RORBUCK : CENSUS AUTHENTICATIONS. 91 



two genera is merely another example of convergence. He would, therefore, 

 restrict Ag)iatha as a group to contain the Oleacinidce and Testacellidcc, and adopt 

 I'ilsbry's term Agiiathoinortiha for tlie group consisting of Aperidce, Rhytididcc, and 

 Streplaxidi!. 



With reference to the publication of Rimmer's "Land and Freshwater Shells" 

 (v. supra p. 52), Mr. John Grant, of George IV. Bridge, Edinburgh, informs me 

 that he published a reprint of the original edition in 1907, and that this reprint is 

 still in stock. 



♦♦•••♦ 



CENUS AUTHENTICATIONS. 



By W. DENISON ROEBUCK, M.Sc, F.L.S., Hon. Recorder. 



All the records here given are based upon examples submitted to the official 

 authenlicalors : myself for slugs only ; Mr. F. Taylor for Paliidestrinida: ; and 

 Mr. John W. Taylor for all other species. 



Anglesea : Mr. E. D. Marquand has submitted several examples of Paludestrina 

 stagnalis from Holyhead. 



Berkshire: Mr. W. Holland has presented to the Voucher Collection a few fine 

 Aplexa hypnoru7n from a tiny stream in Pepper Lane, Reading, and a number 

 of small examples from a brook at Three Mile Cross, near Reading. 



Carnarvonshire: Mr. C. Oldham has submitted three examples of Zonitoides 

 excavaitis and one young Sphyradinm edentiihini which he collected at Clynnog 

 Fawr on the 29th July, 1915. He has also sent, and presented to the Voucher 

 Collection — Planorbis alhiis from the River Soch at Llanengan, several, 3rd 

 October, 1914; two SphcEriian corneiim and three Pisidiiim stibtruncatiim from 

 Llangian, 7th October, 1914 ; several Siccciitea elegans from Nevin, 27th Sep- 

 tember, 1914 ; two Pupa anglica from Forth Oer, Aberdaron, 4th October, 

 1914, and one from Nevin, 30th September, 1914 ; and a few Helicella acuta 

 with two var. strigata from Forth Dinlleyn, Nevin, 28th September, 1914. 



Channel Islands : Mr. E. D. Marquand has submitted a few examples of Plan- 

 orbis crista taken by himself in Guernsey ; and a few Ovatella bidentata from 

 Alderney. 



Cheviotland : Mr. A. M. Oliver has presented to the Voucher Collection an 

 example of Acatithinula aculeata turned up after much search in Hermitage 

 Woods, Warkworth, i6th August, 1913 ; and one of Pisidiuui henslowaniim 

 found along with P. amniciitn in the Coquet, near Warkworth, June, 1910. 



Cornwall East : Mr. J. H. Adams has submitted an example of Ccccilioides 

 acicula,- obtained on the cliff above Fortnadler Bay ; some Hygrotnia hispida 

 from •the sand-swept cliff at Seaton Beach ; a couple of Vertigo antivcrtigo 

 found in a marsh in the Hessenford Valley — all near Looe ; also Zonitoides 

 excavatus and var. vitrina, which are equally common in a small wood not far 

 from Doublebois just off the main Bodmin Road, three-and-half miles west of 

 Liskeard. 



Cornwall West : Mr. E. D. Marquand has presented to' the Voucher Collection 

 the specimen of Helicigona arbustoruvi which he took in May, 1880, in a deep 

 gully on the coast near Morvah, about six miles north-west of Fenzance. 



Cumberland : The Rev. W. Wright Mason submitted a half-grown typical 

 example oi Limax Jiavus which he took at Fenrith, 20th April, 1915. He has 

 also sent fine examples of Pisidiuin obtusale, and of P. fontinah, both taken at 



