98 U.S. NATIONAL MUSEUM BULLETIN 287 



County, North Carolina); 1905, Schuchert, Dall et al, USNMB 



53, pt. 1, p. 113 (USNM 113062). 

 cyclus, Pirenella 1919, PUSNM, vol. 56, no. 2295, p. 346 (Laguna 



Beach, California; USNM 215572). 

 Cydippina 1900, PUSNM, vol. 23, no. 1210, p. 292. Type-species by 



original designation: Macoma breinfrons Say. 

 cygniis, Thyasira 1916, CSWM, p. 26, u.u; 1916, PUSNM, vol. 52, 



no. 2183, p. 409 (USFC sta. 4224, Cygnet Inlet, Boca de Quadra, 



Alaska; USNM 222618). 

 Cylichnium 1908, BMCZ, vol. 43, no. 6, p. 242. Type-species by 



original designation: Utriculus domitus Dall. 

 cylindrellus. Scaphander 1908, BMCZ, vol. 43, no. 6, pp. 21^, Z39, 



pi. 8, fig. 1 (ALBATROSS sta. 4672, 88 miles SW of Palominos 



Light, Peru; USNM 110563). 

 cylindrellus, Triforis 1881, BMCZ, vol. 9, no. 2, p. 83 (Cape San 



Antonio tCuba]); 1889, BMCZ, vol. 18, p. 250, pi. 20, fig. 6. 

 cylindriciim, Epitonium 1917, PUSNM, vol. 53, no. 2217, p. 480 



(near La Paz, Lower California; USNM 271037). 

 cymata, Atnphissa versicolor 1916, N, vol. 30, no. 3, p. 27 (no 



locality given). 

 cymata, Lora lenuiUrata 1919, PUSNM, vol. 56, no. 2288, p. 42, pi. 



16, fig. 4 (Nunivak Island, Bering Sea, to Shumagin Islands, 



Alaska; USNM 226186). 

 cymata, Mactra (Mactrotoma) 1898, TWFIS, vol. 3, pt. 4, p. 893, pi. 



33, fig. 23 (Oligocene, Oak Grove, Florida); 1905, Schuchert, Dall 



et al, USNMB 53, pt. 1, p. 384 (USNM 107615). 

 cymala, Poromya 1890, PUSNM, vol. 12, no. 773, p. 289, pi. 8, fig. 4 



(USFC sta. 2762, E of Rio Janeiro [Brazil]). 

 cymata, Psephidia 1913, PUSNM, vol. 45, no. 2002, p. 593 (near 



Cerros Island, Lower California; USNM 266158); 1921, USNMB 



112, p. 44, pi. 3, fig. 2. 

 cymatias^ Bulimulus (Naesiotiis) 1917, PCAS, ser. 4, vol. 2, pt. 1, 



no. 11, p. 380 (Indefatigable Island, Galapagos; CAS); 1928, 



PCAS, ser. 4, vol. 17, no. 5, p. 169, pi. 8, fig. 19. 

 Cymatochiton 1882, PUSNM, vol. 4, no. 228, p. 282. New name for 



Cymatodus 'Carpenter' Dall, 1882, not Newberry, 1870. 

 Cymatocyclas 1903, PBSW, vol. 16, p. 7. Type-species by original 



designation: Pisidium compressum Prime. 

 Cymatodus 'Carpenter' Dall, 1882, PUSNM, vol. 4, no. 228, pp. 282, 



286 [see Cymatochiton] . 

 Cymatoica 1890, PUSNM, vol. 12, no. 773, p. 272. Type-species by 



subsequent designation, Dall, 1900, PUSNM, vol. 23, no. 1210, p. 



292: Telluia inidulata Hanley (+ occidentalis Dall). 

 cymatophorum, Cerithiiim 1893, PUSNM, vol. 16, no. 946, p. 475, 



pi. 56, fig. 1 (Miocene, Penjinsk Gulf, Siberia; USNM 4790). 



