74 U.S. NATIONAL MUSEUM BULLETIN 239 



expleta, Modiolaria: 1861, PBSNH, vol. 8, p. 37 (Hong Kong 

 Harbor [China], W. Stimpson), long. 6, alt. 4, lat. 2 mm.; 1862, 

 Otia Conch., p. 176. Holotype USNM 2068, not found. NPEE. 



exquisita, Julia Plate 45, figs. 3, 5 



1862, PBSNH, vol. 8, p. 284 (Sandwich [Hawaiian] Islands, E. 

 Johnson), long. 5, lat. 4, alt. 4 mm.; 1862, Otia Conch., p. 241. 

 Dall, 1898, Trans. Wagner Free Inst. Sci., vol. 3, pt. 4, p. 810, calls 

 attention to an apparent syntype of this species in the W. Newcomb 

 coll. at Cornell University, Ithaca, New York. This specimen was 

 observed by A. D. Howard, 1951, Nautilus, vol. 64, p. 84. Half 

 lectotype, here selected, Cornell Univ. Paleo. Dept. 17774; the lot 

 also contains a larger opposing paratype valve. 



falcata, Alasmodon[ta]: 1850, PBSNH, vol. 3, p. 294 (Wallawalla, 

 Oregon [Washington]; Sacramento River, California), long. 4, alt. 

 1%, lat. 1 in.; 1852, USEE, vol. 12, p. 433, pi. 38, fig. 545,a-b 

 (Wallawalla, Spokane, Wahlamet, etc., Oregon [Washington], J. 

 Drayton; Upper Sacramento River, California, Pickering); 1862, 

 Otia Conch., p. 87. Figured holotype USNM 5929, specific locality 

 not mentioned; paratype MCZ 169160 ex NYSM [not previously 

 cataloged] from the Smithsonian Inst, (printed label). 



falcata, Cleodora [(Creseis)]: 1852, USEE, vol. 12, p. 490, pi. 51, 

 fig. 608, a (between Oregon and the East Indies, Dana), long. % in.; 

 1862, Otia Conch., p. 235. 



falcata, Mactra: 1850, PBSNH, vol. 3, p. 216 (Puget Sound, Oregon 

 [Washington]), long. 3%, alt. 2%, lat. 1% in.; 1852, USEE, vol. 12, 

 p. 393, pi. 34, fig. 506, a-b (northwest coast, Puget Sound [Wash- 

 ington], Case) ; 1862, Otia Conch., p. 76. Figured holotype USNM 

 5893. 



falcatus, Lithodomus: 1851, PBSNH, vol. 4, p. 92 (Monterey 

 [California], in indurated marly clay, W. Rich), long. 3, lat. et alt. 

 % in.; 1853, BJNH, vol. 6, p. 403, pi. 16, fig. 9; 1862, Otia Conch., 

 p. 213. Figured holotype MCZ 169139 ex NYSM 372; original no. 

 3450; 4 paratypes MCZ 169140 and paratype USNM 611271 from 

 same NYSM lot. 



fallax 'Say' Gould, Pupa: 1841, Invert. Massachusetts, p. 192, fig. 

 123 (Martha's Vineyard, L. M. Yale; Rhode Island; Ohio), not 

 Pupa fallax Say. See Pilsbry, 1948, Land Mollusca of North 

 America, vol. 2, pt. 2, p. 921. 



famelicus, Unio: 1850, PBSNH, vol. 3, p. 294 (Wallawalla, Oregon 

 [Washington], Pickering), long. 1%, alt. %, lat. % in.; 1852, USEE, 

 vol. 12, p. 432, pi. 38, fig. 544,a-b; 1862, Otia Conch., p. 88. Fig- 

 ured holotype USNM 5929. 



