50 



Records of ilie Indian Museum. 



[Vol. XIII, 



to the anterior portion of the fourth sternite. The anterior margin 

 of the third sternite is deeply sunk and transverse or slightly con- 

 cave. Behind the inner angles of the coxae of the third legs there 

 is. on either side, a conspicuous tubercle (text- fig. 3«). 



Between the bases of the first pleopods, both in males and 

 females, there is a large procurved tooth, 



The outer lobe of each half of the petasma (that is to say the 

 portion nearest the pleopod) is more or less crescentic in shape 

 with the antero-external border strongly thickened ; the shape of 

 this portion is similar in all four species. The internal lobe is 

 characteristic in form. At its proximal end it is truncate, much 

 expanded externally aiid with a small process at its inner angle. 

 Its distal portion is without any large processes, such as are found 

 in certain allied species, and appears to consist of a central style 

 surrounded by a thick coating, rather uneven in outline; its sur- 

 face has a sort of honey-combed appearance, due to the presence 

 of numerous small pits, each of which contains a modified booklet 

 (text-fig. 4a). 



The telson reaches well beyond the middle of the inner uropod 

 and is rather sharply pointed at the apex (text-fig. 5c). The angu- 

 lar termination of the lobe at the proximal' end of the infero- 

 lateral margin is placed decidedly nearer the base than the apex.* 



The ciliated and non-ciliated portions of the external border 

 of the outer uropods are separated by a prominent tooth. In 

 adults the proximal non-ciliated part is from r*i to i'3 times the 

 length of the ciliated part (text-fig. ja) ; in young individuals the 

 proportionate length of the former is rather greater. 



Acetes indiciis is the largest of the four species; full grown 

 females, measured from the tip of the rostrum to the tip of the 

 telson, reach a length of about 40 mm. 



The specimens examined are from the following localities: — 



"^°^ Panvel Creek, Bombay 



^-^ Market at Ennur, near Madras 



^^'^^-''^ Coconada, Madras Pres. 



^~^ Pratapnagore, Lower Bengal 



^^ Near Mud Point, R. Hugli, 



10 o ' 



delta 

 Matla R., Gangetic delta 

 Bassein R. estuary, Burma 

 Haingyi I,, off Ba?sein R. 

 S. of Purian Pt., Burma 

 Mouth of Rangoon R., Burma 

 Green I., Amherst, Tennasserim 

 Mergui Archipelago, ii°28'N 

 Mergui Archipelago, i2°o' N., g8°2o' 

 Tale Sap, Gulf of Siam 



97 5 



10 

 97 07 



9^7 1^ 

 10 



^ As in A. evythraeits. text-fig. ^a. 



