Black 



Riv. Gr. [Sig. bearing spines.] 

 sterlingensis, Meek & Worthen, 1866, 



(Dolabra sterlingensis) Proc. Acad. 



Nat. Sci. Phil.,Cin'tiGr. [Ety. proper 



name.] 

 subalatus. see Modiomorpha subalata. 

 subangulatus, Hall, 1847, (Edmondia 



subangulata) Pal. N. Y., vol. 1, Black 



Riv. and Trenton Gr. [Sig. somewhat 



angular.] 

 subcarinatus, Billings, 1858, (Cyrtodonta 



subcarinata) Can. Nat. & Geo., vol. 3, 



Black Riv. Gr. [Sig. somewhat cari- 



nated.] 

 subspatulatus, Hall, 1847, '(Modiolopsis 



subspatulata) Pal. N. Y., vol. 1, Black 



Riv. & Trenton Gr. [Sig. somewhat 



spatula-shaped.] 

 subtentus, Conrad, 1843, Geo. Rep. 3rd 



Dist. N. Y., Ham. Gr. [Sig. some- 

 what curved.] 

 subtruncatus, Hall, 1847, (Edmondia sub- 

 . truncata) Pal. N. Y., vol. 1., Black 



Riv. & Trenton Gr. [Sig. somewhat 



truncated.] 

 truncatus, see Sanguinolites truncatus. 

 ungulatus, Billings, 186 6, (Cyrtodonta 



ungulata) Catal. Sil. Foss. Antic, 



Hud. Riv. Gr. [Sig. having claws.] 

 ventricosus, Hall, 1847, (Edmondia ven- 



tricosa) Pal. N. Y., vol. 1, Trenton Gr. 



[Sig. bulging out,] 

 ventricosus, Hall, 1859, (Palrearca ventri- 



cosa) Pal. N.Y, vol. 3, Low. Held. Gr. 



This name was preoccupied. See 



Cypricardites islandicus. 

 vetustus, Hall, 1847, (Cardiomorpha ve- 



tusta) Pal. N. Y., vol. 1, Trenton Gr. 



[Sig. ancient,] 

 winchelli, Safford, 1869, (Cyrtodonta 



winchelli) Geo. Tenn., Trenton and 



Hud. Riv. Gr. [Ety. proper name.] 

 Cyrtodonta, syn. for Cypricardites. 



acutumbona, see Cypricardites acutum 



bonus. 

 anticostiensis, see C. anticostiensis. 

 brevimcula, see C. breviusculus. 

 canadensis, see C. canadensis. 



cordiformis, see C. cordiformis. 

 emma, see C. em ma. 

 ganti, see C. ganti. 

 harrietta, see C. harrietta. 

 hayniana, see C. haynanus. 

 hindi, see C. hindi. 

 huronensis, see C. huronensis. 

 insularis, see C. insularis. 

 leueothea, see C. leucothea. 

 normanensis, Safford. Not defined. 

 plebeia, see Cypricardites plebeius. 

 ponderosa, see C. ponderosus. 

 rugosa, see C. rugosus. 

 saffordi, see C. saffordi. 

 sigmoidea, see C. sigmoideus. 

 • spinifera, see C. spiniferusr 

 subcarinata, see C. subcarinatus. 

 ungulata, see C. ungulatus. 

 urinchelli, see C. winchelli. 

 Cytherodon, Hall. 1873, in 23rd Reg. Rep. 



N. Y. [Ety. Cythere, a genus of shells ; 



odous, a tooth.] 

 appressus, Conrad, (Nuculites appressa) 



1842, Jour. Acad. Nat, Sci., vol. 8, 



Ham. Gr. [Sig. pressed together.] 

 (?) placidus, Billings, 1874, Pal. Foss., 



vol. 2, Up. Sil. [Sig. smooth.] 

 socialis, Billings, 1874, Pal. Foss., vol. 2, 



Up. Sil. [Sig. social, clustered to- 

 gether.] 

 tumidus, Hall, 1870, (Schizodus tumidus) 



Prelim. Notice Lam. shells, etc., Up. 



Held. Gr. [Sig. swollen, tumid.] 

 Dexiobia, Winchell, 1863, Proc. Acad. Nat, 



Sci. [Ety. dexios, on the right side ; 



bia, strength.] 

 halli, Winchell, 1863, Proc. Acad. Nat. 



Sci., Chemung Gr. [Ety. proper 



name.] 

 ovata, Hall, 1858, (Cardiomorpha ovata) 



Geo. Rep. Iowa, Kinderhook Gr. 



[Sig. ovate.] 

 whitei, Winchell, 1863, Proc. Acad. Nat. 



Sci., Chemung Gr. [Ety. proper 



name.] 

 Dolabra, McCoy, 1844, Syn. Carb. Foss. 



Ireland. [Ety. dolabra, a mattock or 



pick axe.] 

 alpina, Hall, 1858, Geo. Rep. Iowa, Coal 



Meas. [Sig. alpine.] 

 carinata, see Cypricardites carinatus. 

 sterlingensis, see Cypricardites sterling- 

 ensis. 

 Dystactella, Hall, 1877, Pal. N. Y., vol. 5. 



[Ety. dijstaLios, hard to arrange.] 

 subnasuta,' Hall, 1877, Pal. N. Y., vol. 5, 



Up. Held. Gr. [Sig. somewhat nasute.] 

 Edmondia, DeKoninck, 1844, Desc. Anim. 



Foss., Carb. Belg. [Ety. proper name.] 

 anomala, Dawson, 1868, Acad. Geo., Carb. 



[Sig. irregular, out of order.] 

 aspen wallensis, Meek, 1871, Hayden's 



Rep. Sur. Wyoming, Coal Meas. [Ety. 



proper name.] 

 bicarinata, Winchell, 1863, Proc. Acad. 



Nat, Sci., Chemung Gr. [Sig. double- 

 keeled.] Prof. Hall regards this as a 



syn. for Sanguinolites rigidus. 



