114 



Memoirs of the Indian Museum. 



[Voi,. IV, 



away laterally before reaching the external marginal tooth. The ventral surface is 

 obscurely pitted on either side. The posterior margin of the telson is indistinctly 

 notched in the middle line and bears on each side two, three, or more usually four, 

 blunt lobes, the outermost or two outermost being generally sharper and more con- 

 spicuous than the rest. 



The inner dorsal edge of the peduncular segment of the uropod terminates in a 

 short spine. The inferior bifurcate process consists of two long spines. Each is 

 triangular in section, bearing three longitudinal grooves and three carinae ; the inner 

 is nearly twice the length of the outer and is considerably longer than the segment 

 from which it arises. The proximal segment of the exopod bears a fixed distal spine on 

 its inferior aspect and a series of eight or nine, which are movable, on its outer margin. 



In the genus Squilla marked secondary sexual characters, when present, are found 

 in the male only and differentiate large examples of that sex from females and young 

 males. In L. maculât a, however, the reverse is the case, special modifications occurring 

 only in large females. Among specimens in the Indian Museum the peculiar form of 

 the raptorial claw [ (mentioned above) is found only in a single female which measures 

 186 mm. In another scarcely smaller example (182 mm.) the raptorial teeth, though 

 somewhat reduced in size, are still well formed and there are, as usual, four movable 

 spines on the propodus. In both these females the eye is small and it seems probably 

 that this again is a special feature of large examples of this sex (cf. figs. 87 and 88). 

 The following table contains measurements of five females and seven males. It will 

 be noticed that, as in all Stomatopoda, the relative size of the eye diminishes with 

 growth and that, whereas the proportions in young females are closely comparable with 

 those of males, the breadth of the cornea in the two large females is very much less 

 than would be expected to occur in males of a similar length. 











Corneal Index. 





Total length. 



Sex. 



Length of carapace. 



Breadth of 

 cornea. 





















0" 





? 



mm. 





mm. 



mm. 









283 



d" 



53-5 



11 



4"9 







208 



0" 



39 



10 



3-9 







186 



? 



30 



6-2 







4-8 



182 



? 



32 



72 







4 - 4 



144 



<? 



27 



7'3 



37 







136 



0" 



24 



6-5 



37 







133 



0" 



225 



6-2 



3-6 







112 



0" 



20-5 



5'5 



37 







107 



? 



190 



5'4 







3-5 



100 



? 



18=5 



S'5 ' 







3'4 



95 



0" 



17-5 



5'3 



3-3 







80 

 66 



* 



14-5 



4-5 







3-2 



0" 



13-0 



4-5 



2-9 







1 De Man's suggestion that the teeth are merely worn down in large females cannot be supported, 

 for the whole form of the propodus and dactylus is altered 



2 The number of times that the breadth of the cornea is contained in the median length of the 

 carapace (see p. 9). 



