444 MR. J. R. HENDERSON — A CONTRIBUTION 



Punjab is 38 mm. long. The second legs give the following measurements in the best 

 preserved examples : — 



This species, which is apparently very common in North India, exhibits considerable 

 variation in the length, form, and toothing of the rostrum. In some specimens the 

 rostrum is considerably shorter than the antennal scales, while in others it exceeds these 

 by nearly one third of its length, and is somewhat upturned distally ; the most diverse 

 forms occur, however, in the same localities, and are connected by transitional forms. 

 The upper rostral teeth vary in number from five to ten, according to the length of the 

 rostrum, but in nearly all cases two are subterminal, and tlie distance between these and 

 the proximal teeth depends upon the length of the rostrum, i. e. it is greatest in the 

 long-rostrum forms ; the lower teeth are much more constant, their number being from 

 five to seven. 



P. Bay anus belongs to that small section of Ortmann's group Bupalcemon in which the 

 carpus and merus are subequal, or the carpus only slightly longer, and it is distinguished 

 from the other species by the characters of its rostrum, second legs, and especially by the 

 peculiar ridging of the fingers. P. Malcolmsonii *, Milne-Edw. (Jacquemont's Voyage 

 dans rinde, Crust, p. 8, pi. iii. 1844), from Nagpore, has the rostrum elevated proxim- 

 ally, with a single subapical tooth, the chelipedes longer than the body, the mobile finger 

 with a velvety covering of hair, and it is a much larger species, attaining a length 

 of 155 mm. 



266. Pal^mon altifkons, n. sp. (PI. XL. figs. 4-6.) 



Delhi, three specimens ; Piver Jumna, six specimens ; Lahore, six specimens {Bay). 

 The rostrum reaches the end of the antennal peduncles, and is vertically deep, with 



the teeth "^^p^i- The upper teeth are subequal and more erect than usual, with their 

 interspaces ciliated, and the fourth tooth, occasionally the third, placed above the orbital 

 margin ; the three, or more rarely two, lower teeth are subequal in size. The upper 

 margin of the rostrum is convex, but the apex is placed in the same horizontal line as 

 the surface of the carapace ; the apex forms an acute and slightly upturned tooth. The 

 free end of the antennal scale is rounded internally. The carapace is slightly scabriculate 

 anteriorly, and the hepatic sjiine is rather small. 



The first legs have the middle of the palm opposite the end of the antennal scale. 



* This species lias, so far as I am aware, not hcen referred to since Milne-Edwards published his description, nor 

 is it included by Ortmann in Lis revision of the genus. In the characters of its rostrum it bears considerable 

 resemblance to P. Wcheri, De Man, from Celebes. 



