102 THE NAUTILUS. 



ciably, erubescens having well-developed outer cusps on first 

 laterals, and marginals with outer cusp bifid or trifid. 



We must, I think, conclude that Pilsbry's Leptaxis s. str. 

 is divisible into two subgenera, if not genera. Typical Lep- 

 taxis includes erubescens, furva, chrysomela, fluctuosa, and I 

 believe membranacea, which is not to be associated with Lam- 

 padia webbiana (Lowe). The other subgenus, Cryptaxis 

 Lowe, will include undata, vulcania, leonina, nivosa, psammo- 

 phora, wollastoni and forensis. Pseudocampylcra includes 

 lowei and portosanctana. 



The species of these groups require some revision, toward 

 which I offer a few notes, partly dealing with nomenclature. 



Pseudocampylcra lowei Fer. First described and figured 

 by Lowe as Helix portosanctana var. gigantea, but Lowe's 

 name is preoccupied in Helix, and cannot be taken up. 



P. lo-wei var. minor (Paiva). This variety, with whorls 

 flattened above, and spire depressed, is very distinct. Mr. A. 

 C. de Naronha gave me a specimen, and showed me others. 

 It occurs fossil at the Zimbral d'Areia, Porto Santo, and is 

 absent from other localities where lowei abounds. Paiva 's 

 varieties must apparently be recognized as named according 

 to the rules, although the word in italics is always the first 

 word of the diagnosis, and the proposal of definite names 

 seems more an accident of printing than a deliberate purpose. 



Leptaxis (Cryptaxis) groviana (Fer.). This must be the 

 name for the common Madeiran undata Lowe, the latter name 

 being preoccupied (Helix undata Gmelin). The name corru- 

 gata Solander cannot be taken up, as H. corrugata Gmelin 

 was earlier published. 



Leptaxis fluctuosa (Lowe). I can only conclude that this 

 is a distinct species, in spite of the existence of forms more 

 or less intermediate between it and L. chrysomela Pfr. On 

 Jan. 23 I was very fortunate in finding some splendid speci- 

 mens of L. fluctuosa, of unusually recent appearance, in the 

 gulch east of the Pico el 'Anna Ferreira, Porto Santo. The 

 largest has max. diam. 20 mm. One specimen, with max. 

 diam. 18.5 mm., is beautifully ornamented with interrupted 



