POLYCLADS OF W, INDIES AND FLORIDA — HYMAN 135 



Gnesioceros floridana (Pearse), 1938 



Imagine oculifera, Verrill, 1892, p. 475, pi. 40, fig. 1 (not /. oculifera Girard, 1853). 

 Stylochoplana floridana Pearse, 1938, p. 77, fig. 27. 

 Stylochoplana oculifera Pearse and Walker, 1939, p. 18, fig. 10. 

 Gnesioceros verrilli Hyman, 1939c, p. 146, figs. 14-16. 

 Gnesioceros floridana, Hyman, 1940, p. 478. 



Remarks: Two specimens of this species, one juvenile and the other 

 mature, were taken by W. L. Schmitt in the Smithsonian-Hartford 

 Expedition on the east shore of the harbor at Charlotte Amalie, St. 

 Thomas, Virgin Islands, Apr. 4, 1937. They have been returned to 

 the museum as a whole mount. This species is easily recognized as a 

 whole mount by the conchlike cirrus end covered with parallel toothed 

 bands. As the general appearance and sexual anatomy of this species 

 have been described and figured by Hyman (1939c) under the name 

 Gnesioceros verrilli, repetition appears unnecessary here. This species 

 is common along the Atlantic coast from Massachusetts to Texas. 

 I take this opportunity of placing on record the sending by J. Hedgpeth 

 of a number of specimens of G. floridana from Port Aransas, Tex. No 

 doubt the Gnesioceros sargassicola lata included in a faunal list (no 

 author, no date) from Grande Isle, off Louisiana, is a misidentification 

 of G. floridana. 



Genus Styloplanocera Bock, 1913 



Definition: Planoceridae of long slender form with tentacles; eyes 

 inside the tentacles and around their bases; with seminal vesicle and 

 interpolated prostatic vesicle; cirrus sac elongated containing a narrow 

 sinuous ejaculatory duct Imed with spines; Lang's vesicle with a pair 

 of lateral pouches that extend far forward. 



Type species: Stylochus fasciatus Schmarda, 1859. 



Styloplanocera fasciata (Schmarda), 1859 



Figure 86,6 



Stylochus fasciatus Schmarda, 1859, p. 33, pi. 7, fig. 76. 



Styloplanocera papillifera Bock, 1913, p. 233, text-figs. 47, 48, pi. 5, fig. 16, pi. 6, 



figs. 4-7. 

 Styloplanocera fasciata, Stummer-Traunfels, 1933, p. 3550, figs. 119, 120. 



Remarks: As Bock has given an excellent illustrated account of 

 this species and Stummer-Traunfels has verified the description, there 

 is no necessity for spending words upon it. A single specimen was 

 taken by W. G. Hewatt at Rinc6n Playa, Puerto Rico, Mar. 7, 1946, 

 under flat rocks in surf. This species is easily recognized as a whole 

 mount (fig. 86,6). The specimen was 18 mm. long by 7 mm. wide, in 

 life, and light gray with brownish tints. The Schmarda specimen 



