78 U.S. NATIONAL MUSEUM BULLETIN 287 



Chlnmydoconcha 1884, S, vol. 4, no. 76, p. 51. Type-species by 



monotypy: Chlamydoconcha orcutti Dall. 

 r/i/oris, Mopalia 1919, PUSNM, vol. 55, no. 2283, p. 513 (San 



Diego, California; USNM 293686). 

 chloris, ? Scintilla 1918, PBSW, vol. 31, p. 5 (Magdalena Bay, 



Lower California; USNM 218179). 

 chocolata, Circinaria vancouverensis 1905, HAE, vol. 13, p. 34 



(Sitka, Alaska). 

 Chonechiton 'Carpenter' Dall, 1882, PUSNM, vol. 4, no. 228, p. 



280. Type-species by original designation: CliotecJiiton (Cliiton) 



viseticola Ryckholt. 

 Choneplax 'Carpenter' Dall, 1879, SREA, art. 4, p. 81; 1879, 



PUSNM, vol. 1, no. 48, p. 299, ujl; 1882, PUSNM, vol. 4, no. 



228, pp. 285, 288. Type-species by original designation: Cliitoii 



strigatii.'^ Sowerby. 

 chorisles, Emarginiila 1925, PUSNM, vol. 66, art. 17, no. 2554, p. 



16, pi. 26, figs. 1, 4 (ALBATROSS sta. 4917, eastern Sea of 



Japan; USNM 110781). 

 Christina, Mangilia ? 1927, PUSNM, vol. 70, art. 18, no. 2667, pp. 4, 



38 (off Fernandina [Florida] ; USNM 107937). 

 christyi, Segmentina (Planorbiila) 1905, HAE, vol. 13, p. 99, pi. 2, 



figs. 10, 11 (High Bluff, Manitoba; Fort Smith, Mackenzie River, 



Canada). 

 chrysis, Pfinomya ampla 1909, USGSPP 59, pp. 18, 133, pi. 11, fig. 



7 (Miocene, Goldwashers Gully, Coos Bay, Oregon; USNM 



154093). 

 chrysocoma, Nucula 1908, BMCZ, vol. 43, no. 6, pp. 219, 370, pi. 18, 



figs. 3, 4 (ALBATROSS sta. 4656, off coast of Peru, lat. 6°55'S, 



ion. 83°34'W; and others; USNM 110572). 

 chrysogona, Tellina (Moerella) 1908, BMCZ, vol. 43, no. 6, pp. 221, 



420, pi. 10, figs. 4, 8 (ALBATROSS sta. 4642, 4 miles S 4rE 



from Ripple Point, Hood Island, Galapagos Islands; USNM 



110581). 

 chrysothemis, Cryptogemma 1919, PUSNM, vol. 56, no. 2288, p. 



31, pi. 11, fig. 2 (USBF sta. 4405, between San Clemente and 



Santa Catalina Islands, California; USNM 208908). 

 chthonius, Callistochiton 1919, PUSNM, vol. 55, no. 2283, p. 511 



(San Pedro, California; USNM 109488). 

 Cidarina 1909, USGSPP 59, p. 98. Type-species by original desig- 

 nation: Margantes cidaris A. Adams. 

 cinca, Melanella 1927, PUSNM, vol. 70, art. 18, no. 2667, pp. 4, 65 



(off Fernandina [Floridal ; USNM 108028). 

 cincta, Mitromorpha 1890, TWFIS, vol. 3, pt. 1, p. 95, pi. 3, fig. 6 



(Caloosahatchie beds, Caloosahatchie River [Florida]); 1905, 



Schuchert, Dall et al, USNMB 53, pt. 1, p. 406 (USNM 97383). 



