40 Mr. J. G. Jeffreys on British Mollusca. 



now present to your readers a notice of a few new species and 

 some additional localities which have occurred to mc during this 

 year. Probably no department of the British fauna has been 

 more assiduously and successfully explored than that of our 

 native testaceous Mollusca; and, as some proof of this, I may 

 observe, that since the publication of Messrs. Forbes and Han- 

 ley's work (now nearly five years ago), scarcely any addition has 

 been made to the list of established species, notwithstanding the 

 increase in the number of collectors, and the assistance given by 

 the British Association to dredging operations on various parts 

 of our coasts. The recent discovery of Mangelia Holbdllii in 

 the north of Ireland is almost a solitary exception. 



For all the present additions to the British Testacea I am 

 more or less indebted to my kind friend Mr. Barlee, who has 

 again, with his usual liberality, placed at my disposal the results 

 of his indefatigable and valuable labours. One of the new 

 species (viz. Diodonta Barleei) was dredged by him off the west 

 of Ireland. Two others [Poromya subtrigona and Eulimella 

 oheliscus) I procured from shell-sand dredged by him off the 

 Zetland coast. Another species [Odostomia minima) was origin- 

 ally discovered by him in the last-named locality ; although it 

 has been noticed (but not described or figured) by Forbes and 

 Hanley in the Appendix to their work. Three others {Area 

 nodulosa of Miiller, Rissoa glabrata of Philippi, and Amphi- 

 sphyra globosa of Loven) I now propose to add to the list ; the 

 first two having been found by me in Shetland and Skye shell- 

 sand dredged by Mr. Barlee, and the last taken by him at Skye. 



For some of the additional localities I have also to thank 

 Edward Waller, Esq., of Lissenderry, near Aughnaclo}^, and 

 Mr. Samuel Wright, jun., of Cork. 



Reference will be given, in every instance, to the volume and 

 page of the ^ British Mollusca,' for the convenience of those who 

 are especially interested in the subject, and may wish to judge, 

 for themselves as to the hitherto ascertained limits of distribution 

 of any of the species here noticed. 



I have again on this occasion adopted the Plinian use of the 

 word ' uncia' to signify ' one-twelfth ;' the integer being a foot, 

 English measure. 



I am in hopes of being followed and supported by other 

 British conchologists in this endeavour to improve our know- 

 ledge of the native Testacea, so as gradually to form materials 

 for a new edition of Forbes and Hanley's work. Every new 

 locality (well authenticated, of course, in respect of accuracy and 

 discrimination of species) will be most useful for this purpose. 

 Some have been already recorded in previous pages of the 

 ^ Annals.^ V.4 



