280 DE, J. Gt. DE MAN ON THE PODOPHTHALMOTTS 



podites are also armed with a similar spiuule, about in their 

 middle. The legs of the fourth pair reach to the distal end of 

 the antennal scales ; their meropodites also are armed with a 

 small spiue near their distal ends ; the propodites are about once 

 and a half as long as the carpopodites, and armed with a row of 

 four spinules along their inner margins. The dactylopodites 

 finally (fig. 6) have the ordinary form, being nearly straight, 

 scarcely arcuate, pointed and acute, and each is armed at its base 

 on its inner margin with a small spinule. The legs are very 

 sparsely covered with a few hairs. 



The uropoda are a little longer than the terminal segment of 

 the postabdomen, and their inner ovate rami are ciliate. 



Grenus Pal^mon, Fabr. 



155. PaljEmon cajrcinits. Fair. 



Palsemon carcinus, Fabricius, Suppl. Entom. p. 402 ; Milne- Edwards, 

 Hist. Nat. Crust, t. ii. p. 395 ; de Man, " On some Species of the Genus 

 Palsemon, Fabr.," in Notes from the Ley den Museum, i. p. 165. 



One very young specimen only was collected at Mergui. It is 

 still smaller than the specimen which I described in the " Notes 

 from the Leyden Museum," for it is only 45 millim. long from the 

 tip of beak to the end of the terminal segment. This specimen, 

 however, wholly agrees with that in Leyden, the carpopodite 

 of the second pair of legs being twice as long as the palm, and the 

 first pair of legs projecting a little beyond the ajDpendages of the 

 antennae. 



Palcemon carcinus has been recorded from the mouth of the 

 Granges, from Singapore, Sumatra, Borneo, the Philippines, Java, 

 Celebes, and Siam. 



156. Pal^mon acutieosteis, Dana. (Plate XVIII. fig. 7.) 

 Palsemon acutirostris, Dana, Unit. States Expl. Exp. Crustacea, i. p. 590, 



pi. xxxix. fig. 1, 



The collection contains seven specimens of this species, which 

 was discovered at the Sandwich Islands. Six were captured at 

 King Island, in fresh water, the seventh at Elphinstone Island. 

 The few points in which these specimens differ from Dana's 

 description in his ' Conspectus ' and from his figures (the 

 text is not at hand) are so unimportant that I do not regard 

 them as examples of any other species but P. acutirostris. 

 If, however, further research should prove that the species 



