PARTULA, SAMOAN ISLANDS. 263 



aa. Umbilical cavity small or moderate. 



b. Aperture about half the length; shell oblong- acu- 

 minate, the last whorl very indistinctly streaked 

 with greenish-yellow; 24x13 mm., aperture 12.9 

 mm. P. brazieri, no. 59. 



bb. Aperture more than half the length; shell ovate-- 

 conic, the last whorl greenish-yellow, spire brownish ; 

 17 x 9 to 18 x 10.3 mm., aperture 10 mm. 



P. gonochila, no. 60. 



Section SAMOANA n. sect. 



Evadne HARTMAN, Gatal. Genus Partula, 1881, p. 12, type 

 "E. bulimoides " = P. canalis Mouss. (preoc.) 



The shell is very openly rimate or umbilicate, dextral or 

 sinistral, with flatly reflexed lip and no parietal tooth. 

 Arboreal. Type P. canalis. 



The type species has -a short, triangular kidney, according 

 to Semper. The group may be related to the Partulae of 

 Huaheine, which have a similar kidney. 



Group of P. canalis. 

 53. P. CANALIS Mousson. PL 32, figs. 6, 7, 8, 10. 



Shell sinistral, umbilicate, elongate-conic, rather thin, striat- 

 ulate, not decussate, slightly shining, brownish. Spire conic, 

 regular; apex subacute, violaceous, suture bordered with a 

 white line, simple. Whorls 5%, nearly flat, the last large, 

 equal to five-fourths the spire, long, more convex at the 

 umbilicus, a little ascending in front. Aperture subvertical, 

 ovate-oblong, subeffuse below. Peristome white, flatly re- 

 flexed, moderately expanded, margins subparallel, columellar 

 margin long, somewhat folded and impressed in a canal above. 

 Alt. 29, diam. 14 mm. (Mouss.). 



Samoan Is.: Upolu (Graeffe, Garrett) ; Apia (C. N. E. 

 Eliot) . 



Partula canalis Mouss., Journ. de Conchyl. 1865, p. 172; 

 1869, p. 337 (with var semilineata, p. 338). PFR. Monogr. 

 vi, p. 155. GARRETT, Proc. A. N. S. Phila. 1887, p. 134 

 Partula conica brown variety, GOULD, U. S. Expl. Exped.,. 



