292 ' • -„ 



Mediterranean also in water of 20 — 30 and off the west coast of the Indian peninsula in 

 water of 28 fathoms. 



Key to the known species of the genus Aegcoti (Risso) Guer.-Menev. '). 



«, Second lateral carina of the carapace interrupted anteriorly by 

 a well-defined hepatic groove; lateral parts of i^' and 2"<J 

 abdominal somites irregularly lobed, without sharp longitu- 

 dinal keels continuous with those on the carapace. 

 l\ Two or three tubercles, forming an oblique transverse row, 

 between the median and first lateral carinae. 

 Supra-marginal carina of carapace serrate, abdominal pleura 



subacute , cataphracfa (Olivi) 



(G. Ouvi, Zoologia adriatica, 1792, p. 50, pi. 3, fig. i. — Th. R. R. Steb- 

 BING, South African Crustacea, Cape Town, 1900, p. 50 (ubi synon.) 



d.. Surface between the carinae of the carapace smooth, without 

 tubercles, 

 ^j Supra-marginal carina of the carapace smooth. 

 d^ Antepenultimate thoracic sternum in the adult male and 

 in the adult female smooth, in the male the two posterior 

 thoracic sterna sharply carinated, in the female also 

 smooth. 

 Second peraeopods not different in the two sexes, reaching 

 in both but a little beyond the carpal articulation of the 



hand of the anterior pair peimata (Bate) 



</; The three last thoracic sterna in the male sharply carinated, 



in the female the carination of the antepenultimate 



sternum is distinct, but that of the last two is obsolescent. 



Second peraeopods in the adult male and in the young as 



long as in the typical A. pettnata (Bate), in the adult 



female almost as long as the anterior pair . . . pennata (Bate), var. affinis Alcock 

 (A. Alcock, A descript. Catal. Indian Deep-Sea Crust., Calcutta 1 90 1 , p. 1 1 8.) 

 ^2 Supra-marginal carina of the carapace serrate. 

 d^ Median carina of the carapace with 8 — 10 teeth or .serrations. 

 e^ Abdominal pleura with truncated tips, 

 /j On either side of the middle line of the 2'"^ abdominal 

 somite there is a broad sinuous ridge, that extends . 

 obliquely throughout the length of the somite. 



Rostrum not cleft at tip propensalata (Bate) 



(C. Spence Bate, Report Challenger Macrura, 18S8, p. 496, PI. XC, 

 figs. 2, 3; PI. LXXXVI, fig. 5.) 



1) Eor drawing up this key use has chielly been made of the Synopsis of the Indian species in Mr. Stanley Khmt's paper, in: 

 Records Indian Museum, Vol. -Ml, I'art VIII, Calcutta 1916, p. 375. 



