292 U.S. NATIONAL MUSEUM BULLETIN 287 



sedillina Dall and Bartsch, Turbonilla (Dunkeria) 1909, USNMB 



68, p. 121, pi. 12, figs. 3, 3a (USBF sta. 2823, off La Paz, Gulf of 



California; USNM 162697). 

 segregata, Tellina 1900, TWFIS, vol. 3, pt. 5, p. 1019, pi. 37, figs. 7, 



8 (Oligocene, Ballast Point, Tampa Bay, Florida); 1905, Schuch- 



ert, Dall et al, USNMB 53, pt. 1, p. 646 (USNM 157847); 1915, 



USNMB 90, pi. 17, figs. 3, 11. 

 seguenzae, Pleurodon 1898, TWFIS, vol. 3, pt. 4, p. 601 (Astiano 



division of Calabrian Pliocene). 

 seguenzae, Verticordia 1886, BMCZ, vol. 12, no. 6, p. 290 (Yucatan 



Strait [Mexico] ; and others). 

 sella, DrilUa 1915, USNMB 90, pp. 19, 41, pi. 12, fig. 10 (Tampa 



silex beds. Ballast Point, Tampa Bay, Florida; USNM 165035). 

 sello, Pleurotoma 1918, PUSNM, vol. 54, no. 2238, p. 333. Ne^^ 



name for [Pleuroto)na] biseriata E.A.Smith, 1882, not Conrad 



1834. 

 semele, Rocheforlia ( Rochefortina) 1924, PBSW, vol. 37, p. 88 



(Oahu, Hawaiian Territory; USNM 333070). 

 Semelina 1900, TWFIS, vol. 3, pt. 5, p. 986. Type-species by 



original designation: Semele nuculoides Conrad. 

 semicingidata, Acleon 1927, PUSNM, vol. 70, art. 18, no. 2667, pp. 



3, 19 (off Fernandina [Florida] ; USNM 107913). 

 semilimata, Ringicula 1896, PUSNM, vol. 18, no. 1035, p. 24 



(Calhoun County and Oal^ Grove, Santa Rosa County, Florida; 



USNM 113111); 1903, TWFIS, vol. 3, pt. 6, p. 1633, pi. 60, fig. 



24 

 Semimopalia 1919, PUSNM, vol. 55, no. 2283, p. 514. Type-species 



by monotypy: Mopalia (Semimopalia) grisea Dall. 

 seminella, Corbula (Cuneocorhula) 1898, TWFIS, vol. 3, pt. 4, p. 



848; 1900, TWFIS, vol. 3, pt. 5, pi. 36, fig. 11 (Oligocene, Chipola 



River, Florida; and others); 1905, Schuchert, Dall et al, USNMB 



53, pt. 1, p. 170 (Oak Grove, Santa Rosa County, Florida; USNM 



135910). 

 seminiida, Modiolaria 1897, NHSBCB 2, art. 1, p. 5, pi. 1, fig. 1 



(Markoffsl<:i Bay, Unalaska; off Sannakh Islands, Alaska). 

 seminiida, Yoldia 1871, AJC, vol. 7, pt. 2, p. 153 (St. Paul's harbor, 



Radiak [Kodiak, Alaska] ). 

 seminula, Marginella 1881, BMCZ, vol. 9, no. 2, p. 72 (Yucatan 



Strait [Mexico]); 1889, BMCZ, vol. 18, p. 139, pi. 19, fig. 2. 

 semiruhida, Acmaea 1914, N, vol. 28, no. 2, p. 14 (Gulf of California 



to Panama). 

 semirugosa, Diplodonta 1899, JC, vol. 9, no. 8, p. 246. New name 



for Diplodonta semiaspera Carpenter, 1857. not Philippi, 1836. 



