THE NAUTILUS. 137 



Oleacina o. straminea Desh. (S, B). 

 Oleacina solidula Pfr. (S, B). 

 Oleacina incisa Pfr. (B). 

 Rectoleacina suturalis Pfr. (S). 

 Varicella (Pich.) gracillima Pfr. (S) 

 Varicella (Pich.) acuticostata horrida Pils. (B). 

 Helicina adspersa Pfr. (S, B). 

 Emoda submarginata Gray (B). 

 Alcadia minima Pfr. (S). 

 Alcadia rotunda Orb. (var. ) (B). 

 Eutrochatella sloanei Orb. (S, B). 

 Eutrochatella rupestris Pfr. (S). 

 Eutrochatella conica Pfr. (S, B). 

 Proserpina depressa Orb. (B). 

 Megalomastoma apertum Poey (B). 

 Chondropoma poeyanum Orb. (S). 

 Chondropoma (?) n. sp.? (B). 

 Chondropoma ottonis Pfr. (S, B). 

 Ctenopoma rugulosum Pfr. (S, B). 

 Ctenopoma nodulatum Poey (B). 



Had I gathered some dirt in proper places several minute 

 species could no doubt have been added. 



The subspecies anafensis of Uroc&ptis cyclostoma differs from 

 type only in the riblets. The number of these is about the 

 same, but instead of "threadlike" they resemble little knife- 

 blades projecting up from the whorl and with their sharp edges 

 more or less bent forwards in the direction of the shell growth. 

 They are oblique as in the type but describe a double curve 

 from suture to suture. 



The form anafensis of Pilsbry's Microceramvs perconicus is 

 smaller, with narrower, more convex whorls, and somewhat 

 flatter base. 



The Chondropoma left without a specific name is a puzzle. It 

 belongs to the peoyanum-pfeifferianum-pidum complex Avith cer- 

 tain peculiar characters of each, the facies of all, but is not any 

 one of the lot — or all of them. The reflected peristome is the 

 trouble. I dare not name it. 



