530 Dr. A. Alcock — A Revision 



The andricum is slender and ends in a pair of long, 

 straight, stiff filaments, which stand out at right angles to 

 the rest of the organ. 



The thelycum resembles that of Parapeneopsis sculptilis, 

 Heller, its most conspicuous part being a large Icaf-sliaped 

 median plate lying between the fourth pair of thoracic legs. 



Numerous specimens have been taken off the Ganjara and 

 Orissa coasts up to 68 fathoms and at Madras. 



7. Parapeneopsis acclivirostris, sp. n. 



This small species is quite peculiar among Penei in having 

 no epipodites on any of the thoracic legs and no isolated 

 epigastric tooth. 



Compared wdtli Parapeneopsis stylifera (Edw\) it also 

 shows the following points of difference : — 



The rostrum in the female, though recurved at tip, is 

 nearly straight and uptilted ; it may reach or may fall short 

 of the end of the antennular peduncle ; it has seven teeth and 

 is not produced as a carina behind the gastric region. 



The antero-inferior angle of the carapace is sharp-cut but 

 not spiniform, and the subhepatic ridge, defining the ante- 

 iror part of the cervical groove, stops far short of it and is 

 elegantly ciliated. 



'fhe longitudinal suture of the carapace reaches some way 

 behind the gastric region. 



Tlie sixth abdominal somite is as long as the telson, which 

 is short and has no marginal spinelets. 



The antennular flagella are equal and are not much more 

 than half the length of their peduncle. 



The external maxillipeds and fifth pair of legs reach nearly 

 to the middle of the anteunal scale. 



The thelycum consists of a concave semicircular plate 

 lying between the fourth pair of legs and a squarish plate 

 occupying the space between the fifth pair of legs. 



This species is found in the Persian Gulf, in Palk Strait, 

 at Madras, and off the Yizagapatam and Ganjam coasts. 



All the thirty-four specimens taken are females, and the 

 largest is only 2i inches long. 



8. Parapeneopsis Hunr/erfordi, sp. n. 



This species resembles P. acclivirostris in having only one 

 epipodite on each side, namely, the one borne by the second 

 maxillipeds. 



