458 Transactions. 



setse arranged partially in longitudinal rows on its dorsal surface, 

 the scabrous surface thus formed reaching nearly to the cervical 

 groove ; a single small lateral tooth behind the eyes. 



Abdomen with the 6th segment a little longer than the 

 others, which are subequal ; 1st segment narrow, its lateral 

 margins nearly free from setse ; 2nd with a few setae on lateral 

 margin ; 3rd, 4th, and 5th with dense woolly setae along lateral 

 margins, similar setae extending across the dorsal surface at 

 posterior margins of 3rd and 4th segments, and to a less extent 

 at that of the 2nd. Dorsal surface of abdomen without 

 carinae or other ridges. 



Chelipeds subequal ; merus about as long as propod, its lower 

 inner margin with well-marked fringe of long hairs but without 

 teeth ; a small tooth on upper margin near distal end ; carpus 

 about half as long as propod, a well-marked tooth on upper inner 

 margin and a smaller one (or sometimes two) on inner surface, 

 the one on lower margin nearly or quite obsolete ; propod slender, 

 narrowing slightly towards distal end, surface marked mth 

 slight longitudinal ridges and furrows, upper margin roughened, 

 lower margin not denticulate, numerous hairs on the lower outer 

 surface, some along upper margin, and a well-marked row on 

 inner surface near upper margin. Fixed finger short, stout, 

 curved, reaching only slightly beyond the end of propod. Dactyl 

 much longer than fixed finger, about half as long as propod, very 

 hairy. 2nd pereiopod large, broad, somewhat compressed, and 

 very hairy towards distal end. 



Telson rectangular, distinctly broader than long, its posterior 

 border straight with angles slightly rounded, fringed with long 

 hairs ; outer branch of uropods a little longer than telson ; the 

 inner branch slightly shorter than telson ; inner branch with a 

 median ridge, outer with two ridges near middle. 



Length, about 70 mm. (cephalothorax, 22 mm. ; abdomen, 

 48 mm.). 



Hob. — Auckland and Manukau Harbours (//. Suter) ; Kene- 

 puru {J. Macmahon). 



Remarks. — Miers (Zoological Collections of H.M.S. " Alert," 

 p. 281) says, " Gebia carinicauda is nearly allied to, and may 

 prove to be identical with, G. Mrtifrons, White, which Mr. Has- 

 well mentions as commonly occurring in sponges at Port Jack- 

 son " ; but he proceeds to point out that " in the latter species 

 the spine of the lower margin of the hand (which exists in adult 

 examples of G. carinicauda) is absent." I have not access to 

 Stimpson's description of G. carinicauda, but if we are to 

 consider his specific name carinicauda as descriptive, the two 

 species differ in this respect also, for there is no carina either 



