BY WILLIAM A. BASWELL, M.A., B.SC. 



995 



the propodos and dactylos of the penultimate pair being rather 

 larger than those of the last. The surface is dotted with minute 

 black specs, and there are cross bands of similar dots on some of 

 the appendages. 



With the female specimens were a number of males, the 

 majority of which differ from the female only (1) in having only 

 seven segments in the flagellum of the lower antenna? (2) in 

 having the first two pairs of pereipoda decidedly louger than the 

 others, and (3) in having the last pair rather stouter than the 

 penultimate. Among these, two, though resembling the rest 

 in other respects differ from them in the form of the propodos of 

 the posterior gnathopoda. In the first of these, which is otherwise 

 like that of the female, the joint in question is relatively longer and 

 narrower than in the latter. In the other, which I take to be the 

 only completely adult male, the propodos (PI. 48, fig. 3), is 

 narrow at the base, broadening distally, with a strong rounded 

 process at the dorsal and distal angle over the insertion of the 

 dactylos, with a deeply concave palm defined by a double tubercle 

 as in the female, with a quantity of fine hairs towards its middle 

 and two very minute spines near its distal end ; the dorsal process 

 is ornamented with hairs ; the extremity of the dactylos is slightly 

 hooked. 



Proto spixosa. N. sp. 



[Plate XLIX., fig. 1.] 



Diagnosis. Head without spines : three following segments each 

 with three spines ; flagellum of superior antenna? with twenty-two 

 or twenty-three articuli. Inferior antenna? equal in length to the 

 peduncle of the superior pair ; their flagellum with fourteen articuli. 

 Propodos of posterior gnathopoda having the palm defined by two 

 teeth an external and an interal, with a groove between them in 

 which the extremity of the dactylos lies. 



The head with the coalescent first segment, the second, third, 



and fourth segments of the thorax are all neai-ly equal in length, 



the last being the longest. The fifth segment is longer than the 



fourth ; the sixth is much shorter. The head is without spines, 



65 



