BY WILLIAM A. IIASWELL, M.A., B.SC. 51 



cluster of granules; pterygostomial regions very acutely angulated. 

 Median posterior spine little longer than the lateral, conical, 

 pointed, and sharply recurved at the apex ; lateral spines flattened, 

 triangular. Front entire, slightly depressed mesially. Arm 

 covered with large granules throughout its whole extent : wmt, 

 hand and fingers covered with fine granulations ; lingers ahout 

 half the length of the hand, slightly ridged longitudinally. 

 External maxillipedes and sternum covered with minute 

 granulations. Abdomen of male triangular, granulated externally, 

 smooth mesially, its borders concave throughout the greater part 

 of their extent, a prominent tubercle on the penultimate segment. 

 Abdomen of female granulated, broadly ovoid, with well-marked 

 longitudinal sulci, and a tooth on the penultimate segment. 



Carapace marked with variously-disposed blotches of orange ; 

 the proximal half of the upper surface of the arm, and the 

 articulations of the ambulatory limbs marked with the same 

 colour, of which also two circular spots occur on the upper surface 

 of the third joint of each ambulatory limb. 



Length 1 inch; breadth 10 lines. 



This species — of which the young specimens do not differ 

 markedly from the adult — is very near that described and figured by 

 Mr. Miers (I. c, pi. 38, figs. 25 — 27.) as probably the young of If. 

 mamniiUaris, Bell; but offers from it in the form of the posterior 

 median spine, the prominence of the intestinal region, and the 

 shape of the adomen of the niale.* From 31. mammillwris it differs 

 widely in the form of the front and of the posterior spines, and 

 the greater shortness and stoutness of the anterior limbs, as well 

 as in the possession of a carina, and the stronger angulation of 

 the pterygostomial region. 



JIah. Sue, Darnley and Palm Islands ; Cape Grenville (Chevcrt 

 Exped.). 



* The carapace is more regularly tapering behind than it appears in the figure. 



