264 PARTULA, SAMOAN ISLANDS. 



Moll., p. 82, pi. 6, f. 88. Evadne bulimoides Less., HARTMAN, 

 Cat. Gen. Partula, 1881, p. 12, 13, fig. ; not of Lesson. 



This species differs from P. conica by its longer, more slen- 

 der spire, absence of spiral striae except on the embryonic 

 whorls and base, the darker tint, etc. It is said to be in- 

 variably sinistral, and restricted to the island Upolu. 



The color is greenish-yellow with more or less chestnut suf- 

 fusion, sometimes darker in narrow streaks. The spire is 

 darker, reddish brown; suture margined with a white line, 

 narrower than in P. conica. The peristome is flesh-tinted, 

 not so broad as that of P. conica, and the columella is gut- 

 tered at its junction with the body. The umbilicus is ample, 

 as in P. conica. Figs. 6 and 7 were drawn from one of the 

 original lot collected by Schmeltz. Specimens measure as 

 follows. 



Length 28, diam. 17, aperture 16 mm. ; 5% whorls. 



Length 27, diam. 16.5, aperture 16.3 mm. ; 5y 2 whorls. 



Length 28.3, diam. 16.8, aperture 15 mm. ; 5% whorls. 



Length 25.8, diam. 15.8, aperture 14.7 mm. ; 5% whorls. 



A single specimen before me (pi. 32, fig. 8) has a much 

 shorter spire than canalis, not attenuated as that is. The 

 color is dark chestnut, the spire dull dark purple. It is 

 spirally striate below the periphery. Length 23, diam. 15, 

 aperture 13.3 mm. ; whorls slightly over 5. Upolu. This may 

 represent a distinct subspecies. 



53a. Var. BICONICA Pils., n. v. PL 31, figs. 6, 7. 



Some specimens collected by the United States Exploring 

 Expedition differ from canalis by having the last whorl more 

 swollen above the periphery, tapering to the base, and there- 

 fore distinctly conic; the umbilicus is much narrower, and 

 the plane of the peristome is more oblique. 



Length 28.8, diam. 18, aperture 17.5 mm. ; 5% whorls. 



Length 28, diam. 18, aperture 16.9 mm. ; 5% whorls. 



536. Var. SEMILINEATA Mousson. A little smaller, the last 

 whorl wavy-lineolate at the base. Color varying from pale 

 to dark corneous. Tutuila (Mousson) . 



