188 



POST-TERTIARY ENTOMOSTRACA. 



4. LoxocoNCHA TAMARiNBUS {Jones). Plate VIII, figs. 8 — 11. 



1856. Cytheridkis tamarindus, Jones. Monog. Entom. Tert. Form. England, 



p. 49, pi. iii, figs. 4 a, 4 6. 



1865. Ctthere l^vata, Norman. Nat. Hist. Trans. Northumberland and Durham, 



vol. i, p. 18, pi. V, figs. 13—16. 



1865. LoxocoNCHA LONGiPES, G. O. Sufs. Overs. Norg. mar. Ostrac, p. 63. 



1868. — TAMARINDUS, Monog. Eec. Brit. Ostrac, p. 435, pi. XXV, 



figs. 45—48. 



Carapace of the female, as seen from the side, elongate, subrhomboidal, height nearly 

 equal throughout, and equal to about half the length. Extremities obliquely rounded ; 

 superior margin nearly straight, obtusely angular behind ; inferior slightly sinuated in 

 front, then convex. Outhne, as seen from above, elongate-ovate, its greatest v^^idth in the 

 middle, and equal to less than half the length. End-view broadly ovate, keeled. Shell 

 of the male narrower and more elongated (fig, 11). Surface of the valves smooth, 

 minutely and closely punctate and bearing a few very small scattered papillae. 

 Length, g^^th of an inch. 



This species is found abundantly in the living state in the British Seas and on 

 the coast of Norway, ranging from 2 to 40 fathoms. 



Distribution. Recent. — Norway, Great Britain, Ireland, Bay of Biscay. 



Fossil. — Scotland : in nearly all the Post-tertiary beds on the west, and on the east at 

 Ehe and Drip Bridge. Ireland : New Docks at Belfast, Portrush. England : Crag, 

 Suffolk. Norway; Post-tertiary. 



5. LoxocoNCHA ELLiPTicA, Brady. Plate XIV, figs. 23 — 25. 



LoxocoNCHA ELLIPTICA, Brady. Monog. Rec. Brit. Ostrac, p. 435, pi. xxvii, 



figs. 38, 39, 45—48 ; pi. xl, fig. 3. 



Carapace of the male, oblong, compressed ; seen from the side, subrhomboidal, nearly 

 equal in height throughout ; height equal to somewhat more than half the length ; anterior 

 extremity obliquely, posterior well and evenly rounded ; superior margin straight, inferior 

 shghtly sinuated in the middle ; seen from above, compressed, ovate, pointed in front, 

 narrowly rounded or submucronate behind, width equalling nearly half the length. The 

 shell of i\\Q female is shorter, more tumid, and has the dorsal margin distinctly arched. 

 Surface of the valves smooth, bearing several small scattered circular papillae. 

 Length (of the male), ^th of an inch. 



