51 



Squilla inornata, spec, nov, 

 Species name in allusion to the unornamented telson. 

 Carapace with the base much arched, the postero-lateral 

 angles rounded and backward produced, sides slightly excavated, 

 front margin sinuous, the antero-lateral angles are armed with 

 a short spine ; median longitudinal diameter, ol, breadth of 

 base, '4, breadth of front, •125 inch. There are three longi- 

 tudinal carinap, which are interrupted by the distinctly marked 

 cervical suture, posterior to which, the median carina is 

 bipartite anteriorly and terminates in a spinule. 



Rostrum oblong, a little longer than wide, with the lateral 

 margins slightly raised, there is no median ridge ; it reaches to 

 the base of the ophthalmic segment. 



The exposed thoracic and first six abdominal segments are 

 ornamented with six longitudinal carinae ; all the carina3 of the 

 fifth and sixth, the laterals of the fourth, and the inferior 

 laterals of the third and second abdominal segments terminate 

 in spinules; the postero-lateral angles of the first five abdominal 

 segments spinulose. 



The telson is smooth on its upper surface, but is provided 

 with a median crest ending in a spinule ; its margin is pro- 

 longed into two submedian spines and two laterals on each 

 «ide. The deep notch between the submedian spines has on 

 each side four blunt denticulations ; between the submedian 

 and superior lateral spines there are eight comb-like denticu- 

 lations. 



The distal prolongation of the basal part of the uropoda is 

 armed on the inner edge with minute serratures, and ter- 

 minates in two unequal spines, the inner one of which is the 

 longer and is armed with a spinule on its outer edge. 



The dactyli of the raptorial limbs have six spines, the 

 terminal one half the length of the joint. The penultimate 

 joint much compressed, its anterior edge denticulated through 

 its length ; a few mobile spines arise from the marginal groove. 



The appendages to the thoracic limbs are styliform. The 

 lateral processes of the exposed segments are bilobate ; the 

 anterior lobe of the first of the exposed segments is elongated, 

 curved forward, and acute ; in those of the second, third, and 

 fourth exposed segments the posterior lobe is the larger. 



Length of body, two and a half inches. 



Colour in spirit, greenish-brown. 



Locality. — St. Vincent's Gulf {S. Atist. 3Ius., two examples.) 



In general appearance S. inornata resembles S. Diifresnii, 

 Miers (loc. cit., t. 2, f. S), but differs in the pectinated 

 margin of the penultimate joint of the raptorial limbs, in the 

 shape of the rostrum, and in the lateral processes of the ex- 



