MUSEUM OF COMPARATIVE ZOOLOGY. 13 



The exposed parts of the oral appendages are very nearly as in E. bernhardus. 



The chelipeds are longer, much narrower, and more nearly equal in size than 

 in E. bernhardus, and, as in that species, are almost entirely naked, but beset 

 with numerous tubercles and low spines. The right cheliped is about a? 1 rag 

 as the body from the front of the carapax to the tip of the abdomen. The 

 merus and carpus are subequal in length, while the chela is about once and 

 a half as long as the carpus. The carpus and chela are rounded above and 

 armed with numerous tubercles, which are smaller and more crowded on the 

 chela than on the carpus, but the surface between the tubercles is smooth and 

 polished. The dorsal surface of the carpus is limited along the inner edge by 

 a sharp angle armed with a double line of tul ercles, while the outer edge is 

 rounded. The chela is very little wider than the carpus, and is narrowed from 

 near the base to the tips of the digits, and both edges are rounded. The digits 

 are rather slender, about half as long as the entire chela, slightly gaping, with 

 acute and strongly incurved chitinous tips, and the prehensile edges armed 

 with a very few obtuse tuberculiform teeth. The left chela is much more 

 slender than the right, but reaches to or a little by the base of its dactylus. 

 The carpus is slender, higher than broad, only slightly expanded distally, and 

 with the narrow dorsal surface flattened and margined either side with a single 

 line of spiniform tubercles. The chela is about a third longer than the carpus, 

 slender, about two and a half times as long as broad, and the dactylus about 

 two thirds the entire length. The dorsal and outer surface is tuberculose, and 

 a low obtuse ridge extends from near the middle of the base along the pro- 

 podal digit, which tapers from the base to the tip, while the dactylus is smooth 

 except for a few fascicles of setse, more slender than the propodal digit, and 

 tapered only near the tip. The chitinous tips of the digits are slender, acute, 

 and strongly incurved, and the prehensile edges are sharp, and armed with a 

 closely set series of slender spines or setae. 



The ambulatory legs reach considerably beyond the right cheliped, and the 

 second pair reach to the tips of the first pair. In both pairs the meri and pro- 

 podi are approximately equal in length and longer than the carpi, while the 

 dactyli are about once and a half as long as the propodi, slender, strongly 

 curved, and distally strongly twisted. The two posterior pairs of thoracic lege 

 and the abdominal appendages are very nearly as in E. bernhardus. 



In life the general color of the exposed parts is pale orange, the tips of the 

 chela) and of the ambulatory legs white, the eyes black. 



The eggs are very large, and few in number as compared with the ordinary 

 species of the genus, being 1.0 to 1.1 mm. in diameter in alcoholic specimen-, 

 while in E. bernhardus they are only 0.45 to 0.50 mm. in diameter. 



Three specimens give the following measurements : — 



Statical 



Sex 



Length from front of carapax to tip of abdomen 

 " of carapax along median line 



