OF NOKTHITMSERLAND AND DURHAM. G9 



fathoms at Whitburn, and has also got it in sixty fathoms by 

 deep-water dredging off the Durham coast. 



5, N. Gr(enlandica, Beck. 



Natica Groenlandica, " Beck," Moller Index Moll. Groenl. 7. 

 JVatica 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. HELicoiDES, Johns. 



Natica helicoides, Johns, in Berw. Club Proc. i. 69. 

 Very rare. Two specimens have been met with by Mr. R. 

 Howse from the fishing boats at Sunderland. 



Family. Velutinid^, Gray. 

 Q5. VELUTINA, Fleming. 



1. V. laevigata, Penn. 



Helix Icevigata, Mont. Test. Brit. 382. 

 On large shells and stones from the coralline zone, frequent. 



2. V. plicatilis, Mull. 



Bidla fl.exilis, 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. C. Abbes and Mr. R. Howse have 

 since got several specimens, at Whitburn. 



3. V. 1 OTIS, Tiirt. 



Helix Otis, Turt. Conch. Diet. 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 which it can scarcely be withdrawn : the tentacles are very 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 



