BY F. E. GRANT. 317 



The species closely resembles the type-species of the genus, C. 

 glaucomma Alcock,* but, besides minor differences, it varies so 

 remarkably in the proportions of the carapace and limbs that I 

 have little hesitation in describing it as new. 



I append measurements of the two species for purposes of 



comparison. 



C. similis, C. glaucomma. 



Length of carapace 7'Omm. ... 6'5mm. 



Breadth of carapace 7*0 ,, ... 6*5 ,, 



Length of chelipede 8*5 ,, ... 9*0 ,, 



Length of second leg 21-0 ,, ... 28-5 ,, 



Length of fourth leg 8*0 ,, ... 4*5 ,, 



[Note. — In the figure submitted the length of the carapace is 

 shown as slightly shorter than it should be.) 



Tribe DROxMIACEA. 



Subtribe HOMOLIDEA. 



Family LATKEILLIDiE. 



Latreillopsis Henderson. 



Latreillopsis Petterdi, n.sp. PI. x. figs. 2, 2a, 26. 



Carapace subquadrilateral, longer than broad, with deep 

 vertical sides, not concealing the basal joints of the ambulatory 

 legs. 



Linea anomurica only faintly discernible. 



Pront ending in a rostral spine which is somewhat concave 

 above and is slightly deflexed. This is flanked on either side by 

 a supraocular spine about twice the length of the rostrum. These 

 supraocular spines point sharply upwards and bear a small 

 tubercle near the distal end of their inner margin and two sharp 

 spines on their outer margin. 



The regions of the carapace are well defined. There is on 

 either side a row of six sharp spiniform tubercles of which the 



* Ann. Mag. Nat. Hist. May, 1894, p.406; Journ. Asiatic Soc. Bengal, 

 Vol.lxv. Pt. ii. p.287, 1896; and III. Zool. "Investigator," Crust, pi. xiv. 

 fig. 9, taken at depths of 205 and 405 fathoms in the Andaman Sea. 



