OXTSTOMATOUS AND ALLIED CRABS OF AMERICA 57 



Description. — Body and feet everywhere bristling with numerous 

 large spines; some smaller spines in the intervals. Carapace regularly 

 convex from front to rear and transversely, sutures indistinct. Front 

 forming a beak, very advanced and deflexed; margin of front and 

 orbits furnished with a row of close-set spines. Orbits very oblique. 

 Basal article of antenna spinous, closing the orbit below; basal article 

 of antennule also spinous. The epistomian point joins the front. 

 Eyestalk spinous, two curved spines overhanging the cornea. Cheli- 

 pcds equal, short, veiy spinous outside, and with spiniform tubercles 

 within; fingers spooned, the propodal finger denticulate, the dactyl 

 with only two terminal denticles and a proximal notch. Last pair 

 of feet much reduced, chelate, not surpassing in length the merus of 

 the preceding foot. Abdomen of mature female thick, narrow, sides 

 parallel from first to sixth segment; armed with spinules and numerous 

 spines; fourth segment with a large, median lobe near anterior border, 

 which is smooth except for a longitudinal sulcus on proximal half; a 

 similar lobe, much smaller, on fifth segment; on these two articles 

 spines are scarce on median line, forming a sort of wide gutter, which 

 is continued to middle of terminal segment; lateral pieces of sixth 

 article very small. Thoracic sternum smooth, very concave, with a 

 crest a Httle inside the base of the chehpeds and the next three ambula- 

 tories; a transverse crest between the bases of second and third 

 ambulatories. 



Measurements. — Female (9547), length of carapace without spines 

 1 1 .5, with spines 12.3, width without 9.6, with spines 1 1 mm. Length 

 of holotype without rostral spine 17 mm. 



Range. — Caribbean Sea. 



Material examined. — Mexico: Off Arrowsmith Bank, Yucatan; lat. 

 20°59'30" N., long. 86°13'45" W.; 130 fathoms; Co.; January 22, 

 1885; station 2354, Albatross; 1 female (9547). 



Greater Antilles: Off Mona Island, Mona Passage; lat. 18°03'45'-' 

 N., long. 67°48'10'' W.; 240-300 fathoms; February 11, 1933; sta- 

 tion 43, Johnson-Smithsonian Expedition; 1 female, ovigerous (68165). 



Leeward Islands: Off Guadeloupe; 150 fathoms; temperature 

 59%° F.; 1878-79; station 166, Blake; 1 ovigerous female, holotype 

 (M. C. Z. no. 6509). 



Windward Islands: Off St. Vincent; 88 fathoms; temperature 

 62° F.; 1878-79; station 232, Blake; 1 carapace, paratype (M. C. Z. 

 no. 2641). 



Family HOMOLODROMIIDAE Alcock 



Homolodromidae Alcock, Journ. Asiat. Soc. Bengal, vol. G8, pt. 2, no. 3, p. 127, 

 1899. 



Carapace longer than })road, convex in both directions, the true 

 cervical and the branchial grooves present. Front cut into two 

 prominent teeth, between which, but on a much lower plane, a third 



