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



XIV. — Diagnoses of new Canarian Land-Mollusca. 

 By the Rev. R. T. Lowe, M.A. 



The following new species were discovered by Mr. AVollaston 

 and myself in the course of a few months' visit to all the different 

 islands of the Canarian group in the early part of 1858. Several 

 opportunities afforded me by Dr. Gray and Dr. Baird of consult- 

 ing the original types in the British Museum of the species pub- 

 lished by D'Orbigny in Webb and Berthelot's ' Histoire/ and a 

 careful examination of authentic examples of Mr. Shuttleworth's 

 subsequently described Canariaii shells, accorded me with equal 

 liberality and kindness by Hugh Cuming, Esq., enable me with 

 some degree of confidence to offer these still more recent dis- 

 coveries as genuine additions to the Canarian Molluscan fauna. 



Helix (L.). 

 Group or § Lucilla, Lowe. 



1. H. putrescens. 



T. orbiculato-depressa discoidea large et subperspective umbilicata 

 spadiceo-fusca nitida Iseviuscula, supra convexo-depressa obsolete 

 et tenuiter crebristriolata, subtus nisi circa umbiUcum Isevior; 

 spira plano-convexa apice albida, anfr. 5|^-6 coavexiusculis arete 

 transversim obsolete striolatis, ultimo baud descendente, sutura 

 distincta impressa ; umbilico largo spirali aperto \ diam. maj. 

 sequante ; apert. oblique lunata subdepressa s. latiore quam alta ; 

 perist. recto simplici tenui acuto. 



Diam. maj. 9-9i min. 8^-9, alt. A-A\ mill. Anfr. 5\-6. 



Hub. sub truncis putrescentibus humidis in sylvis convallis Galgae 

 Ins. Palmse rariss. Inv. T. V. Wollaston. 



Perfectly distinct from its nearest ally, H. textilis, Shuttl. 



§ Crystallus, Lowe. 

 2. H. vermiculum. 



T. parvula orbiculato-depressa discoidea perforata ecarinata omnino 

 vitrea nitidissima glabra; spira convexiuscula ; anfr. 4^-5 plani- 

 usculis leute v. seque crescentibiis, ad suturam distinctam pr^escr- 

 tim leviter v. obsolete striolatis; umbil. minimo cylindrico pro- 

 fundo vix subspirali ; apert. transversa depressa oblique lunari ; 

 perist. I'ecto simplici acuto. 



Diam. maj. 5-6, min. A^-b\, alt. 2|-3 mill. Anfr. 4^-5 j. 



Hah. sub lapidibus ad villulam "La Dehesa" dictam propc Portuin 

 Orotavfe Ins. Tenerifre. 



Intermediate in some sort between its frequent companions in 

 the above locality, H. cnjstallina and H. cellaria, Miill., having 

 a much smaller umbilicus than the former, and more equably 

 increasins; volutions than the latter. It has one volution and a 



