154 
MOLLUSCOUS ANIMALS. 
Tellina edentula, t. 41. /. 5. et t. 44. /. 7. Broderip and Sowerby, Zool. Journ. 
iv. p. 363. 
From Behring’s Straits. 
Tellina proxima, t. 44./. 4. Brown, MS. 
Shell oval, depressed, white, anterior side much larger than the posterior, rounded ; posterior side angular 
near the ventral margin ; sinus in the palleal impression larger in the left than in the right valve. 
Inhabits the Arctic Ocean. 
This shell resembles the common Tellina tenuis, in general appearance, but nevertheless differs in shape, 
in being thicker, and in having a thick epidermis, which however only remains near the ventral edge. Its 
exact counterpart is found in a fossil state on the Isle of Bute, also at Helensburg, and near Glasgow. 
Lucina interrupta, var. t. 44./. 3. 
Cytherea interrupta. Lam . Hist. nat. des anim. sans vert. p. 574. 
The shell here represented must be considered merely as a variety of Lucina interrupta, the only circum- 
stance in which it differs being that the radiating grooves cover the whole shell, although they are rather less 
strongly marked in the middle than at the two ends. 
Mulinia Byronensis, t. 44. /. 11. Gray , in Nat. Hist. May. new series, vol. I. 
p. 376. 
Abundant at Valparaiso. 
Mulinia Donaciformis, t. 44./. 13. Gray, in May. of Nat. Hist, new series, 
vol. I. p. 376. 
From Nevis. 
Mactra SIMILIS, t. 44./ 8. Gray, MS. in Brit. Mus. 
From the Northern Seas. 
Mactra australis, t. 44./. 6. 
Shell subtrigonal, slightly ventricose, smooth, thickish, white, anterior side rather the shorter, its dorsal 
line curved outwards j posterior dorsal line straighter ; ventral margin regular, rounded ; epidermis thin, 
pale'; length 1-5, height 1'25, thickness 0-8 inch. 
From the Swan River. 
