ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 283 



not quite so long as carpus, ovate ; palm continuous with the hand, with 

 a row of about eight strong spines; finger gently curved, shutting 

 closely against the hand, which it nearly equals in length. Second 

 gnathopods in general character very like the first, but the propodos 

 somewhat broader and longer (as long as carpus), with two or three 

 longitudinal rows of hairs in place of the spines of the first pair, and 

 the finger only about half its length. Basos of the anterior pairs of 

 pereiopods of somewhat twisted form, the front margin armed with 

 several (5-6) strong spines. All the uropods subequal in length, bear- 

 ing the same general characters as in the genus Microdeuteropus. 

 Telson tubular. Length a third of an inch. A single specimen pro- 

 cured in 1863. 



Protomedeia pectinata, n. sp. Superior antennae with second joint of peduncle 

 subequal in length to but much more slender than first, last joint two- 

 thirds length of second ; filament slightly longer than peduncle, con- 

 sisting of about ten long articulations ; secondary appendage two-jointed, 

 scarcely longer than first articulation of filament. Inferior antenna3 

 subpediform, short; filament not longer than last joint of peduncle. 

 First gnathopods having basos fringed anteriorly with a few scattered 

 long seta3; ischium having a postero-distal dense tuft of long seta3; 

 meros, carpus, and propodos all posteriorly thickly clothed with rather 

 long setae, the last two subequal in length, the propodos oblong, sub- 

 parallel sided, twice as long as broad, distally truncate ; finger strong, 

 much longer than the truncated extremity of propodos, not internally 

 serrate (as in $ of Microdeuteropus versiculatus, which this species re- 

 sembles in general structure of first gnathopods), but furnished with a 

 single large spine on the inner edge near the apex. Second gnathopods 

 having basos long (equal in length to four succeeding joints), posteriorly 

 straight, anteriorly convex, and furnished with two rows (one on edge 

 and the other a little within it) of very long slender seta3, arranged in a 

 comb-like manner ; ischium and meros narrower than carpus ; carpus 

 narrow, only slightly widening distally ; propodos subequal in length to 

 carpus, lanceolate, tapering from base to distal extremity, both margins 

 fringed with long setse, those of the anterior side the longer ; finger 

 long, narrow, of equal thickness throughout, more than half as long as 

 propodos, not unguiculate, nor capable of being bent back upon the pro- 

 podos; the blunt distal extremity terminated by two or three seta9. 

 First pereiopods not having the meros anteriorly produced ; finger very 

 long and slender, subequal to propodos, and much longer than carpus. 

 Last pereiopods with hinder margin of basos not serrated, furnished with 

 a row of distant seta3, which take their origin from some little distance 

 within the margin. Telson and uropods closely resembling in structure 

 those of the species of Microdeuteropus. 



A single specimen (a female ?) dredged in St. Magnus Bay, 1867. 

 - (?) Whitei, Bate. Five to eight miles off the island of Balta, 40-50 

 fathoms, and in Balta Sound, about 7 fathoms. 



This species is certainly no Protomedeia ; the squamate, double telson 

 separates it from that genus. I believe it to be the female of Lillje- 

 borgia Shetlandica ; at any rate the male of the present species most 

 closely resembles the drawing and description of that species in all 

 respects except that the basos of the last pereiopods is not so distinctly 

 serrated as figured. Unfortunately my type specimens of Lillyeboryia 

 Shetlandica have been mislaid ; and for the present it will be better to 



