POLYCLADS OF W. INDIES AND FLORIDA — HYMAN 137 



came from Jamaica and the Bock specimens from Barbados, Jamaica, 

 and St. Croix, Virgin Islands. It is thus apparent that the species is 

 common tliroughout the West Indies, 



Suborder Cotylea 



Family Pseudoceridae Lang, 1884 



Genus Thysanozoon Grube, 1840 



Thysanozoon nigrum Girard, 1851 



Thysanozoon nigrum Girard, 1851, p. 137. 



Thysanozoon nigrum, Hyman, 1939b, p. 15, fig, 22; 1940, p. 484. 



Remarks: A specimen of this species was collected by Mabel 

 Bishop, wife of the resident naturalist, off the dock in front of the 

 Lerner Marine Laboratory, North Bimini, Bahamas. The animal 

 was caught swimming around a light placed under water. This spe- 

 cies was previously recorded from Bermuda and the coast of Florida. 



Genus Pseudoceros Lang, 1884 



Pseudoceros splendidus Stumnier-Traunfels, 1933 



Pseudoceros superbus Lang, 1884, p. 540, pi. 5, fig. 5, 

 Pseudoceros splendidus Stummer-Traunfels, 1933, p. 3487. 



Remarks: A specimen of this handsome species was taken by W. 

 G. Hewatt under a flat rock in one foot of water on a shore subject to 

 wave action at Rincon Playa, Puerto Rico, Mar. 9, 1946. The speci- 

 men is stated by the collector to have been 38 mm. long and 12 mm. 

 wide, hence rather small as the original specimen of Lang was 60 mm. 

 long and 25 mm. wide. The color of the dorsal surface is described in 

 Hewatt's notes as brown with a chocolate brown middorsal area and 

 a bright orange band around the border edged on each side by a 

 chocolate brown line. The anterior margin shows a white line. Al- 

 though Lang's specimen was of a much darker ground color there is 

 httle doubt of the identification. 



Pseudoceros splendidus is apparently cosmopolitan. The type lo- 

 cality is the Mediterranean and the species has since been found at 

 Bermuda (Hyman, 1939b) and the Galapagos Islands (Plehn, 1896). 

 The present record is the first for its occurrence in the West Indies. 

 Plehn's identification appears dubious, 



Hewatt, like Lang, noted that the species is active, swimming with 

 undulations when disturbed. 



