30 Mr. Jeffreys on British Mollusca. 



testaceous, wider behind than in front; antennse fuscous, the 

 basal joints testaceous; palpi testaceous; mandibles nearly 

 straight, and projecting very slightly, giving a triangular outline 

 to the front of the head. Thorax with anterior angles acute 

 and posterior obtuse*; sides with a narrow raised edge and 

 slightly sinuate behind, coarsely punctate over the whole sur- 

 face, dorsal line faintly observable on the disk, and a consider- 

 able elongate fovea near each of the posterior angles. Scutellum 

 small, transverse and impunctate. Elytra punctate-striate, most 

 closely and deeply at the apex, the punctures in the striae small 

 and closely placed together, the interstices flat and thickly co- 

 vered with a fine granulose punctuation; apex deeply excised, so 

 much so as to remind one of the apex of the elytra in the male 

 Silpha sinuata. Under side pretty coarsely punctate, except on 

 the segments of the abdomen, which are only finely punctate. 

 Legs testaceous. 



V. — Further Gleanings in British Conchology. 

 By J. GwYN Jeffreys, Esq., F.R.S. 



[Continued from vol. ii. p. 133.] 



[With a Plate.] 



I LAST autumn paid a short visit to my friend Dr. Lukis at 

 Guernsey, and through his kindness became better acquainted 

 with the Mollusca of the Channel Isles ; and having received a 

 consignment of Zetland shells from Mr. Barlee, and several valu- 

 able communications from the Rev. Mr. Norman, Mr. Hyndman, 

 Mr. Lukis, Mr. Wm. Thompson, the Rev. Leonard Jenyns, 

 Mrs. CoUings, Mr. Wm. Clark, Mr. Alder, Mr. M^Andrew, 

 Capt. Bedford, Mr. Bean, Mr. Pickering, Dr. Halley, Mr. Web- 

 ster, and last, but not least, my zealous and able collaborateurs, 

 Dr. Lukis and Mr. Barlee, I am enabled to make another contri- 

 bution to British Conchology. Some of the facts which I have 

 thus collected, and now present to my readers, will I think be 

 found to possess not a little interest in a geological as well as a 

 conchological point of view, and to show the intimate connexion 

 which exists between the two sciences, while others have an 

 important bearing on the difficult and unsettled question of 

 geographical distribution. 



I have also had opportunities of examining typical collections 



* In his synopsis of the characters of this genus, Prof. Lacordaire 

 (Genera, i. p. 301) has added a generic character to those given originally 

 by the Count Dejean, which I do not think warranted, and which should be 

 withdrawn, viz. that the posterior angles of the thorax are rounded. They 

 are usually obtuse, and sometimes rounded, but not always so. 



