150 POLYGYRATIA. 



Helix (Qonostoma) supraplicata KOB., Nachr. D. M. Ges. 1882, 

 p. 123 ; .Kossm. Icon. N. F. iv, p. 15, t. 95, f. 530. 



This species agrees in the aperture with H. gougeti Terv., in 

 sculpture with H. tarnieri Morel. In the umbilicus it approaches 

 H. buvignieri Mich, (asturica Pfr.), but it is always somewhat open. 



H. BLANCI Pollonera. PI. 43, fig. 43. 



Shell flattened, openly umbilicated, brown, pilose; the spire 

 immersed in the middle. Whorls 6, convex, the penultimate a little 

 projecting. Aperture vertical, triangular, trisinuate ; basal lip 

 incurved, the outer lip having a thick tooth. 



Bassano and Schio, in Venetia, N. Italy. 



H. bland POLL., Atti dell a Soc. Ital. di Sci. Nat. xxvii, p. 78, 

 fig- 



This form is intermediate between H. obvohita and H. holoserica. 



H. UNINODATA Gredler, Nachrichtsbl. D. M. Ges. 1890, p. 36. 

 Unfigured. China. Somewhat allied to H. binodata Mlldff. 



POLYGYRATIA (Vol. Ill, p. 124.) 

 P. QUINQUELIRATA Smith. PI. 42, figs. 25-28. 



Shell discoidal, slightly convex above, narrowly, umbilicated 

 beneath, thin, greenish-yellow, shining. Whorls 7, slowly increasing, 

 convex, striated with growth-lines, indistinctly concave above the 

 periphery, scarcely descending in front, provided with three unequal, 

 light internal folds, and two strong parietal laminae ; aperture semi- 

 lunate, small ; peristome thin, scarcely expanded. 



Alt. 3, greater diam. 6, lesser 5? mill. ($w.) 



North end of Fernando Noronha and on Platform Island. 



Helix (Ophiogyra f) quinquelirata E. A. SMITH, Journ. Linn. 

 Soc. Lond. xx, p. 500, t. 30, f. 7-7 c. 



H. JANEIRENSIS Pfr. (Zeitschr. f. Mai. 1851, p. 128 ; Mon. iii, 

 p. 265) from Rio Janeiro (Macgillivray), seems to belong to the 

 group of IT. heligmoidea and eheilostropha Orb. It has not been 

 figured. 



H. HELICYCLOIDES Orb. Vol. Ill, pi. 26, figs. 10, 11, 12. 



The descriptions given by Pfeiffer in the Monographia iii, p. 107 

 and iv, p. 310 do not apply to this species. It is described by 

 d'Orbigny as thin, nearly diaphanous, very strongly striated trans- 

 versely above, nearly smooth beneath ; last whorl descending 



