16 BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



RANINOIDES NITIDUS A. Milne Edwards 



Plate 2, Figures 1, 2 



Raninoides nitidus A. Milne Edwards, Bull. Mus. Comp. Zool., vol. 8, p. 34, 

 1880 (type locality, off Grenada, B. W. I.; type not located). — A. Milne 

 Edwards and Bouvier, Mem. Mus. Comp. Zool., vol. 47, p. 298, pi. 2, 

 fig. 1; pi. 3, fig. 1, 1923. 



Diagnosis. — Front with three prominences, a triangular rostrum 

 and a postocular spine on either side. Two spines behind the post- 

 orbital angle. 



Description. — Rostrum elongate, postocular spine slender, slightly 

 divergent, and nearly as long as the rostrum. One short orbital sinus. 

 Lateral margins arcuate ; the posterior of the spines corresponds to the 

 lateral spine of R. loevis, but is situated much farther back, nearly to 

 the widest point of the carapace; the anterior spine short, broad, and 

 dentiform. Carapace glossy but with large punctae; cardiac region 

 outlined. Ocular peduncles short, massive, one and one-half times as 

 long as wide, not reaching end of rostrum or distal border of orbital 

 spine; cornea large, ovoid, extending chieflj on the ventral side. Only 

 one spine on wrist; manus unarmed above, three sharp teeth below 

 near the fixed finger, the cutting edge of which has only two or three 

 blunt prominences; mobile finger flat. Ambulatory legs as in R. 

 loevis. Antennules and antennae unarmed; the flagellum of the 

 latter is scarcely longer than the peduncle. Merus of outer maxilli- 

 peds a little longer than ischium; the following articles are much 

 reduced. 



Measurements. — Type male, length of carapace 8, width 4.5 mm. 



Range. — Known only from the type specimen from off Grenada, 

 B. W. I.; 159 fathoms; temperature 53.5° F.; 1878-79; Blake (where- 

 abouts unknown). 



RANINOIDES FOSSOR A. Mllne Edwards • 



Plate 2, Figures 3-5 



Raninopsis fossor A. Milne Edwards, MS. 



Rfininoides fossor A. Milne Edwards and Bouvier, Mem. Mus. Comp. Zool., 



vol. 47, p. 300, pi. 1, fig. 10; pi. 2, figs. 2, 3, 1923 (type locality unknown; 



type in Paris Mus.). 



Diagnosis. — Distance between rostrum and next tooth greater than 

 length of tooth. Spine of wrist rudimentary. Mobile finger un- 

 unarmed. Dactyls of ambulatory legs sickle-shaped. 



Description. — Carapace wider than in other species; strongly 

 granulous on frontal region as far back as a transverse line a little in 

 advance of lateral spine. Sinuses of fron to-orbital border more 

 reduced than in R. lamarcTci. Rostrum composed of a slender median 

 spine and two short subrectangular teeth a little produced at their 



» It is not certain that this species belongs to the American fauna, but I follow A. Milne Edwards and 

 Bouvier in grouping it here. 



