1887,'] G. M. Giles — Six new Amphipods from the Bay of Bengal. 217 



The first ihvee ahdonmial appendages are of the usual amphipod 

 type, the first and third being subequal, the middle one slightly the 

 longest. The last three abdominal appendages are alike in plan, and the 

 fourth is the longest. They consist of a long cylindrical basal joint 

 provided with a pair of lanceolate rami with serrate margins. The 

 penultimate pair are the shortest of the three and the last but little 

 inferior to the fourth in size. The basal joint of the fourth has the 

 appearance of being composed of two joints ; such an arrangement is, 

 however, from a morphological point of view, so improbable, that, 

 although it is represented in the drawing, I have hesitated to describe it 

 as such. Both sides, however, appeared alike. 



The telson appears obsolete. 



The unique specimen is certainly a female, but the unlucky accident 

 to the dissection prevented my dissecting out the generative organs. 



Its actual length was 5*75 mm. 



(ii.) Phronimella hippocephala, n. sp., PI. Ill, Fig. 3. 



The second species differs from the first in many important points. 

 Speaking generally, it is, both as to body and limbs, if I may use the 

 expression, a much more lanky species. 



The head somewhat resembles that of a horse in shape, but the 

 resemblance is not nearly so striking as that of the first species to the 

 head of a bull. It is not so broad at the top, and no fold surrounds it ; 

 so that the appearance of a cephalic shield is not produced : its dorsal 

 aspect is covered with a large, widely separated pair of apical eyes. 

 The lateral eyes are situated low down laterally, of medium size, 

 and of the same structure as in the first species. 



Both antennules and antennce are present ; the former, much the 

 larger, consist of a three-jointed peduncle and a flagellum of eight 

 or ten short segments, total length equal to a third of the body exclusive 

 of the head. The first two joints of the peduncle are short, while the 

 third, of dilated spindle-shaped form, makes up more than half the 

 length of the organ. Near the distal extremity it is provided with a few 

 short, flattened hairs. The flagellum is quite naked with the excep- 

 tion of one or two small hairs on the last joint. 



The antennce are little more than half the length of the antennules 

 and consist of a peduncle formed of three short joints and a naked 

 tapering flagellum as long as that of the antennule, the proximal arti- 

 culations of which are ill-marked. 



Being unwilling to destroy my only specimen, the gnathites and 

 maxilUpedes were not closely examined: they appeared to resemble very 

 closely those of the first species. 

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