BBACHTURA FROM TOERES STRAITS. 17 



is genei'ally much longer than the rest. The front is much tleflexed, the inner lohcs 

 broadly rounded, the outer small and spiniform. The upper orbital margin has two 

 hardly visible fissures, and is, like the lower margin, only faintly granulated. The 

 internal angle of the lower margin is acutely rounded. The sub-hepatic region bears a 

 few" granules near the outer margin besides the sub -hepatic tooth. The merus of the 

 chelipeds has a stout blunt tooth near the distal end of its upper margin. The carpus 

 has a number of granules on its outer surface, which is clothed with long setae, and there 

 is a sharp tooth at its inner angle. In the hand of the larger cheliped the greatest 

 breadth is about equal to the length of the palm measured in the middle line, and the 

 dactylus is about three-fourths of this length. The whole outer surface of the palm 

 bears longitudinal rows of acute granules, with one or tw^o smaller granules scattered in 

 the rather wide interspaces between the rows. On the upper margin some of the 

 granules become spiniform, and the whole surface bears numerous rather long setfe, 

 which extend with the granulation on to the bases of both fingers. The fingers are slightly 

 furroAved. The merus of the ambulatory legs has the upper edge terminating distally in 

 a spine, behiiid which there is a notch running down on both faces of the joint as a 

 short groove. 



From Hilgendoi'fs accou.nt our specimen differs in the rather more concave postero- 

 lateral margins; in the more prominent sub-hepatic tooth (" nur angedeutet ") ; in the 

 much less distinct granulation of the orbital margins ; and in having the whole outer 

 surface of the hand covered with granules and setfe. The granules on the surface of 

 the carapace also aj)pear to be more numerous. Unfortunately both antennal flagella 

 are wanting in our specimen. The regions of the carapace are not so distinctly marked 

 as in Hilgendorf's figure, but they appear to be similarly disposed. The tooth on the 

 distal end of the merus of the ambulatory legs is not indicated by Hilgendorf. 



The ' Challenger ' specimen described by Miers, and regarded by him as a variety of 

 this species, differs from the type and agrees with our specimen in the characters of the 

 orbital margin, of the larger cheliped, and of the ambulatory legs. The sub-hepatic 

 tooth, however, is said to be deficient and the chelipeds are nearly equal in size. 



P. Sluiteri of De Man (Weber, Reise Niederl. O.-Ind. ii. p. 283, pi. i. fig. 2, and (as 

 P. ForskaUi, M.-E.), Arch. Naturg. liii. (1) p. 295, pi. xii. fig. 1) is a closely allied species, 

 but differs in the less prominent antero-lateral teeth and more granulated caraj>ace, and 

 in the absence of the notch and tooth on the merus of the ambulatory legs. P. scabri- 

 iisciiliis, Ad. & Wh. (Zool. Voy. ' Samarang,' Crust, p. 44, pi. ix. fig. 5) has the antero- 

 lateral teeth less prominent, wdde, and denticulated. 



Locality. " Fringing reef, Mer, Murray Island." 



Distribution. E. Africa (Inhambane, Hilgendorf), to Tongatabu (Jflifrs). 



PiLTJMNUS CKiSTiPES, n. sp. (Plate 1. figs. 1-3.) 



Carapace closely covered with a short fur, which does not conceal the ratlier prominent 

 regional areolte. On removing the fur, a few scattered granules are seen, each bearing 

 a tuft of short hairs. The front part of the carapace is strongly convex in an antero- 



SECOND SERIES. — ZOOLOGY, VOL. YIII. 3 



