50 



Squilla pectinata, spec. nov. 



Species name in allusion to the comb-like front margin of 

 tlie penultimate joint of tlie raptorial limbs. 



Carapace in tbe form of a truncated isosceles triangle, with 

 the sides nearly straight, and the angles rounded ; length, 

 1-05, breadth at base, "85, breadth at front, '5 of an inch ; 

 smooth, very convex in the middle, with the sulci deep and 

 prolonged to the cervical suture. Posterior to the cervical 

 suture are two lateral carinse on each side. Eostrum semi-oval, 

 as long as broad — 0'15 of an inch — partially covering the 

 ophthalmic segment. The exposed thoracic and the first five 

 abdominal segments ornamented with two submedian carinse, 

 and a lateral carina on each side. The first five abdominal 

 segments have in addition two lateral carinae inferior to the 

 first on each side ; the postero-lateral angles spinulate. The 

 sixth abdominal segment has two submedian and four lateral 

 carina?, each terminating in a strong spine. 



The telson has seven acute longitudinal crests and a few sub- 

 marginal carunculations, more or less confluent ; the median 

 crest terminates in a spine, and the crest on either side of the 

 median one has a few spinulose serrations towards the ex- 

 tremity. The margin is produced into two submedian triangular 

 spines and four lateral spines, the spaces between the sub- 

 median and the first lateral spines with about ten strong 

 serratures. The basal prolongation of the uropoda is margined 

 on the inner side with narrow and acute spines gradually in- 

 creasing in length ; the inner of its two elongated terminal 

 spines is slightly longer, and is notched on its outer margin 

 near to the extremity. 



The dactyli of the raptorial limbs have four spines, the ter- 

 minal one more than half the length of the dactylus. Penulti- 

 mate joint armed on its anterior and superior margin with 

 close set comb-like teeth ; there are a few unequal-sized mobile 

 spines in the grooved front of tlie same joint. The appendages 

 to the thoracic limbs are styliform ; the lateral processes of 

 the first exposed thoracic segment is narrow, straight, and 

 acute; those of the following are truncated laterally with 

 rounded angles. 



Length of the body, 4| inches ; greatest breadth, 1 inch. 

 The colour of the specimens preserved in spirit is pale-horn, 

 the costa? and margins of the carapace and thoracic and 

 abdominal segments dark-coloured. 



Locality. — Port Adelaide Creek and St. Vincent's Gulf {S. 

 Aust. JIus., three specimens) ; Fowler's Bay (Jlrs. A. liichanls, 

 one specimen). 



