318 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



METOPAULIAS DEPRESSUS Rathbnn. 

 . PINE CRAB. 



Plate 97, figs. 3 and 4. 



Metopaulias deprcssus RATHBUN, Proc. U. S. Nat. Mus., vol. 19, 1896, p. 144 

 (type-locality, Newport (Manchester), Jamaica; female liolotype. Oat. 

 No. 19407, U.S.N.M.). 



Diagnosis. One lateral tooth. Legs slender. 



Description. Postero-lateral margins parallel, antero-lateral mar- 

 gins gently curved, so that the carapace is sensibly narrower in front ; 

 length equal to or greater than anterior width. Mesogastric and 

 cardiac regions deeply delimited. Surface densely covered with 

 punctae; toward the front there are sparsely distributed short lines 

 of scabrous granules. 



Front a little less than half as wide as carapace, about three and 

 one-half times as wide as high, very concave in both directions, side 

 margins vertical, surface nearly smooth; supra-frontal lobes flat 

 above, strongly projecting, deeply separated, either subtriangular or 

 obliquely truncated, those of the inner pair most produced at the 

 inner angle, those of the outer pair at the outer angle ; median sinus 

 of lower margin much wider than that of the upper margin ; with a 

 projecting lobe either side, beyond which a shallow sinus extends 

 to the rounded outer angle. 



Upper margin of orbit concave; outer angle acuminate, directed 

 forward. Lateral tooth subrectangular. 



Chelipeds equal, of moderate size ; outer surface of arm and wrist 

 crossed by very short granulated lines; on the palm, the granules 

 are arranged in short ridges at the proximal end, but elsewhere 

 singly, except near the distal end of the outer surface which is 

 smooth. Upper margin of arm granulate ; lower and inner margins 

 spinulous, the latter with a small triangular expansion on its distal 

 half. Fingers long, rather narrow, prehensile edges irregularly 

 toothed and nearly meeting. Dactylus granulate above for the 

 proximal half. 



Third leg two and one-half times as long as carapace, its merus 

 from three and one-half to four and one-half times as long as wide. 

 The merus joints are widest in the middle and diminish a little 

 toward both ends; upper surface sparingly roughened, anterior 

 margin acute at the end; subterminal tooth subrectangular with a 

 short acute tip. Posterior margin of propodal joints and both 

 margins of dactyli densely hairy, other margins sparingly so. 



Measurements. Female holotype, length of carapace in median 

 line 17.8, greatest width of same 19.8, anterior width of same 17, 

 width of front 8.5 mm. 



Habitat. Found on the large broad-leaved pine of a vivid green 

 which grows abundantly on the tree trunks on the rugged limestone 



