1913.] NATURAL SCIENCES OF PHILADELPHIA. 645 



Opeas opella Pilsbry and Vanatta. 



Proc. A. N. S. PhU., 1905, p. 785, fig. 1; Man. Conch., (2), XVIII, p. 186, 

 pi. 24, fig. 36. 



About forty specimens of this species, originally reported from the 

 Hawaiian Islands, were taken in the park at Para. Dr. Pilsbry 

 kindly made the diagnosis, so there is no doubt of their identit}'. 

 In the Manual of Conchology, p. 187, Dr. Pilsbry saj^s, "I do not 

 regard 0. opella as a native Hawaiian species." It is difficult to 

 imagine the route by which this species travelled from Para to the 

 Hawaiian Islands, but it was probably carried on plants. 



Genus LEPTINARIA Beck. 

 Xeptinaria lamellata (Potiez et Michaud). 



Achatina lamellata P. and M., Galerie de Moll, ou catal. Moll, et Coq. du 



Mus. de Douai, I, p. 128, pi. 11, fig. 8 (18.38). 

 Leptinaria lamellata P. and M., Pilsbrv, Man. Conch., (2), XVIII, p. 288, 



pi. 42, figs. 39, 40; pi. 4.3, fig. .50. " 



Seven specimens were taken at Camp 39, ]\I. & M. R. R. 



Leptinaria lamellata concentrica (Reeve). 



Achat i I, a connntrlea Rvo., Conch. Icon., V, pi. 19, fig. 106 (June, 1849). 

 Leptinaria lamellata concentrica Rve.. Pilsbrv, Man. Conch., (2), XVIII, 

 p. 290, pi. 46, figs. 1-4. 



Two specimens were taken at Camp 39, M. & M. R. R., three at 

 Ttacoatiara and ten near the water works of the city of Pard. A 

 single dead specimen, taken at the Serra do Erere, was sent from the 

 Goeldi Museum. 



Xeptinaria perforata n. sp. PI. XXI, fig. 11. 



Shell l)roadly perforate, rather coarse, dirty white, but showing 

 slightly translucent in the young specimen ; coarsely, rather distantly 

 striate, with numerous fine intermediate striulse showing under a 

 glass; striae slightly retractive, arcuate, and becoming sinuous on 

 the lower whorls, clipping deeply into the broad and deep umbilicus. 

 Whorls Qh, of which the embryonic 1| are smooth, or with a trace of 

 spiral marking showing under a glass; vertical striae beginning on 

 the second whorl and becoming strong on the third; whorls very 

 ■convex above, almost shouldered, but less convex below; sutures 

 •deep, but not impressed. Aperture irregularly trapezoidal, slightly 

 broader below; outer lip simple, thin, forming nearly a right angle 

 with the parietal wall, but quickly descending and becoming sinuous; 

 •columella nearly straight, slightly reflected, but free from, and 

 scarcely covering the umbilicus; a rather broad, thin parietal callus 

 joining the extremities of the peristome and extending over the 

 columella. 



