442 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



margin minutely crenulate, upper part with two closed fissures; outer 

 hiatus a triangular notch; lower margin produced to form an obtuse 

 tooth at inner angle. Subhepatic region granulate, without tubercle. 



Chelae unequal but similar. Carpus rough with small tubercles 

 and having a distal groove and a small blunt tooth at inner angle. 

 Hands robust, inflated, smooth except near articulation with carpus 

 where there are scattering granules; upper and lower margins rounded. 

 Fingers long, down-curved, smooth, canaliculate, their cutting edges 

 irregularly armed with small and rather sharp teeth, without any 

 prominent basal tooth; when closed the fingers gape slightly and tips 

 cross. Legs setose, merus with small teeth on upper edge. Penult 

 segment of male abdomen with concave sides, terminal segment broad 

 and rounded. 



Measurements. — Male holotype, length of carapace 6.5, width of 

 same 10.25 mm. 



Range. — Known only from the single type specimen, male (4484, 

 M.C.Z.) from the Bay of Panama; lat. 7° 33' 00" N.; 85 fathoms; 

 sft. gn. M. brk. Sh.; temperature 57.3° F.; March 11, 1891; station 

 3397, Albatross. 



Remarks. — Allied to M. xanthiformis, but carapace much broader 

 and more convex from front to back, front less prominent and desti- 

 tute of lobules at lateral angles, and carpal tooth of cheliped blunt. 



MICKOPANOPE XANTHIFORMIS (A. Milne Edwards) 



Plate 180, Figures 7 and 8 



Panopeus xanthiformis A. Milne Edwards, Crust. R6g. Mex., 1880, p. 353, pi. 



53, figs. 4^46 (type-locality, off Grenada, 92 fathoms; type in Paris Mus.); 



Bull. Mus. Comp. Zool., vol. 8, Dec, 1880, p. 13. 

 Micropanope xanthiformis Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 



4, 1898, p. 274; Bull. U. S. Fish Comm. for 1900, vol. 20, pt. 2 (1901), p. 



32. — A. Milne Edwards and Bouvier, Mem. Mus. Comp. Zool., vol. 47, 



1923, p. 324. 



Diagnosis. — Shape xanthoid. Front shallow. Carapace and cheli- 

 peds very rough in adults. Subhepatic tubercle ill defined. 



Description. — Carapace depressed, coarsely granulate on anterior 

 arch, granules depressed; regions well marked; an oblique ridge on 

 hepatic region. Front slightly deflexed, shallow; lobes separated by 

 a narrow fissure; margins sinuous, on the whole convex but with a 

 distinct rectangular outer corner. Orbits wide, margin finely crenu- 

 late. Five antero-lateral teeth; second small, blunt, in adults con- 

 siderably larger than postorbital angle, in the young obsolescent; 

 third and fourth teeth large, acute; last very small and pointed; teeth 

 with granulate margins. A shght subhepatic elevation formed by a 

 number of granules. 



Chelipeds rugose with coarser granules (or tubercles) than on 

 carapace. Arm with a row of spines above; wrist with a deep anterior 



