42 



This is a small species, the largest female being only 2J inches long : 

 males of still smaller size appear, from the structure of the anclricum, to be 

 adult. 



The collection contains 16 specimens, registered under the following num- 

 bers : — 



2359 7205-12 ^ n • f 



— — : Types of female. Gfinjam coast. 



7213-14 



9 

 4078 



Types of male. Ganjam coast. |^ " Investigator." 



Orissa coast, 68 f atlioms. . 

 " J 



4445-47 



9 



Madras. Purchased. 



6. Parapeneopsis acclivieosteis, Alcock. Plate VIII., fig. 27, 27a. 



Parapeneopsis acclivirostris, Alcock, Ann. Mag. Nat. Hist. (7) xvi. 1905, p 530. 



an PeK^MS ieneJZus, Spenoe Bate, Cliallenger Macrura, p. 270,1888: Kishinouye, Joarn. Fish. Bnr. Tokyo, 

 VIII. I. 1900, p. 22, pi. vi. fig. 3, pi. vii. fig. 8, 8<i, 6. 



This small species is quite peculiar among Indian Penei in not having 

 epipodites on any of the thoracic legs, nor any isolated epigastric tooth behind 

 the rostrum. In the latter respect it resembles Penasus tenellus of Spence Bate 

 and Kishinouye and Penaeus crucifer of Ortmann. 



Compared with P. stijUfera it exhibits the following points of difference : — 



The rostrum, iu the female, though recurved at tip, is nearly straight 

 and uptUted : it may reach or may fall short of the end of the antennular ped- 

 uncle : it has 7 teeth and is not produced as a carina behind the gastric region. 



The an tero -inferior angle of the carapace is sharp-cut but not spiniform, 

 and the subhepatic ridge, defining the anterior part of the cervical groove, 

 stops far short of it and is elegantly ciliated. 



The longitudinal suture of the carapace reaches some way behind the 

 gastric region. 



The 6th 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 5th pair of legs reach nearly to the middle 

 of the antennal scale. 



The thelycum consists of a concave semicircular plate lying between the 

 4<th pair of legs, and a squarish plate occupying the space between the 5th pair 

 of legs. All our specimens, Si in number, are females. 



