OF NORTHUMBERLAND AND DURHAM. 163 
fathoms at Whitburn, and has also got it in sixty fathoms by 
deep-water dredging off the Durham coast. 
5. N. Granuanpica, Beck. 
Natica Groenlandica, “ Beck,” Méler Index Moll. Greenl. 7. 
Natica livida, Bean in Thorpe’s Brit. Mar. Conch. 265, f. 55. 
In deep water, rare. Obtained by Mr. W. King from the fish- 
ing boats, and afterwards dredged alive by him in fifty fathoms. 
Mr. R. Howse has also got a few specimens from the boats and 
by deep-water dredging. 
6. N. HELIcormpEs, Johns. 
Natica helicoides, Johns. in Berw. Club Proce. 1. 69. 
Very rare. Two specimens have been met with by Mr. R. 
Howse from the fishing boats at Sunderland. 
Faminy. VELUTINIDA, Gray. 
65. VELUTINA, Fleming. 
1. V. Lavieata, Penn. 
Helix levigata, Mont. Test. Brit. 382. 
On large shells and stones from the coralline zone, frequent. 
2. V. puicatiuis, Jul. 
Bulla fiexilis,, Mont. Test. Brit. Supp. 168. Laskey in 
Wern. Mem. i. 396, t. 8, f. 6. 
In shallow water, rare. We have got two individuals from 
the stomachs of flat-fish, and one was obtained some years ago 
by Mr. Wm. Backhouse among the rocks at the “Bear’s Back,” 
Cullercoats. The Rev. G. ©. Abbes and Mr. R. Howse have 
since got several specimens, at Whitburn. 
3. V.? ois, Turt. 
Helix otis, Turt. Conch. Dict. 70. 
A number of specimens of this interesting little species were 
got several years ago on the rocks between tide marks on the 
Marsden coast, particularly on the sides of the great rock. 
Since that time we have frequently looked for it in vain. The 
animal is transparent white,aud rather large for the shell, within 
which it can scarcely be withdrawn: the tentacles are very 
short and triangular ; the eyes are immersed in the tentacles 
apparently towards the inner base, but, from the transparency of 
