442 



MR. G. S. BRADY'S MONOGRAPH OF 



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

 tation. Central areola similar to that of C. nigrescens, sometimes jet-black, often 

 obsolete. 



Length in. , Z^y^ — — 

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



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



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



Carapace oiihe, female, as seen from the side, subquadrangular, 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. Hale narrower and more elongated. Shell longitudinally 

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

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



Length -gi- in. 



Hab. Birtcrbuy Bay, 10 fathoms, in shell-sand from Preston Pans, Donegal Bay, and South Wales 

 {G. S. B.) ; Skye {Rev. Mr. Barlee) ; the Minch, and in rock-pools, Herm {Rev. A. M. Norman) ; 

 Lerwick, Shetland {Mr. B. Robertson) ; Loch Erribol {Mr. D. 0. Drewett). 



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



Carapace, as seen from the side, elongate, subrliomboidal, 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 -5-0 in. . ^. ^ 

 Hab. Amongst oyster-ooze from Stranraer. 



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



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

 Cytherura similis, G. O. Sars, loc. cit. p. 73. 



Distribution : Recent — Norway, Great Britain. Fossil — Glacial, Scotland, 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 



