MICRONESIAN NESOPUP^E. 335 



(Species of Micronesia.) 



32. NESOPUPA QUADRASI (Mlldff.). PI- 32, figs. 7, 8, 9, 10. 



Shell subperforate, oblong-ovate, thin, sculptured with very 

 delicate, rather widely-spaced riblets, silky, brown. Whorls 

 5, convex, slowly increasing, separated by a deep suture, the 

 last slightly ascending in front, compressed at base, distinctly 

 pitted behind the lip. Aperture nearly vertical, rounded- 

 triangular, the peristome well expanded, with a brown thick- 

 ening, the margins converging, right margin deeply sinuate, 

 with a noduliform callus. Angular lamellar rather high, 

 curving outward, and together with the nodule of the external 

 lip forming an elliptical sinulus; 2 parietal lamellae, one 

 strongly elevated, entering deeply, the other smaller; 2 colu- 

 mellar lamellae; 3 deeply placed palatal plicae, of which the 

 right one is rather long and lamelliform. 



Length 1.9, diam. 1 mm. (MUdff.}. 



Length 1.75, diam. 1.05 mm., aperture 0.8 mm. 



Marianne Islands: Guam (Quadras). 



Vertigo (Ptychochilus) quadrasi MOELLENDORFF, Nachr. d. 

 Malak. Ges., xxvi, 1894, p. 17. 



This species is closely related to N. moreleti, but it differs 

 by the presence of a small interpalatal fold, or in one speci- 

 men two, and the subcolumellar lamella which is rather deeply 

 placed (and may be a displaced basal fold). There is some- 

 times a suprapalatal fold, as in N. moreleti, these specimens 

 having 9 or even 10 teeth. The cuticular laminse are often 

 fugacious, and the surface then is somewhat pitted. 



This species has been distributed by dealers under the un- 

 published name Pupa marianarum Q. et M. 



33. NESOPUPA EAPENSIS (Boettger). PL 31, figs. 27, 28. 



"Differing from P. tantilla, Gould by the perforate-rimate 

 shell, oblong-ovate, the whorls more rapidly increasing, less 

 convex, the last nearly half the total length, hardly impressed 

 externally towards the aperture. The aperture is larger, 

 rather high, truncate-subovate, 5-toothed, the teeth not very 

 strong; angular small, rather deeply placed, scarcely con- 



