202 REPORT— 1866. 



furnished with tufts of hair on the upperside ; filament short, equal in length 

 to last two joints of peduncle, seven -jointed. Eirst gnathopods short ; wrist 

 excessively short, forming a little projecting hair-tijjped lobe on the posterior 

 margin, and much shorter than preceding joint (meros) ; hand oblong, as 

 long as the wrist and meros taken together, with only two fine seta) on the 

 anterior, and a few spine-like setoD on the posterior margin, slightly nar- 

 rowed towards the palm, which is not at all oblique ; nail very large, haraig 

 one or two fine sette on the iipper margin. Second gnatliapods with wrist 

 and meros subequal, and each longer than the hand, meros having posterior 

 and wrist anterior margin covered with fine down -like setse ; pad of wrist 

 finely scaled ; hand much narrower than the wrist, having both margins 

 beset with fine downy seta3 ; terminal brush of hair not dense ; nail well 

 developed, and infero-posteal angle of hand produced so as to form with the 

 nail a little chela. Last pereiopods not having any of the joints below the 

 basis posteriorly produced. Branches of last uropods slightly longer than the 

 peduncle, outer terminating in three spines and having two or three smaU 

 spines on the margin ; inner terminating in a single spine, and having only 

 one very fine seta on each margin. Telson having a wide but shallow cleft, 

 which does not extend more than one-thii-d of its length ; each portion is 

 terminated by a single spine, and there are also two pairs of spines on the 

 upper surface. Posterior angles of abdominal segments rounded and not 

 serrate. Fourth abdominal segment with a dorsal sinus. 

 Dredged in Sleat Sound. 



Euonyx, Norman, nov. gen. 



Differing from Anonyx in having the first gnathopods chelate, and the 

 second stronger than the first, subchelate, nail large and strong. Posterior 

 uropods two-brajiched. Telson cleft. 



Euonyx chelatus, jSTorman, u. sp. 



Superior antennse bent directly downwards ; first joint of peduncle very 

 large, concave above (thus giving the front of the head, the antennrc being 

 bent downwards, an emarginate appearance); second and thi;l joints very 

 short,? and much naiTowcr than the first ; filament ten-jointed ; appendage 

 six-jointed, reaching to the end of the third joint of the filament. Inferior 

 antennaj having the last two joints of the peduncle subequal, not furnished 

 with any sjiines or hairs; filament twenty-jointed, not twice as long as the 

 peduncle. First gnathopods having hand and wrist about equal to each other, 

 long, narrow, parallel- sided, nearly naked, having only very few seta3 ; in- 

 ferior distal angle of hand greatly produced, so as to form in conjunction with 

 the nail a slender horizontal chelate claw ; nail large, strong, furnished with 

 two or three bristles on the upper margin near the point. Second gnathopods 

 more strongly developed than the first, having the wrist furnished with tufts 

 of hair on the posterior margin ; hand shorter than wrist, having several 

 rows of long sette on anterior, and two similar rows on the posterior margin ; 

 palm oblique, well-defined, concave ; nail large, strongly curved, simj^le. 

 Pereiopods very stout and strong, having the basis largely developed and 

 extending do^vnwards to the middle of the meros ; posterior margin of meros 

 also largely developed outwards and downwards into a process which, in the 

 posterior, extends beyond the carpus ; the whole of the anterior side of the 

 legs is beset with numerous strong spines ; the nail is large, very strong, and 

 has a cilium on the inner side near the extremity. Eami of last uropods 

 flattened and nearly twice as long as peduncle, margras plain ; iiuier ramiis 



