PARTULA, RAIATEA AND TAHAA. 231 



resent two of the type lot, received from Pease, no. 59452 

 A. N. S. P. 



32. P. THALIA Garrett. PI. 19, figs. 10-11, 13. 



"Shell compressly perforated, solid, ovate-conic, somewhat 

 shining, lines of growth rather smooth, and revolving incised 

 lines very fine and crowded ; whitish or yellowish horn-color, 

 with or without a purple-black apex ; spire rather short, coni- 

 cal, with plano-convex outlines, half the length of the shell; 

 suture slightly impressed; whorls five, flatly convex, the last 

 one large, subglobose. Aperture subvertieal, shortly subauri- 

 form; parietal region more or less glazed, and armed with 

 a white tubercular tooth; peristome white, moderately ex- 

 panded, thick, angularly ridged, strongly incrassated within, 

 sinuous above, and the margins frequently joined by a ridge 

 of callus. The columella is frequently slightly gibbous or 

 nodulous in the inner margin. Length 17, diam. 11 mm. 



"Var. a. Fulvous brown, with or without purple-black 

 apex. Rather rare. 



"Var. b. With brown base and sutural band. Not com- 

 mon." (Garrett). 



Raiatea: "The specific centre of this very abundant arbo- 

 real species is in Huaru valley, on the west coast of Raiatea. 

 It has spread along the well-wooded lowlands about two miles 

 north and one mile south of its metropolis, slightly over- 

 lapping the northern range of P. garrettii." (Garrett). 



Partula abbreviates PEASE, MS. (not of Mousson) coll. 

 Pease, 1863. Partula auriculata var., CARPENTER, Proc. Zool. 

 Soc., 1864, p. 675. Partula peaseana GARRETT, MS. (not 

 peasei, Cox). Partula thalia Garrett, HARTMAN, Cat. Part., 

 p. 7; Obs. Gen. Part., Bull. Mus. Comp. Zool., ix, pp. 188, 

 191, 192 (name only). GARRETT, Journ. A. N. S. Phila,, ix, 

 1884, p. 69, pi. 3, f. 46. 



"It is smaller, smoother, more shining, much less variable 

 in color, and the aperture is less auriform than P. auricu- 

 lata." The smaller P. garretti is probably its nearest ally, 

 but that is a narrower species with more oblique aperture,. 



