REPORT ON THE STOMATOPODA. 93 



In this larva, which is 1 inch long, the carapace makes, with the rostrum, -^^, the 

 exposed hind body 1^0%. ^-nd the telson ~^^q of the total length. 



Even if the close resemblance between this larva and the one from which Faxon 

 reared a young Sqitilla empusa did not indicate that Alima bidens is also a Squilla, 

 this could be inferred with great certainty from the examination of the larva itself, since 

 it resembles the adults of this genus in the presence and in the small number of spines 

 on the inner edge of the dactylus of the raptorial claw, in the depression and width of the 

 hind body, in the presence of a median-dorsal carina 011 the carapace and on the telson, 

 in the presence of acute spines on the postero-lateral angles of the abdominal somites, in 

 the presence and in the small number of marginal spines on the outer edge of the proximal 

 joint of the exopodite of the uropod, in the relative length of the two spines of its ventral 

 process, in the presence of a secondary tooth on the outer edge of the inner and longer 

 spine, in the relative positions of the marginal spines of the telson, in the presence of a 

 single minute dentation inside the base of the lateral, and a number of dentations (more 

 than three) between the intermediate and the submedian. While it is true that there 

 are some adult Squillse which do not shew all of these characteristics, and while no one 

 of them is in itself perfectly diagnostic, it is also true that there are no Stomatopods in 

 which they are all united except members of the genus Squilla, and we may therefore 

 decide, with all the certainty which is possible in absence of direct proof, that Alima 

 bidens is the larva of one or perhaps of two species of the higher carinate Squills. 

 The presence of three secondary spines on the inner edge of the postero-lateral 

 spine of the carapace of Claus's larva, and of only two in our specimen, possibly corre- 

 sponds to a specific difference between the adults. 



Alima macrophthalma. — The Challenger collection contains a number of specimens of 

 an Alima larva of a type which is quite different from that of which Alima gracilis is 

 an example, and I have selected from a surface gathering, made near Cape Howe, the 

 series which is shown in PL VII. figs. 1-6 ; PI. VIII. figs. 1-3. 



It is possible that these are not all of one species, but the differences between them 

 are so slight that, if not the same, they must at least belong to adults which are 

 very closely related, and as I am not able to identify the larva with any of the published 

 descriptions, I propose for it the provisional name Alima macrophthalma, on account of 

 the great size of the eyes as compared with the very small eye stalks. 



The youngest larva which I have found, No. 1, is essentially like No. 2. The telson 

 is shown in PI. VII. fig. 2 ; No. 2, which is shown in PI. VII. fig. 1, is 4-^ mm. long ; 

 No. 3, shown in fig. 4, is 6^ mm. long; No. 4, shown in fig. 5, is 83^*0 mm. long; 

 No. 5, shown in PI. VIII. fig. 1, is Sj^jfj mm. long; No. G, shown in fig. 2, is ll^^,\)-mm. 

 long, and No. 7, shown in PL VIII. fig. 3, is 19 mm. long. 



The most prominent diagnostic characteristics of Alima macrophthalma are as 

 follows. The eye-stalks are very short, and the eyes large with very broad tips ; the 



