304 CRUSTACEA. 



species pertains properly with the Corystoidea, and not with the 

 Maioidea, where it is placed by White. 



Telmessus terrains, WHITE, Ann. aud Mag. Nat. Hist., 1846, xvii. 497, and Crust., 

 Voy. of the Samarang, p. 14, PI. 3. 



FAMILY III. CORYSTIDJ3. 



PELTARION SPINULOSUM (White), Hambron and Jacquinot. 

 Plate 18, fig. 6 a, animal, natural size; b, abdomen of male. 

 From Southern Patagonia. 



Length of carapax of a male to tip of beak, two inches ; breadth, 

 also two inches. Finely reticulated with a reddish-orange colour, legs 

 yellow, or orange. The regions in this species may be distinguished, 

 although not very apparent. The medial is a little raised, and the 

 intra-medial (3 M), is distinct from the extra-medial (2 M) ; this intra- 

 medial is prolonged somewhat backward and has a linear scar either 

 side of it, and from near the posterior part of this scar a depression 

 commences which passes obliquely towards the margin, reaching it 

 between two of the prominent points of the lateral margin, the me- 

 dian one of the lateral margin and the next posterior. This depres- 

 sion is the limit between the antero-lateral and postero-lateral regions, 

 and the posterior of the points on the margin is therefore S ; anterior 

 to it there are four prominences, corresponding to T, N, E, D, making 

 the normal number five, each of which lobes is set with spinules. 



Atelecydus spinulosus, A. WHITE, Ann. Mag. N. H., xii. 345. 

 Peltarion mageUanieus, H. and JACQ., Voy. au Pole Sud, p'l. 8, f. 1. 



PSEUDOCORYSTES SICARIUS (Pxppiy), White. 



Valparaiso, Chili. 



