198 BULLETIN d1, UNITED STATES NATIONAL MUSEUM. 



CTMOPOLIA RATHBUNI (A. Milne Edwards and Boarier). 



Plate 48, figs. 1 and 2. 



Palints rathbuni A. Milne Edwards and Bouviek, Bull. JIus. Illst. Nat, 



Paris, vol. 5, 1809, p. 125, "la mcr dcs Antilles"; Meui. Mus. Coiiip. 



Zool., vol. 27, 1902, p. no, pi. 9, flgs. 1-7 (type-locality, Barbados, 71 



fathoms; Cat. No. G50S, M.C.Z.). 

 Palmis nltcrnatvs Rathbun, Bull. U. S. Fish Comm., vol. 20, for 1900, 



pt. 2 (1901), p. 12 (part: female specimen from St. Thomas). 



Diagnosis. — Ambulatory legs of second pair twice as long as width 

 of carapace. Lobes on anterior margin of carpus of ambulatory 

 legs obsolescent. Lateral emarginations of front minute. Outer 

 suborbital lobe subtruncate, far back and exceeded by pterj^gos- 

 tomian lobe and by lobe of exognath. 



Description. — Carapace with areolations not sharply defined, orna- 

 mented with large granules and granulated tubercles, and devoid of 

 hairs. The largest tubercles are four across cardiac region. Median 

 emargination of front much wider than deep; lateral emarginations 

 feeble, V-shaped. Middle lobe of supra-orbital margin subtriangu- 

 lar, obtuse, outer margin convex; next lobe narrower, inner margin 

 convex, outer margin partially overlapping outer orbital tooth. 

 This last is directed obliquely outward and forward with the tip 

 obtuse and turned inward. Remaining teeth of lateral margin two 

 m number, well separated, blunt, the first the larger, its anterior 

 margin nearly straight and transverse, posterior margin oblique and 

 convex ; anterior margin of second tooth concave and transverse, poste- 

 rior margin longitudinally oblique and straight; margin behind teeth 

 crenulate. Posterior margin ornamented with a convex and slightly 

 sinuous row cf tubercles, two long ones, separated by two short 

 ones and followed on either side by two of medium length. Outer 

 lobe of suborbital margin transverse, truncate, slightly convex, far 

 back, as is also the oblique inner lobe which is almost completely 

 hidden by the pterygostomian Icbe, which has a broadly rounded ex- 

 tremity, and by the lobe of the exognath. First movable segment of 

 antenna strongly widened distally. 



Chelae of female slender, feeble. 



Ambulatory legs long and slender, lobes of carpus almost obsolete, 

 margins of propodus nearly parallel, the segment widening very 

 little in distal half; merus of first leg with a large triangular distal 

 tooth, merus of second and third legs with an inconspicuous, blunt, 

 distal tooth or lobe, surface sparingly granulate; dactyli long and 

 narrow, almost wholly concave on posterior margin. 



