Mr. E. J. Miers on the Squillidas. 113 



Pseudosquilla ? empusa. 



Squilla empusa, De Haan, Faun. Japon. Crust, p. 224, pi. li. fig. 6 

 (1849), nee Say. 



Body smooth, punctated. Carapace narrowed anteriorly, 

 with the antero-lateral angles obtuse, the posterior margin 

 rounded. Rostrum almost three times as broad as long, im- 

 pressed in the middle, with the anterior margin broadly trun- 

 cated. Thorax and postabdomen of the same form as in 

 P. ciliata {S. stylifera, Lam.). Lateral processes of the 

 thoracic segments with the margin rounded. Postabdomen 

 convex, unarmed ; sixth segment indistinctly six-costate, 

 with the posterior margin unispinose on each side ; seventh 

 segment with the median keel produced, with a smaller keel 

 on each side placed near to the median one, and another 

 midway between the median keel and lateral margin ; lateral 

 margin arcuate before the middle, sinuate beyond the middle, 

 with short flattened spines. Eyes scarcely broader than the 

 middle of the peduncles. Antenuules robust, with the pedun- 

 cles shorter than the antennae. Raptorial limbs with the 

 penultimate joint narrower at each end, and with the dactyli 

 and spines compressed. The distal prolongation of the base 

 of the uropoda is represented as terminating in two unequal 

 spines, of which the outer is slightly the longer. 



Hob. Japanese seas. 



De Haan founded this species on a unique example. He 

 seems to have been unaware of Say having previously 

 adopted the name of empusa for a species of Squilla. The 

 above description is taken from his work. 



** 



Rostral incite terminating in a strong spine. Antennules very robust and 

 elongated. Basal prolongation of the uropoda ending in a single ter- 

 minal and two lateral spines. 



Pseudosquilla Lessonii. 



Squilla Cerisii, Guerin, Voy. Coquille, Crust, p. 40, pi. iv. fig. 1 (1830), 



S. Isessonii on plate. 

 Squilla spinifrons, Owen, Proc. Zool. Soc. p. 6 (1832). 

 Squilla Lessonii, M.-Ed wards, Hist. Nat. Cr. ii. p. 527 (1837) ; White, 



List Crust. Brit. Mus. p. 84 (1847). 

 Squilla monoceros, M. -Edwards, Hist. Nat. Crust, ii. p. 526 (1837) ; 



Gay, Hist. Chile, Zool. iii. Cr. p. 224 (1849). 

 Pseudosquilla Lessonii, Dana, Cr. U.S. Expl. Exp. xiii. 1, p. 622 (1852). 

 ? Pseudosquilla marmorata, Lockington, Proc. Cal. Acad. Sci. p. 33 



(1877). 



Carapace narrowed anteriorly, with the antero-lateral angles 

 rather obtuse, and the postero-lateral lobes broadly rounded. 

 Rostral plate terminating in a long spine and with the lateral 



