Ti8 Records of the Indian Museum. [Vol. X, 



segments ; the merus in the larger example is divided into 

 eight segments and there are traces of sub-division in the ischium. 

 The last carpal segment, the palm and the dactylus are almost 

 equal in length. 



The last three peraeopods are longer than in H. vittata or 

 H. kiikenthali. Those of the third pair reach beyond the antennal 

 scale by the whole length of the carpus, propodus and dactylus; 

 the fourth reach beyond the same point b}^ the length of the last 

 two segments and the fifth by the dactylus and one-half of the 

 propodus. The usual spines are found on the ischium and merus ; 

 in the third peraeopod there are two or three on the former 

 and four on the latter. The dactylus in all three pairs is slen- 

 der and curved and nearly one-third the length of the propodus. 

 It bears a few very slender spines close to the base, but other- 

 wise is wholly unarmed, offering a striking contrast to the same 

 appendage in H. vittata (cf. figs. 5 and 8). 



In the proportions of the abdominal somites and in the 

 characters of the telson and uropods H. denlata does not present 

 any noticeable difference from its allies. 



Two specimens are preserved in the Indian Museum : — 



1630 Off M. of Irrawaddy R., is^2o' ., .-.•/-> . xvpu 



' ^. , -^r ' Investisrator. One, ^1 mm. 1 \ FK. 



N., g4°55' E., 20 fms. *= ' '^"^ 



?^J-^ False Point, Harbour, Orissa, , , .■ . • r\ o 



' Ti r Ti 1 ' Investiorator. One, 18 mm. 



Bay of Bengal. ^ 



The colour of the species in life, according to a note found in 

 the bottle containing the smaller specimen, is as follows: — ''Cara- 

 pace and abdomen striped pink. Antennae and antennules pink. 

 Thoracic appendages light pink." 



Hippolysmata ensirostris, sp. nov. 

 Plate VII, figs. 1—4. 



The carapace, measured dorsall}^ from the back of the orbit 

 to the posterior margin, is a little less than half the length of 

 the abdomen, excluding the telson. The branchiostegal walls 

 are smooth in some specimens, in others punctate, sometimes 

 rather closely so. The pter3'gostomian spine is prominent and 

 is as large as the antennal (fig. i). 



The rostrum (figs, i, 2) is always longer than the carapace 

 and in some specimens (presumably those in which it has escaped 

 fracture throughout the animal's existence) is fully twice the 

 length. Dorsall}' it bears from 11 to 16 teeth, of which the 

 posterior 7 to 12 form an elevated basal crest, extending on to 

 the carapace. The teeth on this crest diminish in size from before 

 backwards. In front of the crest there are scarcely ever more 

 than five widely separated teeth on the upper edge of the blade. 

 The inferior margin is arm.ed with 7 to 16 stout teeth which are 

 close-set proximally. The rostrum is a little depressed basally ; 

 but, after passing the second segment of the antennular peduncle, 



