NO. 2185. NEW PHILIPPINE CRABS— RATHBUN. 551 



horns are straight, the basal antennal segment has a tooth at its 

 middle, and the carapace is differently ornamented. 



PHALANGIPUS FILIFORMIS, new species. 



fLeptoptis longipes Milne Edwards, Cuvier's Regiie Aniia., Crust., atlas, pi. 34, 

 fig. 1. 



Type-locality.— Eii^i of Leyte : Tacbuc Point, S. 80° W., 15.2 miles ; 

 lat. 10° 46' 24" K; long. 125° IC 30" E.; 57 fathoms; Sh.; July 29, 

 1909; station 5478, Albatross. 



Holotype.— Male. Cat. No. 48223, U.S.N.M. 



Measuretnents. — Length of carapace on median line, 22.2; length 

 of horns, 1.4; width of carapace, 21; length of cheliped, 53.5; length 

 of first ambulatory leg, 166.5. 



The spines of the carapace are placed as in P. hcrhstli'^ but they 

 are slenderer and sharper. The front of the carapace is equally 

 wide, measured between the tips of the anterior and well-developed 

 spines of the preorbital hoods and between the posterior extremities 

 of the hoods. Rostral horns slender, their outer margins divergent. 

 On either side of the very sharp tooth of the upper and the lower 

 margin of the orbit there is a U-shaped sinus. Pterygostomian spine 

 very long, acuminate, a smaller spine behind it. A laminar projec- 

 tion on the first abdominal segment occupies nearly its whole width 

 and is pointed at the middle; sixth segment armed with a spine near 

 the distal end. The two pairs of spines on the sternum at the base of 

 the chelipeds are well developed and acuminate. 



Chelipeds slender, the merus more so than the merus of the ambu- 

 latory legs ; manus subcjdindrical, but widening a little distally ; the 

 fingers gape narrowly in their basal half where the margins are 

 wavy, not toothed. 



Relationship. — In P. herhstii the outer margins of the preorbital 

 hood are oblique, not parallel ; the outer margins of the rostral horns 

 are subparallel ; the tooth on the lower margin of the orbit is wider ; 

 the pterygostomian spine is shorter; the prominence on the first ab- 

 dominal segment is much smaller, the sixth segment is unarmed; the 

 chelipeds are stout, the manus of the male much swollen, the dactylus 

 has a large basal tooth in the gape ; the ambulatory legs are a little 

 stouter and much shorter. 



^ Egeria Jicidstii Milne Edwards, Hist. Nat. Crust., vol. 1, 1S"A, p. 202. Not Cancer 

 longipes Linna;u<s, Syst. Nat., ed. 10, vol. 1, 1758, p. 629, which is undetermined. 



