140 MR. G. NEVILL ON THE [Feb. 17, 



ultimo sat ventricosa, albidula, olim passim fusco fiammulata, 

 costata (costce parallelce, sat distaiites, validcB in anfractibua 

 medianis, in ultimo strictcB, magis apiiroximatcB, ac prope aper- 

 turam evanescentes) ; spira acuminato-producta ; apice IcBvi- 

 gato, obtuso, mamillato ; anfractibus 10, covvexis, lente crescen- 

 tibus, sutura profunda separntis ; aiifractibus medianis leviter 

 tumidis ; ultimo vix majore, rotundato, ad aperturam undique 

 dilatato ac expanso, et ad insertionem labri ascendente ; aper- 

 tura fere verticali, rotundata, exacte pervia, superne vix sub- 

 angulata ; peristomate acuto, intiis profunde leviterque incras- 

 sato ac fere undicpie expanso, marginibus cullo junctis, margine 

 columellari valde auriculato ac refiexo; operculo ignoto. 

 "Alt. 10, diam. 4 millim. 



"Couche a Helix paretiana, dans la trancheedu chemhi de fer, au 

 Cap Vieille, entre Roquebrune et Monaco." 



I found this species rather scarce in deposit D. My limited 

 knowledge of the European species of this genus hardly entitles me 

 to pronounce an opinion about it; I will only say that my subfossil 

 form from deposit D is indubitably, specifically, quite distinct from 

 that which abounds in the other deposits, and which M. Bourgui- 

 gnat informs me is the Pom. septemspiralis. I am further indebted 

 to my distinguished friend for informing me, in litt., that Pom. lier- 

 culceus is most nearly allied to Pom. simonianus, from which it can 

 be distinguished by its greater size, stronger and more regular sculp- 

 ture, different coloration (approximating much nearer to that of 

 Pom. septemspiralis), more regularly acuminate spire, less convex 

 whorls, with suture less distinct, by its more ample aperture, " s'epa- 

 nouissant a I'instar du pavilion d'un cor de chasse, &c." 



Type in coll. cl. Bourguiguat ; also Indian Museum, and Coombe 

 Williams, Esq. 



Cyclostoma elegans, Miiller. 



Living specimens of this widely distributed species are to be found 

 near Menton, here and there, from the neighbourhood of the sea up 

 to some 2000 feet at least. Mr. Williams did not bring me back any 

 specimens from the higher altitudes. A single specimen my friend 

 found on the summit of the Grand Mont was a quite different 

 species (probably C. sidcalum, var.), closely allied to the also un- 

 doubtedly distinct (from C. elegans) subfossil forms from the zone 

 of H. paretiana and deposits A, D, &c., identified for me by M. 

 Bourguignat as his C. lutetianum and C. physetum. Certain sub- 

 fossil specimens I found in the couche marneuse of Cape Mortela, in 

 the upper stratum [that is, zone of H. aspersa, H. vermiculata, H. 

 cespitum, &c.], show how difficult all these forms are to correctly 

 classify. M. Bourguignat regards them also as belonging to his 

 C. physetum and C. lutetianum. I am convinced they are merely 

 subvarieties of C. elegans, and specifically quite distinct from their 

 above-quoted older relatives. 



Alt. 14|, diam. 10^; apert. (cum. marg.) alt. 7, lat. 6^ millim. 

 A living specimen of the ordinary type. 



