Mr. R. T. Lowe on new Species of Cyclostoma. 117 



riensium Ferri (Hierro) ad locum "El Golfo" dictum, necnon 

 Palmse in convallibus "Barranco de Agua" et " Barr° de Galga" 

 dictis. 



Three examples of this very distinct little species were found 

 first by Mr. Wollaston, when we explored together, in February 

 1858, for three or four days, the vast and magnificent sylvan 

 amphitheatre of El Golfo, on the north-west coast of Hierro ; 

 and we each discovered a few more subsequently in two locali- 

 ties in Palma, where it appears, like several Helices, to have 

 escaped the extensive, though by no means "exhaustive," re- 

 searches of Herr Blauner. 



Opercle (in a single Hierro example) pale yellowish horn- 

 colour, thin, with membranous colourless edges, and obscurely 

 spiral. 



6. C. Lyonnetianum, Lowe. 



T. conoideo-pyramidata trochoidea sericeo-nitens solidiuscula angu- 

 lato-carinata anguste rimato-perforata fusco-coffeacea ; spira ele- 

 vato-producta pyramidata, anfr. sequicrescentibus convexo-planatis 

 sequaliter et concinniter exilissime et creberrime spiraliter, inse- 

 qualiter et rudiuscule v. subgrossiuscule transverse striatis ; sutura 

 distincta impressa ; apert. spira distincte breviore. — Svn. Diagn. 

 15. n° 70 ; Catal. Moll. Mad. 217 ; Pf. Mon. Pneum. 52. n°89. 



Long. 4-5, diam. 3-3^ mill. ; apert. 1 j-2, spira 2|-3 longa ; anfr. 

 5-5±. 

 Hab. in rupibus declivibusque irriguis convallium (Rib. de S ta 



Luzia et Rib. do Inferno) Maderse recens, necnon fossilis ad 



Canical. 



Opercle thin, obscurely spiral, pale yellowish or horn-colour, 



with whitish membranous edges. 



7. C. trochoideum. 



T. abbreviato-conoidea exacte trochiformis nitida tenuiuscula acute 

 angulato-carinata imperforato-rimata, rima fere v. omnino clausa ; 

 spira conico-acuta, anfr. insequicrescentibus planatis, striolis spi- 

 ralibus creberrimis exilissimis cequalibus alias transversas tenues 

 exoletas crebras subinsequales subtilissime decussantibus, ultimo 

 subito majore antice sursum subdilatato abrupte ascendente, subtus 

 fere planato ; sutura distincta parum impressa antice subito ascen- 

 dente ; apert. spira vix breviore. 



Long. 4^-4 \ y diam. 4-3£ mill. ; apert. 2, spira 2^-2-i- longa; anfr. 5^. 

 Hab. in convalle "Rib. do Inferno" dicta orse. Septentr. Maderse. 



Described from three living examples (wanting the opercle), 

 kindly lent me for the purpose by T. V. Wollaston, Esq., who 

 received them from S r . Moniz and Mr. T. S. Leacock. They 

 were discovered in the locality above recorded in 1859 by a 

 German naturalist, whose name, unfortunately, Mr. Wollaston 

 does not precisely recollect, but which otherwise would have 



