56 CARCINOLÜGICAL STUDIES. 



9. Heteropanope ser rati frons Kinaliau. 

 (PI. 3, fig. 2). 



Ozius? serratifrons , Kiuahan , The Journal of the Royal Dublin 

 Society, Vol. I, 1856, p. 118, PI. IV, fig. 1. 



Pilumnopeus serratifrons , Haswell , Catalogue of the Australian 

 Stalk- and Sessile-eyed Crustacea, 1882, p. 70, PI. II, fig. 1. 



One young male, bearing a Sacculina, from the Pacific 

 Ocean. 



This species somewhat resembles Heteropanope indica 

 tie Man from the Mergui Archipelago , but differs by the 

 following characters. The upper surface of the cephalothorax 

 of Heterop. serratifrons is a little convex, especially 

 anteriorly, that of Heterop. indica rather depressed. (I may 

 observe that Kinahan describes the cephalothorax as » slightly 

 depressed", Haswell however as »very convex, both in 

 the transverse and the antero-posterior direction"!) The 

 cephalothorax is also a little less enlarged in proportion 

 to the length as that of Heterop. indica. The front is a 

 little broader than in the Mergui species, the distance 

 between the internal orbital angles being somewhat longer 

 than the third part of the greatest width of the cephalo- 

 thorax. Kinahan says in his latin diagnosis , that the postero- 

 lateral margins are nearly twice as long as the antero- 

 lateral (margine poster o-laterali contracta, 

 quam margine ant. lat. fere bis longiore), and 

 afterwards he says that the antero-lateral margin scarcely 

 attains the edge of the genital region. In our specimen , which 

 is evidently a young one, the antero-lateral margins are 

 somewhat shorter than the postero-lateral , their length 

 being about in proportion as 5:7. The antero-lateral mar- 

 gins are armed with four teeth, the first of which 

 forms the little prominent external orbital angle. This 

 first lobe is nearly straight or very slightly emarginate 

 and has nearly the same form as in Heterop. indica] the 

 second lobe is considerably longer than the 



Notes from the Loyden JMuseum , Vol. XII. 



