388 



A. E. Yerrill — Decapod Crustacea of Bermuda. 



Of the lateral teeth, the first eight are subequal, all acute and 

 curved forward; the third is a trifle wider; posterior lateral tooth 

 not very large, about twice as long as the preceding, acute, curved 

 a little forward. Merus of chelipeds with four strong anterior spines 

 directed forward, and sometimes a small or subobsolete distal pos- 

 terior one, which may be wholly lacking ; two carpal spines rather 

 short. Manus with a strong dorsal carina, ending in a sharp diver- 

 gent tooth at about the distal fourth. Merus of swimming feet 

 broader distally, its posterior distal angle armed with a very small 

 sharp spine and several more minute, acute denticles. 



Figure 33. — Aclietous Sniifhii: a, first ambulatorj' leg; b, swimming leg; 

 d, denticulated angle of merus, enlarged. Phot. A.. H. V. 



This form is very closely allied to A. spinitnamis, from which 

 it is best distinguished by the less prominent front ; the smaller and 

 nearh^ equalh^ prominent frontal teeth; the shorter and weaker pos- 

 terior lateral spines ; and by the small or nearly obsolete posterior 

 distal spine of the merus of the chelii)eds. The chelipeds are also 

 longer. Some of our specimens (No. 4035) were catalogued as .4. 

 spinitnanus by Prof. S. I. Smith, Avho depended on the figure of 

 A. M.-Edwards. The type specimens, here described and figured, 

 are from that lot. 



Measurements of Types and Cotypes. 



The ratio of length to breadth, not including large lateral spines, 

 is 1: 1.40 to 1:1.45. 



