Mr. Jeffreys on British Mollusca, 117 



So far as I can judge from the description of this genus, it 

 appears to be very nearly allied to Glanconome, which is found in 

 the rivers of Asia, and it is chiefly separated from the known 

 species of that genus by the siphons of the animal being united 

 to the end, while in the animal of the only species of Glauco- 

 nome which has been observed, they are only united at the base ; 

 but the siphons of different species of several genera vary in the 

 extent to which the siphons are united. 



Mr. Benson observes, "the branchial siphon is ciliated in 

 Solecurtus." Perhaps Mr. Benson intends by " cilia " tentacles 

 or beards ; for I am not aware that any of the conchiferous Mol- 

 lusca have the siphons destitute of cilia. But the question is, 

 what does Mr. Benson mean by Solecurtus ? as that name has 

 been given to a number of different animals. Novaculina is 

 evidently most nearly allied to " Tag el" of Adanson (Solen 

 Guinensis, Gmelin), to which I have given the name of Tagelus 

 in my list of genera, so long ago as 1848, when I placed Nova- 

 culina as a subdivision of that genus ; and Mr. Benson's figure, 

 now first published, justifies that position in all particulars, and 

 is very different from the Solecurtus of De Blainville (1824), which 

 has S. strigillatus for its type. 



Since the above was in type, Mr. Benson has kindly sent to 

 the British Museum a specimen of each of these genera. They 

 confirm the opinions above stated. Tanysiphon is evidently very 

 nearly allied to Glauconome, but is distinct in the teeth being 

 more conical and less compressed, the hinder one shorter and 

 less oblique, and especially in the cartilage and ligament being- 

 very short, and placed obliquely close behind the cardinal teeth ; 

 while in Glauconome the cartilage and ligament are elongate and 

 parallel with the cardinal edge, which is swollen into a well- 

 developed fulcrum. 



XIV. — Gleanings in British Conchology. 

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



[Continued from vol. i. p. 48.] 



[With a Plate.] 



Since the publication of my former paper on this subject, several 

 additions to the lists, both of species and localities, have occurred 

 to me; these I will now take this opportunity of recording. 

 They have been chiefly derived from the northern and southern 

 extremities of the British Isles ; and I have to express my best 

 thanks to my friends Mr. Barlee and Dr. Lukis in particular, as 

 well as to Mr. M' Andrew, Mr. Waller, Dr. Battersby, the Rev. 

 Ann. $ Mag. N. Hist. Ser. 3. Vol. ii. 9 



