28o RATHBUN 



prominent elevations, one of which is nodular and situated at the base 

 of the fourth antero-lateral tooth, and three of which are surmounted 

 by broad transverse ridges ; of the three ridges the anterior is in a line 

 with the third lateral marginal sinus, the second ridge is in a line with 

 the fourth sinus, while the third is posterior to the last marginal tooth. 

 Front not very prominent, but projecting beyond the inner angle of 

 the orbit, from which it is separated by a notch ; bilaminar, the lobes 

 with a slightly concave margin, and most prominent at the inner end. 

 Antero-lateral border cut into four well-marked teeth besides the orbital 

 angle ; the first tooth is blunt and situated below the level of the orbital 

 tooth, with which it is connected by a blunt superior ridge ; the re- 

 maining teeth are acute, the third and fourth very prominent. Lower 

 surface of carapace, edges of upper surface of arm and edges of legs 

 hairy, especially the lower edge of the propodus of the last pair. 



Chelipeds very unequal in the male. Upper and outer surface of 

 wrist deeply dimpled or wrinkled ; a strong tubercle at inner angle of 

 wrist. Hand with blunt longitudinal carinae, two on the upper mar- 

 gin and three on the outer surface. The upper carina of the outer 

 surface is broad and has a row of deep pits or dimples ; the lowest 

 carina is at the inferior third of the outer surface and is continued 

 along the upper margin of the thumb. The upper part of the inner 

 surface is also pitted. The entire surface of the chelipeds as well as 

 of the carapace is finely and closely granulate and irregularly punctate. 

 The fingers are carinated, the lower carina on the outer surface of the 

 thumb is continued one third the length of the palm. The fingers are 

 black and the color of the thumb is extended on the palm, ending in 

 a zigzag line. The fingers of the large hand gape widely, those of 

 the small hand slightly ; dactylus of large hand with two large teeth 

 and a small intermediate one ; pollex with two large teeth ; tips broadly 

 hollowed out, fingers of small hand with wavy margins. Ambulatory 

 legs flattened, and more or less granulate, the granules fine and form- 

 ing rugae. Carpal and propodal joints with a longitudinal groove. 

 Dactylus furred along the edges as far as the nail. Abdomen of male 

 five-jointed. 



Dimensions. — Length 13. i mm., width. 20.4, fro nto-orbital width 

 1 1. 8, width of front 5.5. 



Type Locality. — Black Bight, Albemarle Island, January 9, one 

 perfect male, type ; also a badly damaged remnant of a smaller male 

 (U. S. Nat. Museum Cat. No. 24S31). 



Additional Locality. — Reef north of Tagus Cove, Albemarle Island, 

 March 16, the lesser cheliped of a small specimen. 



