4,48 ■ DE. J. G. DE MAN ON CEUSTACEA CHIEFLY 



what compressed, conical tooth. The ischium- and the merns-joints are closely beset 

 with minute spinules, which are a little larger on the lower border ; carpus and palm 

 are also everywhere covered with similar minute spinules, but the larger spinules of the 

 lower border of the merus are wanting. The fingers are devoid of spinules, except a 

 few at their base. 



The three following legs are moderately slender ; those of the third pair reach to the 

 distal end of the antennal scales, the fourth are a little shorter, and the fifth extend but 

 little beyond the middle of the scales. The merus-joint of the third pair is somewhat 

 spinulose and setose on its lower border ; on the two following legs the spinules and setae 

 become gradually less numerous ; the rest of the surface is nearly smooth. The carpo- 

 and propodites are also nearly smooth, but the latter are spinulose on their lower border. 



Tal. altifrons, Hend., differs by the more numerous teeth on the upper border of the 

 rostrum, which has a different form, being vertically deep and having the apex placed 

 in the same horizontal line as the surface of the carapace. The second legs are practically 

 cylindrical, have a slenderer form, and the fingers are shorter than the palm. 



Ful. scahriculus. Heller, is also distinguished by the more numerous teeth of the some- 

 what longer rostrum, six of which are placed on the carapace. The carpus of the second 

 legs is not shorter than the raerus, and the fingers are much longer than the palm. 



Pal. latimamts, v. Mart., finally, of which a male 75 mm. long, from the Island of 

 Halmahera, is lying before me, differs also by its vertically deeper and longer rostrum ; 

 the telson has a slenderer shape, and the characters of the second legs are different. 

 The carpus, indeed, is much thinner at its base, its shape being thus quite different ; the 

 fingers are shorter than the palm, their cutting-edges shorter, their teeth much more 

 numerous ; the palm, finally, is distinctly broader than the carpus. 



These three species show, however, no doubt, still other differences of less importance. 



D.— THURSDAY ISLAND, TORRES STRAITS. 



PEN.EUS (Pen^us) latisulcatus, Kishinouyc, var. ? (PI. 33. fig. 69.) 



Pcnceus latisulcatus, Kishiriouye, in Joum. Fish Bureau, Tokyo, vof. viii. no. I, 1900, p. 12, pi. 2. fig. 2, 

 pi. 7. fig. 2 A. 



One female, dredged in 5 fathoms. May 21st, at Thursday Island, Torres Straits. 



This specimen agrees pretty well with Kishinouye's description of Pen. latisulcatus 

 from Japan, except as regards the thelycum. This female is 87 mm. long from the tip 

 of tlie rostrum to the end of the telson. The rostrum reaches to the middle of the third 

 joint of the antennular peduncle and is armed above with ten teeth, below with one ; the 

 first tooth, which stands just before the middle of the carapace, is a Little more than 

 twice as far from the second as the second from the third, and the distance of the 

 foremost tooth from the tip is but little shorter than that between the two first teeth. 

 The distance (12-8 mm.) behind the posterior tooth is a little more than once and a 

 half as long as that (7"75 mm.) from this tooth to the orbit. The first four teeth are 

 on the uj)per surface of the carapace, and the fifth is situated just above the orbital 



