ON THE SHETLAND CRUSTACEA, TUNICATA, ETC. 291 



especially at the hinder extremity. Hinge-tooth of the left valve absent. 

 Eyes very small, round. Colour pale brownish yellow, the limbs pale yel- 

 low. Antennae rather long, third and fourth joints of the upper pair 

 coalesced, the last joint short ; lower pair with the third joint narrower 

 than usual, and the terminal nails long. Branchial appendage of the 

 palp of the mandibles very small, only bearing two setse, one rudimen- 

 tary and hamate. Legs slender, second joint of last pair subequal in 

 length to the two succeeding, terminal nail very slender. Copulative 

 organs of male small, the terminal part obtusely triangular." Unst Haaf, 

 20-25 miles N.N.W. of Burranrth, 100-140 fathoms. Now first added 

 to our fauna. 



Cy there crenulata (G. 0. Sars). Oyfhereis crenulata, G. 0. Sars, Overs, af 

 Norges mar. Ostrac. p. 39. 



"Not unlike O. emarginata, but the shell much more ventricose, 

 height and breadth subequal ; side view very short, the height much 

 exceeding half the length, obliquely rounded in front, behind subtrun- 

 cate and slightly emarginate, the lower lobe the more prominant : dor- 

 sal margin a little concave behind the eyes, then convex; ventral 

 margin nearly straight, or indistinctly waved in front of the middle. 

 Dorsal view very tumid in the middle, the two extremities slightly 

 prominent and subtruncate. Valves indistinctly areolated, but closely 

 and finely punctate, the front margin and lower part of the hinder 

 margin forming two lips, the innermost of which is crenulated with 

 fine teeth, and fringed with rather long hair ; surface uneven, a rounded 

 protuberance before the middle, and two elongated protuberances to- 

 wards the hinder extremity, one of which is near the dorsal, the other 

 near the ventral margin. Eyes very large." Eare, 20-25 miles N.N.W. 

 of Burrafirth, 100-140 fathoms. New to Britain. 



emarginata (G. 0. Sars). One young specimen (?) in St. Magnus Bay, 



about 60 fathoms. 



leioderma, n. sp. Carapace very tumid, subquadrate, length to height 

 as about two to one ; greatest height anterior : dorsal margin nearly 

 straight ; ventral also nearly straight, slightly sinuated in the middle : 

 anterior extremity subtruncately and subobliquely rounded, infero- 

 anteal corner well rounded, commencement of anterior dorsal slope a 

 little angled ; posterior extremity truncate, not at all oblique, slightly 

 emarginate in the middle. Yalves smooth, not sculptured, having only 

 a very few distant punctured papillaB. Dorsal view long-elliptic, very 

 tumid ; breadth equal to one-half of length, of nearly equal width 

 throughout, and remarkably regularly rounded at the broad extremities. 

 Length ^-V inch. 



This species has much more the aspect of a Cytlieridea than of a 

 Cytliere, but the hinge-margin is not toothed. In the genus Cyfhere it 

 should perhaps come next to G. albomaculata. 

 From very deep water, Unst Haaf, 1867. 



Cytlieridea papillosa, Bosquet. Eare, Unst Haaf, 1867. 



punctillata, Brady. Unst Haaf, 100 fathoms. 



subflavescens, Brady. One specimen, 5-8 miles off Balta, 50 fathoms, 



1867, exactly agreeing with the type ; another in St. Magnus Bay. 



Sorbyana, Jones. 80-100 fathoms, 20-25 miles N.N.W. from Burra- 

 firth Lighthouse, 1867. 



Zetlandica, Brady. The type specimens were found by me among a 



gathering of shells &c. procured by washing weeds in Shetland, by Mr. 



