388 



A. E. V err ill — 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 dislally, its posterior distal angle armed with a very small 

 sharp spine and several more minute, acute denticles. 



Figure 83. — Achelous Srnithii. 



first ambulatory leg ; b, swimming leg ; 



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



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

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

 nearl}^ equally 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 chelipeds. The chelipeds are also 

 longer. Some of our sy^ecimens (No. 4035) were catalogued as A. 

 spinimamis by Prof. S. I. Smith, who depended on the figure of 

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

 are from that lot. 



Measvrements of Types and Cotypes. 



