42 



Memoirs of the Indian Museum. 



[Vol. IV, 



Carinae. 

 Submedian 

 Intermediate 

 Lateral 

 Marginal . . 



Abdominal somites. 



6. 

 (i) (2), 3, 4. 5, 6. 

 i,2, 3,4, 5,6. 

 i, 2, 3.4, 5- 



In addition , on the posterior margin of the fifth abdominal somite between the 

 submedian and intermediate carinae, there is a small group of one to four spines. 

 These spines do not occur in any other species of Squilla. 



The dorsal surface of the telson is finely rugose, but is otherwise almost smooth 

 on either side of the median crest. Faint traces of symmetrical rows of pits are occa- 

 sionally visible. The six marginal teeth are well developed and the submedian pair 

 possesses movable tips. On the inner face of the submedian spines there is a broad 

 lobe which is sometimes separated from the spine by an incision and so becomes a 

 submedian denticle. The intermediate denticles vary in number from nine to twelve 

 and there is one lateral. The praelateral denticle is absent. 



The inner margin of the ventral process of the peduncular segment of the uropods 

 is finely serrate. The lobe on the outer edge of the longer spine is large in the two 

 specimens examined ; but, according to Bigelow, is proportionately small in very large 

 examples. 



Both the individuals in the Indian Museum are female. According to Bigelow 

 there are no marked secondary sexual differences. 



Squilla armata seems to be an isolated form and does not appear to possess- any 

 close affinity with any other species of the genus. 



The two specimens examined are registered as follows : — 

 ^ 9 New Zealand. Chas. Chilton. 2 ? , 64 and 80 mm. 



The species is restricted to southern latitudes. It has been recorded from the 

 Gulf of St. George on the Atlantic coast of Patagonia, from Cape Horn and from the 

 Pacific coast of Patagonia and Chili (Milne-Edwards, Nicolet, Bigelow) and in these 

 localities Bigelow notes that it is found between 51 and 122 fathoms. It is also known 

 from New Zealand (Kirk, Chilton), from New South Wales (Whitelegge) and from 

 S. Africa, off Cape Point Lighthouse, in 45 fathoms (Stebbing). 



12. Squilla scorpio, Latreille. 

 Plate II, fig. 30. 

 Squilla scorpio, Latreille, Encycl. Method, X, p. 472. 

 Squilla scorpio. H. Milne-Edwards, Hist. Nat. Crust., II, p. 522. 

 Squilla scorpio. White, List Crust. Brit. Mus., p. 84. 

 Squilla scorpio, De Haan, in Siebold's Fauna Japonica, Crust., p. 221. 

 Squilla scorpio, Miers, Ann. Mag. Nat. Hist. (5), V, p. 18, pi. ii, fig. 7. 

 Squilla scorpio, de Man, in Weber's Zool. Ergebn. Nied. Ost-Ind., II, p. 518. 

 Squilla scorpio, Henderson, Trans. Linn. Soc. Zool. (2), V, p. 453.1 

 Squilla scorpio, Bigelow, Proc. U.S. Nat. Mus., XVII, p. 510. 

 Squilla scorpio, Lanchester, Proc. Zool. Soc, II, p. 554. 



