94 STALK-EYED CRUSTACEA 



slightly toothed ; lateral and posterior angles of the 

 carapace rounded, not spinous. Rostrum very small, 

 horizontal, bifid. The eyes can be folded into a post- 

 foraminal cavity. The orbits are directed forwards and 

 outwards, with a spine on the external border and two 

 spines on the internal, one superior the other inferior. 

 The internal antennae are directed forwards, and separated 

 by a spiniform prolongation. The external antenna; have 

 their first joint soldered with the front, forming a part of 

 the sides of the orbit. The legs of the first pair are of 

 the same size, a little more developed than the succeed- 

 ing ones, once and a quarter the length of the carapace, 

 glabrous and smooth ; fingers bent ; pincers wide, with 

 bunches of hairs in the depression of finger-tips, which 

 have toothed margins. The legs of the second pair are 

 as long as the first pair ; the three other pairs decrease in 

 length ; the last joint of the four last pairs of legs has 

 four or five spines underneath. 



Colour, white, with black patches. 



Range. — Guadaloupe. 



II. Mithrax (Mithrax) sculptus. 



Mithrax sculptus ... A. Milne Edwards, Gibbes. 

 Mithrax minutus . . . Saussure, Desbonne and 



Schramm. 

 Maia sculpta .... Lamarck. 

 Mitliraculus coronatus . White, 

 MitJiracidus sculptus . . Stimpson. 



The carapace is wider than long, with rounded margin. 

 The internal orbital angles are obtuse, and very little 

 advanced. The orbital border has three small tubercules, 

 one inferior, one external, and one superior. The carapace 

 is covered with projections posteriorly, but almost smooth 



