NO. 3 GARTH : SOME NEW SPECIES OF BRACHYURAN CRABS 91 



Panama, three fathoms, mud; March 2, 1938; collected by Allan Han- 

 cock Expedition of 1938 at Velero Station 865-38. Four males and one 

 female, paratypes, from Port Utria, Colombia, 20 fathoms; February 14, 

 1934; collected by Allan Hancock Expedition of 1934 at Velero Station 

 233-34. 



Measurements: Female holotype: length of carapace 8.5 mm., 

 width at posterior border 11.9 mm., at lateral angles 10.2 mm., width 

 of front 1.8 mm., of fronto-orbit 4.6 mm., length of cheliped 14.6 mm., 

 of manus 7.5 mm., of dactyl 4.9 mm., of fourth ambulatory leg 20.6 mm. 



Diagnosis: Carapace broad anteriorly. Front advanced, bilobed. 

 Fingers greatly elongated. Third ambulatory leg more than twice the 

 width of carapace measured at lateral angles. Merus of third maxilli- 

 ped elongate oval. 



Description: Carapace superficially smooth and bare, microscopi- 

 cally granulate; length between two-thirds and three-fourths times 

 width ; lateral margins less convergent anteriorly than those of C. latipes 

 Rathbun (1898). Front advanced beyond general outline of carapace. 

 Orbits curving forward and downward to a broad exorbital lobe which 

 turns backward to become the granulate anterolateral margin. Gastric 

 area indicated by two shallow longitudinal furrows connected by a 

 transverse furrow in the form of an H. Branchial regions swollen. 

 Greatest width of carapace at posterior margin. Antennules folding 

 transversely beneath the front. Antennae long and slender. Epistome 

 diamond shaped. Merus of third maxilliped longer than broad, oval; 

 tip of palpus hairy. Female abdomen and sternum finely granulate. 



Female chelipeds subequal, carpus and manus smooth and glabrous. 

 Merus with a superodistal tubercle surmounted by hairs. Carpus with a 

 granulate outer margin and a sharpened tooth at inner angle bearing a 

 cluster of hairs. Manus with short superior margin. Fingers slightly de- 

 flexed, long, straight, slender, prehensile edges alternately large and small 

 spinulous, tips incurving. Inferior margin of hands with a hairy ridge. 

 Male chelipeds increasingly disproportionate with age. Manus of half- 

 grown male as high as broad, upper and lower borders subparallel, smooth 

 and bare except for a strip of fine granulation across lower proximal 

 corner. Fingers strongly deflexed, meeting with an elongate gape, tips 

 incurving. Dactyl with outer margin slightly concave, almost straight, 

 three subequal teeth at base ; pollex also with three denticles opposite basal 

 constriction. Minor chela of male as described for female. (See pi. 26, 

 figs. 2 and 3.) 



