222 JOURNAL OF CONCHOtOGY, VOL. I3, NO. 7, JULY, I9II. 



Exhibits. 



By Mr. T- Wilfrid Jackson : A large specimen o. Unio picto7-tivi from the canal 

 at Marple, Cheshire, exhiliiling fine radial strialions on the anterior half of the 

 shell. The stri^, which radiate from the umbo, are only slightly visible on the 

 umbonal region, but become more and more apparent as the ventral margin is 

 approached. 



By Dr. K. Tlurlstone Jones : Pisidium caseiianiiin and P. lilljehorgi from 

 Though Mare, Cllengariff, Co. Cork ; P. obiiisale from a small wayside pond near 

 Lough Mare, Qlengariff; P. sfeeabiicln from a roadside pool, Coomerkane Valley, 

 CJlengariff ; and P. hibenticinii from Lough Nagarriva, Co. Kerry, all taken during 

 March and April last. 



By Rev. Lewis J. Shackleford : Valuta vesper/ilio L., type, and vars. serpen- 

 tina \a\w., pellis-serpcntis Lam. (specimens no- 118 mm. long), and wzVzV Lam., 

 and a large number of intermediates, illustrating the extreme variability of the 

 species ; /'. zebra Leach from Geelong, and its var. lincata Leach from Tasmania ; 

 V. nivosa Lam., and I.yria{Eiiaeta) /^c^/'ft Barnes, west coast of Central America^ 

 an unusually fine specimen. 



By Mr. G. C. Spence: Achatina knorri from F'ernando Po ; Placostylns bavayi 

 P. macfarlandi, P. alexander, and many other species in exceptionally fine condi- 

 tion, including /'. cleryi — a magnificent specimen with tlie delicate green cuticle 

 intact, a state in which this shell is seldom seen, the specimens usually met with 

 in collections being rose-pink in colour, owing to loss of epidermis ; in Tryon's 

 Appendix to his Monograph on Placostyhis, in the " Manual of Conchology," he 

 describes and figures an almost identical example from the collection of Dr. J- C. 

 Cox, which has retained the cuticle on all V)ut the apical whorls, and this appears 

 to be the first specimen of this rare form he had seen. 



By Mr. R. Standen : An interesting series of Cypnea mauritiana, dredged 

 alive off the coast of Mauritius, showing transitional growth-stages from specimens 

 an inch in length to fully adult ; also some well-marked Nan'ma inversicoloi- from 

 Mauritius. 



By Mr. R. Cairns : A very fine series of Land Operculates, including Cyclo- 

 ■phoriis kitbaryi, C. rafflesi, C. leucostomtts, C. aqitila, C. boriieeiisis, C. coch- 

 1-anei, C. zolUvgeri, C. s/iiiihi, C. ibyateiisis, C. turbo, C. perdix, C. cyheiis, C. 

 ptiiictatiis, Acroptychia aqtiivoca, Leiubptychia leai and L. foliaceus. 



By Mrs. Gill: Coims Jloridanits, C. orbignyi, C. amniiralis, C. grauiilatus, 

 C. caucellatiis, and other interesting species. 



By INIr. Harry Allan : Vitrea alliaria. Helix neiitoralis var. rubella 00300, 

 and other forms ; Splueriuin corneicm, Physa Jiypiioriim, Liiniura pt'reji^er, and 

 rianorbis spirorbis, from Cheadle Heath near Manchester ; Helix aspersa and var. 

 zoiiata, H. neiitoralis var. olivacea, CochlicOpa litbrica, Clansilia bideiitala, Jaminia 

 cylitidracea, Helicella acuta, Vitiea cellaiia, V. ///r/j'^z— of large size and brilliant 

 coloration — from Great Orme's Head, Llandudno ; series of FI. nemoralis and 

 H. pisana from various localities ; //. arbiistornin type, and var. flavesceiis from 

 Derbyshire. 



By Mr. C. H. Moore : A number of land shells collected in the neighbourhood 

 of Dyserth and St. Asaph, Flintshire, during Easter week of this year. 



In the Special Exhiijit oi Neritiiia, the fine series in the Manchester Museum, 

 " Layard," and " R. D. Darbishire " collections were shown by Mr. R. Standen, 

 who pointed out the various characteristics of the different sections into which 

 the genus is divided, their habitats, and geographical distribution. Specimens 

 were shown by other members, including a fine series of eighteen species received 

 by Mr. Collier from the late Mr. Andrew Garrett, of Huahine, who had collected 

 them in the South Sea Lslaiids. 



