142 



The larger chelipcd, which alone is present in the unique specimen, is as 

 long as the abdomen : more than three-fourths of its length is contributed by 

 the enormously enlarged hand, all the other joints being excessively slender. 

 The dactylus, which is longer than the fixed finger, is about half the length 

 of the palm : it has one tooth at its basal end and the fixed finger has two, 

 but the socket in the fixed finger and the plug-like tubercle of the dactylus that 

 fits into it, which are present in most species of Alpheus, are entirely wanting. 

 The palm is grooved along the inner aspect of the upper border up to a terminal 

 notch behind the finger-joint. 



The 2nd pair of legs reach to the base of the fingers of the larger 

 eheliped. 



The gills are in all respects typical phyllobranchiae. 



The unique specimen has the carapace 6 millim. long and the abdomen 12 

 millim., measured in the middle line. 



Arabian Sea, off the Travancore coast, 430 fathoms. 



Regd. No. ~ (Type of the species). 



STENOPIDEA, Spence Bate. 



Spenco Bate, Challenger Crust. Macrura, p. 206 : Stebbing, Hist. Crust., p. 211 : Ortmann, in Bronii's Thier- 

 Keich, Malaoostraoa, p. 1134. 



The pleura of the 1st abdominal somite are not overlapped by those of 

 the 2nd. 



The incisor portion of the mandible is separated from the molar portion by 

 a groove : the endopodite (palp) of the mandible is not foliaceous. 



The coxopodite of the 2nd maxillae is cleft into two lobes, which though of 

 unequal size are equally prominent towards the middle line of the body. 



The endopodite of the 1st maxillipeds is short and articulated. 



The last joint of the 2nd maxillipeds is a distinct dactylus, articulating 

 end-on with the distal end of the propodite. 



The external maxillipeds are distinctly seven-jointed. 



The first three pairs of thoracic legs are chelate, the 3rd pair being the 

 longest and stoutest. 



The endopodites of the abdominal appendages have no internal appendix 

 at their base. 



The branchiae are trichobranchiae. 



The ova when laid are attached to the abdominal appendages of the 

 female. 



