14 Mr. E. J. Miers on new or little-knoion 



surface of the carapace. The eye-peduncles are very long, 

 compressed, smaller at the distal end, with a small blunt tooth 

 on their anterior margin. The basal antennal joint is but 

 moderately enlarged, with a very small spine at its antero- 

 external angle ; and the two following are somewhat dilated 

 and compressed. Anterior legs (in the female) very small ; 

 arm and wrist granulose, palm and fingers smooth. Ambu- 

 latory legs robust ; merus joints slightly granulated. Post- 

 abdominal segments (of the female) distinct. Length 6i 

 lines. 



Hob. South Australia, Port Lincoln (Mus. Zool. Soc). 



This species is remarkable for the length and mobility of 

 the eyes, the smallness of the basal antennal joint, the non- 

 definition of the lower orbital wall, and the smallness of the 

 rostrum. One female example is in the collection. 



Periceridae. 



Tylocarcinus, Miers. 



The genus Tylocarcinus is nearly allied to Microphrys, 

 M. -Edwards {Milnia^ Stimpson), and to Tiarinia, Dana, but 

 differs from them both in the very slender basal antennal 

 joint, the distal spine of which is short, as in Tiarinia, and is 

 not visible in a dorsal view ; from the former genus it is further 

 distinguished by the narrow and elongated carapace, and from 

 the latter by the divergent rostral spines. 



Tylocarcinus styx. 



Cancer styx, Herbst, Naturg. Krabben, &c. iii. p. 53, pi. lviii. fig. G 



(1803). 

 Pisa styx, Latreille, Encycl. Meth. x. p. 141 (1825) ; M.-Edw. Hist. 



Nat. Crust, i. p. 308 (1834). 

 Microphrys styx, A. M.-Edwards, Nouv. Arch. Mus. Hist. Nat. viii. 



p. 247, pi. xi. fig. 4 (1872). 



Carapace subpyriform and covered with rounded tubercles ; 

 of these, two are placed in the interorbital space, four in a 

 transverse series on the front of the gastric region, followed 

 by three in a triangle. There are three, similarly disposed, 

 on the cardiac, two on the intestinal region, three on the poste- 

 rior margin, three or four on the front and two on the hinder- 

 lobe of each branchial region, and about six on the lateral 

 margins. The spines of the rostrum are acute, rather short, 

 and divergent from a point at some distance above their base. 

 Prasocular spine prominent, acute. Anterior legs (in the 

 male) slender and nearly smooth. Ambulatory legs robust, 

 with the merus joints spinulose, the following joint (in the first 



