424 Rev. M. J. Berkeley on Dentalium siibulatum, 



made known. I therefore hope Mr. Bell will find occupation witli them, 

 and perhaps a treat. Some of the above I never had leisure to examine ; 

 but of several of the smaller ones I took memoranda while alive ; and 

 from these I might have been tempted to introduce some extracts, but 

 that I have at last opened my eyes to the length to which this letter has 

 already been protracted ; and I will not therefore trifle longer with your 

 patience farther than to say that there are in the otlier bottles a variety 

 of our domest'rc Spiders, and of Insects, many among which may also be 

 new. 



I have the honour to be, dear Sir, 



Your's very sincerely, 



E. N. Bancroft. 



Art. LVII. Observations upon the Dentalium subu/utiiin 

 of Deshayes. By the Rev. M. J. BERKKLfc.v^ A. iM. 



During the summer of 1830 extensive soundings were made by 

 Captain A. Vidal, R. N. on the N. W. coast of Ireland on the great bank 

 running parallel with the coast, in search of Aitkin's Rock. A few of 

 the specimens of sand, gravel, &c. from different parts of the bank having 

 been kindly placed in my hands, I found amongst them several indi- 

 viduals of a Dentalium new to our coasts. These, on comparison with 

 Madeira specimens from Mr. Lowe, and others in Mr. G. B. Sowerby's 

 collection, proved to be the Denlalium snbulatum of Deshayes, (Anat. & 

 Monogr, du genre Dentale, p. 53) ; the only points of difference being a 

 paler hue, and an almost total absence of the constriction near the orifice. 

 The former difference is exactly such as might be expected from their 

 occurring in a higher latitude, and the latter is clearly so variable, as not 

 to throw any suspicion on the specific identity of the several specimens. 

 They occurred in fine sand, at various distances from the coast, in 

 lat. 55°, at great depths, from 60 to 120 fathoms. As I was not sure 



