280 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 11 



papillae, and a similar number in the dorsal rows. Sole well developed, 

 with three hands of cylindrical feet. Spicules a dense layer of low, squat 

 tables; in the adult, with a circular disk with 8 to 12 small holes, single 

 crossbeam, and a wreath of small spines on the top; C-shaped bodies 

 present in varying numbers and sizes. Feet with large end plate and 

 large supporting plates with numerous holes; smaller curved rods or 

 plates in the dorsal appendages. Dorsal appendages usually lacking end 

 plate. Tropical shores of America. 



Type species: Stichopus badionotus Selenka. 



Key to the species of Isostichopus 



Tables taller than wide; profile of tables rectangular. Color vari- 

 able, from black to orange, often spotted or striped. Common 



in the West Indies, including Bermuda 



badionotus (Selenka) 



Tables about as wide as tall ; profile roughly quadrate. Color uni- 

 formly chocolate brown with paler ventral side; young more 

 lightly colored, often with a faint reticulum of darker brown 

 on the dorsum. Tropical west coast of Mexico, Central and 

 South America fuscus (Ludwig) 



Isostichopus fuscus (Ludwig) 

 PI. 1, figs. 1-3 



Stichopus fuscus Ludwig, 1875, p. 97; 1898, p. 5, pi. 1, figs. 1-5. 

 H. L. Clark, 1910, p. 350 (not examined) ; 1922, p. 45 (re- 

 jected as unidentifiable). Deichmann, 1937. p. 163; 1938, p. 

 363. Steinbeck & Ricketts, 1941, p. 410. 

 Stichopus badionotus Selenka, 1867, p. 316 (partim). H. L. Clark, 



1922, p. 55 (partim). 

 Non Stichopus fuscus Theel, 1886a, p. 5 (Parastichopus calif ornicus 

 (Stimpson), from San Diego, California). 

 Diagnosis: See diagnosis of genus and key. 

 Type: Possibly in Germany. 



Type locality: "Patagonia," probably wrong. As a substitute one 

 might use Machalilla, Ecuador, from which locality Ludwig reported 

 it in 1898. 



Distribution: Common from Ecuador to the upper end of the 

 Gulf of California; also in the Galapagos, Socorro, and Cocos Islands. 

 Not known from the western coast of Lower California or from Cali- 

 fornia. 



