4[2 MR. G. S. BRADY'S MONOGRAPH OF 



similar to the female. Shell marked with fine elevated stria?, but without any punc- 

 tat.ion. Central areola similar to that of C. nic/rescens, sometimes jet-black, often 

 obsolete. 



Length -5^ in. 



Hub. The Minch, 50-60 fathoms ( Mr. J. G. Jeffreys) ; Isle of Skye (Rev. Mr. Barlee) . 



5. Cvtherura cuneata, n. sp. (Plate XXXII. figs. 35-38, 63.) 



Atlantic type. Distribution : Recent — Great Britain, Ireland, Levant. Fossil — Glacial, Scotland. 



Carapace of the female, as seen from the side, sub quadrangular, excessively tumid be- 

 hind, nearly equal in height throughout, height equal to half the length, anterior margin 

 broadly rounded ; posterior obliquely truncate, and produced above the middle into a 

 short obtusely rounded beak ; superior margin nearly straight, inferior slightly sinuated. 

 Outline, as seen from above, cuneate, obtusely rounded in front, very broad and centrally 

 mucronate behind; greatest width equal to half the length. End view pentagonal, 

 widest above the middle. Male narrower and more elongated. Shell longitudinally 

 striated on its ventral and anterior portions, reticulated over the posterior protuberances, 

 which are bounded below by a more or less distinct crest or rib. Central areola obsolete. 



Length -,.,'-- in. 



Hah 



South "Wales 

 M . Norman) ; 



Lerwick, Shetland (Mr. D. Robertson) ; Loch Erribol (Mi 



6. Cytherura Sarsii, n. sp. (Plate XXXII. figs. 39-42.) 



Carapace, as seen from the side, elongate, subrhomboidal, nearly equal in height 

 throughout ; height equal to less than half the length. Anterior border rounded ; poste- 



rior obliquely truncate, rounded off above; superior margin nearly straight, inferior 



rather deeply sinuated. Outline, as seen from above, compressed ovate ; width equal to 



about one-third of the length, extremities mucronate. Shell pellucid, smooth, bearing 



a few small scattered hairs, the anterior portion marked with radiating hair-like lines. 

 Areola obsolete. 



Length 5^ in. 



Hab. Amongst oyster-ooze from Stranraer. 



Of this very distinct species I have seen only one specimen. 



7. Cytherura similis, G. 0. Sars. (Plate XXXII. figs. 56-59.) 



Cytherura similis, G. O. Sars, loc. cit. p. 72. 

 Distributiox : Recent — Norway, Great Britain. Fossil 



Norway 



Carapace of the female, as seen from the side, subquadrangular, nearly equal in height 

 throughout, height equal to more than half the length ; anterior margin rounded, pos- 

 terior produced above the middle into a very short obtuse protuberance ; superior margin 

 arched, nearly straight in the middle, inferior slightly sinuated. Outline, as seen from 

 above, oval, sides nearly parallel, breadth equal to half the length, broadly rounded in 



