334 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 8 



petals a bit longer but not equal to the unpaired one, the lunules 18x5 mm 

 and 10 mm from margin. Interambulacral lunule relatively small, about 

 equal to one of the anterior pair; its posterior end about 10 mm from 

 margin. Lower surface of test flat and not peculiar. Spines of abactinal 

 surface \er}' numerous, slender with abruptly bulbous tips, lying inclined 

 towards horizontal, forming a fairly close coat ; on the lower side the spines 

 are relatively long but lie nearly horizontal ; they may be blunt or pointed 

 but are not notably enlarged at tip. Color of upper surface Saccardo's 

 umber of Ridgway's Standard, but warm sepia and cinnamon brown on 

 oral surface. 



In addition to the holotype, there are but two other smaller adults and 

 a bare test. This test is 130 mm long, 125 mm wide and 13 mm high ; aside 

 from its elongated form it is peculiar in having the anterior petal more 

 elongated than in the tj'pe and relatively narrower. One of the other speci- 

 mens, 120 mm long by 122 mm wide, is notable for its very dark color, 

 Chaetura drab above, and cinnamon drab orally on the interambulacra, 

 more drab on the ambulacral areas. The test itself is light olive gray. The 

 other small adult is about 107 mm each way and the color is intermediate 

 between the other two adults, a dull drab above, more cinnamon below. 

 Although resembling fragilis in some ways, the character of the more solid 

 test and the narrow poriferous zones of the anterior petal serve to distin- 

 guish this southern form. 



Distribution. — This Encope is the tropical continental species, quite 

 different from the Galapagos species and readily distinguished from the 

 Panamic or Mexican forms. In addition to the 4 adults, there are 92 young 

 Encopes, 5-30 mm in diameter which are too young for positive identifica- 

 tion but are here considered as ecuadorensis on geographical grounds. The 

 material was all taken at 5 stations on the Ecuadorean coast between 

 Santa Elena Bay, Lat. 2° 10' 36" S, and San Francisco Bay, Lat. 0° 38' 

 40" N, in 2-12 fms. 



T>'/>^.— Holot>'pe, AHF no. 54, 2 paratypes. 



Type locality. —Station 205-34, Santa Elena Bay, off La Libertad. 

 Ecuador, 8-10 fms, February 8, 1934. 



Distribution. — Ecuador. 



Depth.— 2-\2 fms. 



Specimens examined.—Thc type, paratypes and 93 specimens, from 6 

 stations. 



