MONOGRAPH OF THE GENUS 

 PUPIN A. 



Char. Gen. Molluscum terrestre ; testa sub-cylindrica, vitrei, 

 nitidissima ; anfractibus quinque ad sex, penultimo inflato, ultimo 

 paululum coarctato ; apertura circulari, margine crasso, reflexo, ad 

 basin columellae inciso vel emarginato ; operculo corneo, spirali. 



A genus of small pupiform land shells, with a round spiral oper- 

 culum, generally having an incision at the base of the columella ; 

 differing from those species of Cyclostoma which are similarly 

 shaped and which have a similar incision, in the glassy enamel 

 which covers the shell, and fills up the suture of the spire. 



The first species described under this generic name was P. Ke- 

 raudrenii, published by Vignard, in the " Annales des Sciences." 

 1829. Mr. Grateloup subsequently described P. Nunezii under the 

 generic name Moulinsia, neither of these naturalists being ac- 

 quainted with the operculum. All the species here described, with 

 the exception of P. humilis and P. Keraudrenii, were recently 

 brought to this country by Mr. Cuming from the Philippines. 



DESCRIPTIONS. 



Sec. I. The axis of the spire turned backwards. 



Sp. 1. P. Nunezii (pi. iv. f. 8,9, 10, 11.) Moulinsia Nunezii, 

 Grateloup. Ann. Soc. Linn. Bordeaux, 1840. 



T. globosa, obliqua; apertura magna, margine valide expanso, 

 reflexo, complanato, incisura triangulari penitus diviso ; labio co- 

 lumellari concavo ; anfractu ultimo prope aperturam sub-compla- 

 nato. 



Obliquely globose, with the aperture large ; the margin reflected ; 

 expanded, flattened ; notch deep and triangular, nearly dividing 

 the peritreme ; the last whorl rather flattened in front. Varying 

 from bright orange to purplish cream colour and dark brown. 

 Found on leaves of small plants and low bushes in several of the 

 Philippine Islands. 



2. P. pellucida (pi iv. f. 18, 19, 20.) Zool. Proc. 1842. 



T. obliqua, sub-globosa, pellucida ; spirse axe valide retrorso ; 

 anfractu penultimo elevato, ultimo complanato margine reflexo, in- 

 cisura diviso ; columella lata, convexa. 



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