16 DR. W. T. CALMAN ON A COLLECTION OF 



PiLTJMNUS SEMINUDTJS, MierS. 



Pilumnus seminudus, Miers, Rep. Voy. ' Alert/ Crust, p. 222, pi. xxi. fig. C. 



Two female specimens, measuring about 6-25 mm. in length. Though little more than 

 half the size of Miers's type specimen they agree very closely with it. In one individual 

 the antero-lateral teeth are much less prominent than in the type, and the middle tooth 

 of the right side is wanting. In hoth specimens the pubescence on the front part of the 

 carapace is less developed, and there are a few longer hairs in a transverse row in front 

 of the protogastric region. The species bears a considerable resemblance to the 

 Psmdozius di>ipar referred to above, and perhaps the two should not be geneiically 

 separated. 



LocaUtij. " Mabuiag." 



PiiiTJMNTJS LANATUS (Latr. ?), Miers. 



Pilumnus lanatus (Latr.), Miers, Rep. Voy. ' Alert,' Crust, p. 220, pi. xxi. fig. A. 



A number of small and probably immature specimens are all but identical with tlie 

 ' Alert ' specimens described under this name by Mr. Miers. The close pubescence 

 covering the body and limbs ends abruptly on the outer surface of the larger chela along 

 a diagonal line drawn from the base of the dactylus above to the proximal angle below, 

 the rest of the surface being smooth and polished. The antero-lateral teeth are smaller 

 than in Miers's figure, the last tooth in particular being much reduced. A small, but 

 distinct, sub-hepatic tubercle is present, the upper surface of the carapace is shghtly 

 uneven in front, and there is a well-marked tubercle on the hepatic region above. The 

 chelge are rather shorter, the lower finger is not hooked at the tip as in Miers's figure, 

 and I cannot detect the spinules which he describes on the carpus of the ambulatory 

 legs. 



Locality. " Torres Straits." 



Pilumnus longicoknis, Hilgd. 



Pilumnus longicornis, Hilgendorf, Monatsb. Akad. Berlin, 1878, p. 794, pl.i. tigs. 8, 9 ; var., Miers, Rep. 

 'Challenger' Brachyiua, p. 157; Alcock, Journ. Asiatic Soc. Bengal, Ixvii. (2) p. 193 (1898). 



A male specimen is referred with some doubt to this species. The carapace measui-es 

 17 mm. in length and 23 mm. in breadth (exactly the dimensions of Ililgendorf's 

 specimen), is strongly arched in the front part in an antero-posterior direction and 

 slishtly so from side to side. The three antero-lateral teeth are very prominent and 

 conical, the second and third with spiniform points curved forwards. The acute sub- 

 hepatic tuhercle, though small, is visible from above, causing the antero-lateral margin 

 to appear four-toothed. The external orbital angle is produced into a small triangular 

 tooth. The postero-lateral margin is longer than the antero-lateral, and is slightly 

 concave owing to the prominence of the last pair of antero-lateral teeth. The ^hole 

 surface of the carapace bears scattered and rather coarse granules, only some of the 

 broad, shallow, inter-regional grooves being smooth. The setae covering the carapace are 

 rather thick-set and moderately long, springing in pencils of four ur five, of which one 



