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



6. Pseudosquilla empusa (De Haan). 



1844 ? Squilla empusa, De Haan, in Siebold's Fauna Japoniea, Crust., atlas, pi. li, fig. 6. 



1849. Squilla empusa, De Haan, ibid., text, p. 224. 



1880. Pseudosquilla ? empusa, Miers, Ann. Mag. Nat. Hist. (5), V, p. 113. 



1884. Pseudosquilla empusa, Miers, Voy. H.M.S. ' Alert,' p. 567. 



1894. Pseudosquilla ? empusa, Bigelow, Proc. U.S. Nat. Mus., XVII, p. 499. 

 The rostrum is broadly truncate in front, almost three times as wide as long and is 

 impressed in the middle. The cornea of the eyes, according to De Haan 's description 

 is scarcely wider than the middle of the stalk ; in the figure, however, it appears to be 

 considerably broader. The raptorial dactyli bear three teeth including the terminal 

 one. 



The thorax and first five abdominal segments have the same form as in P. ciliata. 

 The sixth somite is furnished with six indistinct carinae ; the submedian and inter- 

 mediate carinae do not terminate in spines. On the telson there is a median carina, 

 a pair of submedians, one pair of laterals and perhaps also a pair of marginals. The 

 six large marginal teeth are broad and flattened ; De Haan does not state that the sub- 

 medians are movable, and the feature is not apparent in his figure. The basal process 

 of the uropods terminates in two large teeth, the outer longer than the inner. In addi- 

 tion there is one stout tooth, and possibly a series of smaller teeth also, on the internal 

 margin of the process. 



Pseudosquilla empusa has not been rediscovered since it was originally described 

 b} r De Haan. The type specimen, about 83 mm. in length, 1 is recorded from Japan. 



7. Pseudosquilla dofleini, Balss. 



1910. Pseudosquilla dofleini, Balss, Abb. math.-phys. Klasse k. bayer. Akad. Wiss., Suppl., Bd. II, 

 Abh. 2, p. 7, text-fig. 1. 



The principal characters of this species are as follows : — 



The rostrum consists of a short basal part with rounded lateral margins and a 

 strong median spine. The cornea of the eyes is greatly expanded, much wider than 

 the stalk and is set obliquely. The dactylus of the raptorial claw is furnished with a 

 tubercle at the base of its outer edge ; it bears three teeth, the terminal one long, the 

 other two much shorter. 



The lateral margins of the last three thoracic somites are rounded. The postero- 

 lateral angles of the fifth abdominal somite are spinous, those of the four preceding 

 somites, though sharply angled, do not bear spines. The last somite has six longitu- 

 dinal ridges, terminating in spines, as in P. ciliata. On the telson the full number of 

 carinae are present, five on either side of the median keel. The intermediate carinae 

 are continued to the apex of the submedian spines, the first laterals stop close behind 

 the base of the intermediate teeth and the second laterals are coterminous with the 

 lateral teeth. 



The basal process of the peduncular joint of the uropods bears a row of small teeth 



1 There is reason to believe that De Haan' s figure represents his specimen at its full size. 



