102 Records of the Indian Museum. [Vol. X 



of the antennal scale and the spinulation of the antero-lateral 

 margin of the carapace also showed extensive variation. A single 

 specimen, however, the onl}^ one which possessed two teeth on 

 the carapace (pi. Ill, fig. n) was referred without difficulty to 

 to L. gravieri, and by an attentive study of the remainder the 

 conclusion that they also must belong to that species was reached. 



It was only when these preliminary results were obtained 

 that it was noticed that all the examples referred to L. mucro- 

 natus were female, while all referred to L. gravieri were male. The 

 fact that both forms were found together at each of the two 

 localities where specimens were obtained, suggested that the con- 

 clusions derived from the form of the animal and the characters 

 of the rostrum were fallacious and a renewed study of the 

 proportional measurements of the appendages and comparison 

 with the sexual distinctions found in L. pygniaeus led to the 

 conclusions outlined in the above synonymy. 



In the female specimens (pi. IV, fig. i) the rostrum reaches 

 almost to or a little beyond the end of the antennal scale. At 

 its base it is inferiorly excavate for the accommodation of the 

 eye and in lateral view the length from the back of the orbit 

 to the apex is less than twice, often not more than one and a half 

 times the greatest height. Anteriorly the rostrum is sometimes 

 almost circular in outline, but more often it is distinctly pointed. 

 The dorsal and ventral teeth are borne only in its distal half. 



The carapace is strongly arched dorsally. It is not carinate 

 in the median line but bears, as a rule, a single stout fixed tooth 

 behind the base of the rostrum: in rare instances three or four 

 teeth (pi. Ill, fig. 8) are found in this position. There is a sharp- 

 antennal tooth and a series of small spines, usually ii — 14, on the 

 antero-lateral margin. 



The eyestalk is a trifle wider than the cornea and bears 

 a conspicuous pointed process on its inner distal aspect. The 

 antennular peduncle reaches a little beyond the middle of the 

 antennal scale and has the proportions shown in pi. Ill, fig. 

 12. The antennal scale (pi. Ill, fig. 13) is about three times 

 as long as wide. 



The outer maxillipede reaches a little beyond the antennal 

 peduncle. 



The second peraeopods reach about to the apex of the 

 rostrum. The carpus is divided into three segments, of which 

 the first and third are approximately equal, each being about 

 half the length of the middle segment. The palm is a little 

 longer than the last carpal segment and is decidedly longer than 

 the dactylus. 



The dactylus of the last three pairs of peraeopods, as in 

 L. pygmaeus, terminates in two stout claws and bears three 

 or four small spines on the posterior margin. In the fifth 

 pair the carpus is a little more than two-thirds the length of 

 the propodus. The dactylus is rather more than one-third the 

 length of the propodus. 



