96 JOURNAL OF CONCHOLOGY, VOL. I5, NO. 3, JULY, I916. 



Paper Read. 



" Onoba cytaatodes, a new species from the Antarctic," by J. C. Melvill, M.A., 

 D.Sc, and R. Standen. 



Exhibits. 



By Mr. G. C. Spence : Shell, eggs and embryo of Obelisais {Enonyma) 

 platyacme Melv. & Pons., from Pondoland ; and a large number of species of 

 Macroceramiis and Microceraimis. 



By Messrs. J. C. Melvill and R. Standen : Type specimen of a new Onoba, to 

 illustrate their paper. 



By Mr. C. H. Moore : Limnaa peregei- var. lacitstris, Ancylus fliiviatilis, Pupa 

 cylittdracea, Balea perversa and Vitrea cellaria from Keswick. 



In the special exhibit of Ancilla a fine series was shown from the Manchester 

 Museum Collections, and many of the rarer species were shown by Mr. J. C. 

 Melvill, including one of the finest specimens of Ancilla cingidata ever seen, for- 

 merly in the Prevost Collection ; A. booleyi Melv. & Sykes, with operculum ; and 

 A. optiinaSoV'/., one of the finest and rarest species in the genus. Mr. C. 11. Moore 

 exhibited fossil Ancilhr from the Paris Basin. 



Physa heterostropha Say in Bucks. — With reference to the specimens of 

 Physa heterostropha Say, which I found recently at Aylesbury and some of which 

 Mr. J. W. Taylor kindly exhibited on my behalf at the Annual Meeting, it may 

 be of interest to note that these were taken from spots located over a considerable 

 length of the canal there, and not at any particular point or points where warm 

 water or exhaust steam might enter, as is sometimes the case with regard to the 

 habitat of this species. With the exception of one example, which still contained 

 the remains of the dead animal, the shells were young living specimens. As I 

 believe the species has not been taken so far south outside Kew Gardens (even 

 allowing these examples to be identical with the present species), and, in any case, 

 the shell being new to Buckinghamshire, the find is worth recording. — A. E. 

 Salisbury [Read before the Society, Nov. 10, 1915). 



Pisidium lilljeborgi in Nant Ffrancon, Carnarvonshire.— In June, 1915, I 

 visited Llyn y Cwm, a little tarn that Hes imder the precipitous face of Y Garn at a 

 height of somewhat above 2,000 feet. P. lilljeborgi |was fairly plentiful in the 

 patches of silt that occur here and there in its stony bed and I took a few specimens 

 of/". nitidu?n, but the only other mollusc I could find was Ancylus fliiviatilis and 

 that was scarce. I have already recorded the occurrence of P. lilljeborgi in Llyn 

 Idwal {antea, vol. 13, p. 353), and can now add Llyn Ogwen (1000 feet) where I 

 found it in abundance in one spot. The Idwal and Ogwen shells are similar in 

 appearance, very swollen at the umbones, strongly striated, and glossy. The shells 

 from Llyn y Cwm are larger but less swollen, not so deeply striated, and entirely 

 without gloss. I am once more indebted to Mr. B. B. Woodward for his kindness 

 in identifying the specimens.— C HAS. Oldham [Read before the Society, Dec. 8th, 

 1915)- 



Rossia macrosoma in Carnarvonshire.— On September nth, 1915, 1 picked 

 up a living R. macrosoma on the beach at Afon Wen. This cephalopod is a deep- 

 water rather than a littoral form but is sometimes stranded after heavy storms. 

 The presence of the animal alive and uninjured, just above the water-line on the 

 shore of this shallow bay, in a dead calm — thcue had been no wind for some days 

 and the sea was quite smooth — is perhaps worth recording. — Charles Oldham 

 {Read before the Society, February 9th, 1916). 



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