94 Memoirs of the Indian Museum. [Voi,. IV, 



that this is characteristic merely of a particular stage in the development of certain 

 species. 



There is a single specimen of this form in the Indian Museum which appears to 

 belong to the same species as that described by Milne-Edwards. The chief characters 

 are sufficiently well shown in the figures (figs. 81-83) to render detailed description 

 unnecessary. 



I am inclined to agree with Hansen (1895, p. 69) that the form is in all pro- 

 bability related to one of the species of Squilla to which Miers applied the name 

 Chloridella, though the possibility of some affinity with such species as 5. fasciata, 

 S. lata and 5. scorpio cannot be overlooked. 



In the very elongated cylindrical eyes L. schmeltzii bears no resemblance to any 

 adult species of Squilla ; it is probable, however, that this feature is subject to con- 

 siderable modification during further growth. But the chief difficulty that is en- 

 countered in an attempt to discover relations between this form and any species of 

 Squilla hitherto known from the Indo-pacific region concerns the structure of the rap- 

 torial claw. The dactylus of L. schmeltzii bears seven teeth and, among species of 

 Squilla with a single lateral process on the fifth thoracic somite, this number is found 

 only in 5. armata, a species of isolated position and a peculiar distribution confined to 

 southern latitudes. 



In the present state of our knowledge it seems impossible to suggest any plausible 

 view of the relations of this form ; but it may prove considerably easier when the early 

 post-larval history of the adult species is better known. 



The single specimen in the Indian Museum is registered as follows : — 

 °~ Port Blair, A ndamans. J. Wood-Masou. ij,iimm. 



Genus Pseudosquilla, Dana. 



1837. Squilla, Squilles trapues, H. Milne-Edwards, Hist. Nat. Crust., II, pp. 518, 525. 



1837. Gonodactylus , H. Milne-Edwards, ibid. pp. 528, 530 (partim). 



1849. Squilla, sect. Paralleles, De Haan, in Siebold's Fauna Japonica, Crust., p. 22r. 



1852. Pseudosquilla (Guérin ined.) Dana, U.S. Explor. Exped., Crust., p. 621. 



1880. Pseudosquilla, Miers, Ann. Mag. Nat. Hist (5), V, p. 108. 



1894. Pseudosquilla, Bigelow, Proc. U.S. Nat. Mus., XVII, p. 498. 



Carapace little narrower in front than behind with conspicuous gastric grooves ; 

 cervical groove usually absent, never visible mid-dorsally ; no carinae on carapace ; 

 antero-lateral angles not spinous, cornea of eye rarely bilobed. Mandibular palp 

 composed of three, rarely of two, segments. Merus of raptorial claw articulating 

 terminally with ischium ; ventral surface of merus channelled longitudinally through- 

 out its length ; upper margin of propodus finely pectinate externally ; dactylus not 

 inflated at base and armed with at most three teeth excluding terminal one. Shorter 

 ramus of last three thoracic limbs linear, composed of a single segment. Free 

 thoracic and abdominal somites compressed, first five of the latter without sharp 

 longitudinal carinae. Telson with median carina and one to five pairs of additional 

 carinae; submedian, intermediate and lateral marginal teeth, well-formed, the first 



