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



side, six marginal spines ; denticles 5-6, 11-12, and 1." For further details Bigelow's 

 long and detailed description should be consulted. 



Squilla mantoidea is probably, as Bigelow has suggested, a near ally of' the Medi- 

 terranean S. mantis ; the mandibular palp, however, has not been examined. From 

 all Indo-pacific species with a single lateral process on the fifth thoracic somite it is 

 easily distinguished by (1) the sharp anteriorly-bifurcated carina of the carapace and 

 (2) by the large eyes with the cornea set transversely on the stalk. 



S. mantoidea is known only from a single specimen, a female 120 mm. in length, 

 from Borneo (Bigelow). 



14. Squilla leptosquilla, Brooks. 



1886. Squilla leptosquilla, Brooks, Voy. H.M.S. 'Challenger,' XVI, Stomatop., p. 30, pi. i, 



figs. 1, 2. 

 1894. Squilla leptosquilla, Bigelow, Proe. U.S. Nat. Mus., XVII, p. 510. 

 1899. Squilla leptosquilla, Alcock and Anderson, Ann. Mag. Nat. Hist. (7), III, p. 292. 

 1904. Squilla leptosquilla, Jurich, Stomatop. deutsch. Tiefsee-Exped. , VII, p. 370, pi. xxv, 



figs. 1, 2 (including var. dentata, p. 372). 



The dorsal surfaces of the carapace and abdomen are finely rugose, but when 

 dried appear polished. The carapace measured behind the antero-lateral angles is 

 considerably less than half its median length. The median carina is clear and distinct 

 in front of the cervical groove, but is absent anteriorly for about half the distance in 

 front of the small dorsal pit. The intermediate and lateral carinae are sharp and very 

 conspicuous and the lateral margin is not angled posteriorly. Antero-laterally the 

 carapace is produced as a short spine that reaches nearly as far as the level of the 

 rostral base. 



The rostrum is a trifle longer than wide and reaches to the base of the ophthalmic 

 somite. The lateral margins, which are not upturned, are rounded and converge to a 

 subacute apex. In the middle of the dorsal surface there is a short but distinct median 

 longitudinal carina. 



The eyes are rather small. The breadth of the cornea is about equal to the greatest 

 length of the whole organ and the corneal and peduncular axes are very oblique. The 

 antennular peduncle is as long as the rostrum and carapace combined. The two basal 

 segments of the antennal endopodite are short and do not reach to half the length of 

 the scale. 



There is no palp on the mandible. 



The outer inferior margin of the mer us of the raptorial claw is broadly rounded. 

 The carpus is grooved and ridged externally and the carina on its dorsal aspect is 

 entire and terminates acutely close behind the distal margin. The outer end of the 

 propodus is a little broader in the male than in the female and the pectinate margin is 

 rather noticeably sinuous. The dactylus bears four slender teeth including the apical 

 one and its outer margin is evenly convex in both sexes and projects as a small but 

 prominent lobe near the articulation of the propodus. 



The last four thoracic somites possess well-marked submedian and intermediate 



