NO. 3 GARTH : SOME NEW SPECIES OF BRACK YURAN CRABS 71 



Genus HETEROGRYPTA Stimpson 



Heterocrypta colombiana, new species 

 Plate 18, Figs. 1-2 



Type: Male, holotype, Cat. No. 78778, U.S. National Museum, 

 from Port Utria, Choco, Colombia, shore; February 15, 1934; collected 

 by Allan Hancock Expedition of 1934 at Velero Station 239a-34. Fe- 

 male, allotype, Cat. No. 351, Allan Hancock Foundation, The Uni- 

 versity of Southern California, from Salinas Bay, Costa Rica, V/z fath- 

 oms; February 11, 1935; collected by Allan Hancock Expedition of 

 1935 at Velero Station 478-35. 



Measurements: Male holotype: length of carapace 4.9 mm., width 

 7.0 mm., length of major chela 4.5 mm., of major dactyl 1.8 mm., 

 height of gape 0.8 mm. Female allotype : length 4.5 mm., width 6.7 mm. 



Diagnosis: Posterior margin of carapace almost straight, a well- 

 defined angle at branchial ridge. Merus of fourth walking legs con- 

 cealed in dorsal view. Rostrum elongate, faintly trilobate. Major chela 

 half as high as long, fingers widely gaping. 



Description: Carapace depressed, width nearly one and one-half 

 times length, smooth and microscopically punctate. Branchial ridge 

 paralleling the anterolateral border, although more nearly straight, and 

 consisting of a double row of beaded granules. A short, transverse gas- 

 tric ridge joining the branchial ridges, the carapace highest at their 

 point of union. From this prominence a faint single line of granules 

 extends half way to the orbit. Cardiac region low and nongranulate, 

 although the punctae appear larger on this area. Posterior margin be- 

 tween branchial ridges almost straight, hiding the merus of the fourth 

 walking legs from dorsal view but leaving the basal abdominal segment 

 visible; a pronounced angle at its lateral extension beyond the branchial 

 ridge. Rostrum broadly elongate, margin granulate, faintly trilobate. 

 Orbit with a closed fissure above. 



Under surface of carapace covered with beadlike granules except 

 beneath lateral and posterior margins. Under side of rostrum excavate, 

 antennules folding acutely, almost parallel to one another. Basal an- 

 tennal article minute, the short flagellum not excluded from the orbit 

 and lodged at the side of a prominent suborbital tooth, which is sepa- 

 rated from the exorbital prominence by a deep and relatively wide 

 fissure. External maxilliped completely granular, merus notched at inner 

 angle for insertion of palpus and produced at the external angle so that 



