Rev. R. T. Lowe un new Canarian Land-Mollusca. 107 



Ins. Lanzarotse, in foraminulis superficialibus basalti cis vesiculari- 

 bus praesertim latitans. 



The nearest ally of this very distinct and well-marked pretty 

 little species is the Madeiran H. lentiginosa. The numerous 

 fine thread-like or lamellar spiral striae resemble those of the 

 common sylvan Tenerifan H. circumsessa, Shuttl., which is, how- 

 ever, as distinct in habit as in habitat, belonging to the group 

 Lucilla. 



§ DiscuLA, Lowe. 



7. H. pulverulenta. 



T. orbiculato-depressa umbilicata carinata solidiuscula concinniter 

 crebristriata (nee granulata) cinerea fusco 1-2-fasciata fasciis ssepe 

 interruptis tessellatis, supra lentiginosa ; carina acuta simpHci 

 (nee limbata nee serrulata) submedia, supra expressa subsulcata ; 

 spira convexiuscula, anfr. 5 convexiusculis, sutura simplici (nee 

 marginata) distincta antice praesertim impressa ; umbil. parvo 

 angusto, pariete subangulato abrupte declivi ; apert. depressa 

 oblique lunato-ovali ; perist. simplici recto, labris subapproxiraatis 

 interruptis. 



Diam. maj. fS-7i, min. 5|-7, alt. 4-4| mill. Anfr. 4|-5. 



H. Argonautula, Webb et Berth. Hist. ii. 2, t. 2. fF. 13-15 (nee descriptionis, 

 nee ff. 16-18, quae veram H. Argonautulam, Webb, Syn. App. 21. no. 3, 

 designant). 



Hab. sub lapidibus in saxosis aridis apricis regionis " El Charco " 

 dictse prope Maspalomas in Canaria Magna australi, cum H. Des- 

 preauoni Orb. degeus rarior. 



Approaches nearest to H. granostriata, Mouss., in Hartung's 

 ' Geolog. Verhaltn. Lanzar. und Fuertev. ;' but it is perfectly 

 distinct in the want of granulated striae, in the rather deeply 

 hollow impressed suture, more convex volutions, and simply 

 sharp not limbate keel. From H. Argonautula, Webb, and H. 

 seiubalensis, Morelet, it is constantly distinguishable by its 

 raised (not flat tabellate) spire, its small narrow umbilicus, sim- 

 ple keel, and fine close-set even (not somewhat coarse, irregular 

 and flexuose) striae. 



§ TuRRicuLA, Beck. 



8. H. Mirand(B. 



T. aperte perforata s. subumbilicata subconico-dopressa v. depresso- 

 trochiformis, carina media, utrinque fere sequaliter convexa, supra 

 rugosa rudiuscula grosse oblique corrugato-costata, infra Isevior 

 ffiqualiter plicato-striata albida fusco 1-fasciata; spira subtecti- 

 for mi- depressa parum elevata, anfr. 5 planiusculis obsolete bicari- 

 natis, ult. carina superiore indistincta, inferiore media acuta grosse 

 plicato-crenulata, sutura distincta obsolete subcrenulato-plicata ; 

 perforatione aperta distincta cylindrica nee coarctata ; apert. de- 



8* 



