Rev. R. T. Lowe on new Canarian Land-Mollusca. 109 



angulato-carinato antice rotundato hand aut vix descendente ; 



apert. lunalo-ovali labris remotis disjunctis ; perist. subincrassato 



subreflexo ad axin subdilatato umbilicum partim obtegente. 

 Diam. maj. 24, min. 20, alt. 15 mill. Anfr. 6. 

 Hab. in torrente vulcanica (lava-stream) in convalle supra Portum 



"Pozo Negro" dictum Fuerteventurae : v.ni. 



I could find only five or six dead and bleached examples of 

 this very distinct species. Its only recorded Canarian near ally 

 (except H. saponacea) is the Gomeran H. Gaudryi, D'Orb. 



11, H. saponacea. 



T. obtecte perforata orbiculato-depressa subtus convexior, jun. sub- 

 carinata, adulta vix aut obtuse angulata lucidiuscula exilissime 

 granulato-scabra, subtus leevior pallidior circa axin opaco-albida, 

 supra corneo-flavesceus subpeliucidiuscula anguste 3-fasciata; 

 spira convexo-depressa, sutura distincta simplici (nee marginata), 

 anfr. A\ vix convexiusculis, ult. obsolete angulato antice abrupte 

 deflexo ; apert. lunato-subquadrata labris remotis, inferiore recti- 

 usculo stricto ad axin late albo-reflexo umbilicum penitus obte- 

 gente ; perist. lato-reflexo piano albo, axin versus incrassato-calloso 

 interdum plica relevata intus aucto. 



Diam. maj. 17, min. 15, alt. 9 mill. Anfr. A\\\x 5. 



Hab. sub lapidibus in sterilibus apricis Canarise Magnse australioris ; 

 sc. in excelsioribus (Pinetis) S" Bartholomsei, in submaritimis ad 

 El Cbarco prope Maspalomas, Arguineguin, &c. 



Resembling H. Pluionia in general shape and character, but 

 smaller, flatter, without keel or margined suture, more regularly 

 closely or distinctly scabrous, and with the umbilicus always 

 completely closed in the adult shell. It connects the present 

 group with the following, in which perhaps it might be placed. 



§ Mycena, Alb. 



12. H. psathyra, 



T. majiiscula depressa obsolete v. haud carinata obsolete et subtiliter 

 malleata tenuis fragilis lucida Icevis (juniore granulata) oblique 

 crebristriata interstitiis hinc inde obsoletissime aliquando spiraliter 

 interruptim striolatis fulvo- v. corneo-viresceus pallidiuscula fusco 

 pallide et obscure 4-5-fasciata, subtus fulvo-virescens ; spira convexo- 

 depressa, anfr. 5 planis, ult. obsoletissime aut non carinato antice 

 valde deflexo et pone labrum valde et profunde constricto-sufcato, 

 sutura subobsoleta ; apert. oblique depressa deltoidea subsinuata ; 

 perist. latissime expanso-limbato piano tenui fragillimo pallide 

 purpurascente v. albo ad basin medio dilatato-calloso intus sub' 

 prominente piano, labris convergentibus subapproximatis. 



Diam. maj. 22-24, min. 18-20, alt. 14-16 mill. Anfr. 5. 



Hab. in Canaria Magna australiore, prsesertim ad Mogan et Aldea 

 de San Nicolas sub saxis in locis aridis apricis. 



