246 



rinio anodontoides, Lea, Syn. 42 225 



apiculatus, Oct. 1829, N, H. D. ii. 309 ; Am. Con. April, 1834, 



vi, pi. 32, Syn. 48 20T, 131, 225 



arcceformis, Lea, Syn. 52, v. U. nexus 225 



asper, Lea, Syn. 48, v. U. apiculatus 225 



nsperrimus, Lea, Syn. 29, v. U. quadrulus, Eaf 224 



ater, Lea, Syn. 46, t. U. lugubris 225 



aira, Desh. Syn. 46, 225 



brevidens^ h^a,, Syn. 17 224 



hullatus, Raf. Syn. 30 224 



ealceolus, Lea, Syn. Alas. 1 225 



camptoden, Aug. 1832, Am. Con. v. pi. 42 196 



capax, Green, var. Syn. 11 224 



carduim, Raf. Syn. 11 224 



caridiacea, Say of Guerin, Syn. 38 224 



rarinatus, Barnes, Syn. 3 223 



cariosus, 1816, 1818,1819. N. E. 1, 2, 3 eds. pL 3, fig. 2, 



Syn. 2 51, 223 



castaneus? Lea, Syn. 7 223 



cicatricosus, Sept. 23, 1829, N. H. D. ii. 292, 1840, Desc. 5, 



Syn. 54 131, 225 



r.irculus, Lea, Syn. 32 224 



cornuiiis, Barnes, Syn. 25 224 



costatus, Raf. Syn. 41 225 



crassus, 1816, 1818, 1819, N. E. 1, 2, 3 eds. pi. 1, fig. 8 49 



crassiis, Say. Syn. 19, 224 



crassus, Wood? Syn. 20 224 



cuneatus, Raf. Syn. 39 225 



cuiieaius, Barnes, Syn. l,phaseolus, Hild 223 



runeaUis, Sw. Syn. 15, v. U. cuneatus, Barnes 224 



cuprinus Lea,, Syn. 51 225 



cylindricus, 1816, 1818, 1819, N. E., 1,2, 3eds.pl. 4, fig. 3, 



Syn. 10 52,224 



cyphius, Raf. Syn. 23 224 



declivis, 1831, Tr. J. iv. 527, Am. Con, March, 1832, iv. 



pi. 35 190, 149 



decisus. Lea, var. Syn. 35 224 



dehiscens, Oct. 7, 1829, N. H. D. ii. 308 ; Am. Con. Sept. 1830, 



iii.pl. 24 131, 225 



dehiscens, Sept. 1831, Am. Con. iii. pi. 24 173 



dehiscens, Say, Syn. 44 



depressus, Raf Syn. 18, v. U. lineolatus, Raf 224 



dilatatus, Raf. Syn. 9 223 



■ donaciformis, Lea, Syn. 6 223 



ebenus, Lea, Syn. 36 224 



plegans. Lea, Syn. 16, v. U. truncatus, Raf 224 



ellipsis. Lea, April, 1831, Am. Con. ii. pi. 14 164 



ellipsis, Lea, Syn. 34 224 



ellipsarius, Raf S3'n. 19 224 



dliplicus, Barnes,Syn. 19 , 224' 



fahalis, Lea, Syn. 49 225 



fasciatus, Raf Syn. 3 223 



fasciolaris, Raf Syn. 20 224 



fasciolus, Raf. Syn. 13 224 



flavus, Raf Syn. 22 224 



flexuosus, Raf Syn. 27 224 



fnrmosus. Lea, Syn. 15 224 



