203 



NOTES. 



jS"otk on Fistulana mumia perforating a valve of a Dosinia. 

 {Read 14tk December, 1906.)— In the fifth vohime of these " Proceedings " 

 (p. 345) Messrs. Sowerby and Fulton gave a brief notice of a specimen of 

 this species, which was shown to have bored its way though a Mitra. 

 Another instance of the perforating power of the Fistulana has for many 

 years been in the British Museum. A small valve of a species of Dosinia, 

 15 mm. in length, has been bored through by &Fistulana (Fig. 1), and is firmly 

 attached to the tube about three-quarters of an inch from the posterior 



end. The specimen was purchased at the sale of Captain Belcher's 

 collection in 1851. No locality accompanies it, but it was probably 

 obtained somewhere in the China Sea, where he collected so largely. The 

 Dosinia may be the young of D. excisa, Chemn., as it has the very large 

 superficial lunule so characteristic of that species. 



A curious reparation of a tube after being broken is shown in Fig. 2. 

 The specimen, now in the IMuseum, came from Singapore, and formed part 

 of the collection of the late Surgeon-Colonel Samuel Archer. 



E. A. Smith. 



Note on Paludestsina Jenkinsi. [Read 9th Noremher, 1906.) — 

 The British Museum received from Mr. H. F. Fermor last October about 

 200 specimens of this species which had been taken from water-pipes in 

 South Loudon. They seemed, at first, so unlike the typical form of the 

 species that I was inclined to regard them specifically distinct. On 

 comparing them, however, with specimens from the North of Ireland, 

 received from Mr. R. Welch, certain individuals were met with which 

 appeared to link these shells with P. Jenkinsi. The specimens were found in 

 a 4 inch main in Grummant Road, Peckham, a district of South London. 

 These pipes have been laid down between thirty and forty years, but we 

 do not know how long the shells have existed in them or how they got 

 into such a position. The water is drawn from the Thames at Hampton, 

 and there passed through the sand filter-beds, thence is conveyed to 

 the Nunhead reservoirs, and then pumped into the service-mains. The 

 service is on the continuous supply system, so that the pressure in the 

 pipes would be about 40 pounds to the inch. There would probably not 

 be a great flow of water through this particular main, as it was closed at 



