8 Mr. E. J. Miers on the Squillidse. 



Mainly distinguished by the sculpture of the last two post- 

 abdominal segments, which have the dorsal surface finely 

 granulated. The posterior margin of the antepenultimate seg- 

 ment, both the anterior and posterior margins of the penultimate 

 segment, and the anterior margin of the last segment are 

 armed with a series of small spinules. The terminal segment 

 is armed on its upper surface with an elevated longitudinal 

 median shield-like prominence ; its three postero-lateral mar- 

 ginal teeth are very strong and acute ; and its posterior margin, 

 on either side of the median emargination, is divided into 

 several small truncated lobules or denticles. The dactyli 

 of the raptorial limbs bear nine or ten long spines. The 

 upper surface of the basal portion of the uropoda bears several 

 unequal spinules. The coloration is similar to that of L. ma- 

 culata ; but the bluish or dusky transverse bands are (if one may 

 judge from dried specimens) narrower than in that species. 



Hob. Atlantic Region. 



Specimens are in the British Museum from Brazil (Lord 

 Stuart de Rothsay and John Miers, Esq., F.R.S.). 



Milne-Edwards records this species from the West Indies, 

 Gibbes from Charleston Harbour, South Carolina, Latreille 

 from Cayenne, and Herklots from Boutry, on the west coast 

 of Africa (as 8. Hoeveni) . 



It is probably to this species that a Squilla noticed by Dr. 

 A. Ernst (P. Z. S. 1870, p. 3), as having been captured at La 

 Guayra, Venezuela, is to be referred. 



In a dried individual which is apparently of the female sex, 

 the spines of the dactyli of the raptorial limbs are in all re- 

 spects similar to those of male individuals. 



The denticles of the posterior margin of the terminal seg- 

 ment vary greatly in size and number. Dana probably sepa- 

 rated his L. inornata on account of the differences presented 

 in this respect between his specimens and Milne-Edwards's 

 description of L. scabricauda ; but they cannot be regarded as 

 of specific value. 



Lysiosquilla Desaussurei. 



Squilla scabricauda, De Saussure, Hev. et Mag. Zool. v. p. 367 (1853) ; 



nee Latr. 

 Squilla Desaussurei, Stimpson, Boston Journ. Nat. Hist. vi. p. 503 



(1857). 



Stimpson evidently founded this species on the description 

 of M. de Saussure, who says (/. c.) that his specimens differed 

 from those of L. scabricauda in the Paris Museum in having 

 the dactyli of the raptorial limbs armed with eleven teeth (the 



