172 PARTULA, MARQUESAS ISLANDS. 



Whether the specimens were actually taken on Huapu 

 ("Woapo") or not remains uncertain. 



Compared with the type lot of Pease 's P. recta, P. strigata 

 is thinner, darker colored, dull brownish instead of pale green, 

 with a narrower flesh-tinted peristome. The two lots seem 

 to be specifically distinct, until studied in connection with a 

 large series from Nukahiva, subsequently obtained, which 

 seem to be partially intermediate. 



3a. P. STRIGATA OBESIOR Pils. PI. 30, figs. 11, 14, 15, 16. 



A lot of 27 examples from Nukahiva consists of shells which 

 are generally more globose than either recta or strigata, thin, 

 variable in color as follows : 



a. White, denuded of cuticle (fig. 14). 



6. White, 'Covered with a very thin straw, cream or brown 

 tinted cuticle, the spire often corneous (fig. 15). 



c. Busty brown, having a whitish belt below the suture (fig. 

 16). 



d. Dark brown (fig. 11). 



In nearly all of this lot the lip is thin and narrow, as in 

 strigata. Specimens measure: 



Length 21,. diam. 12.8, aperture 11.8 mm., whorls 5. 



Length 20.8 diam. 12, aperture 11 mm., whorls 5. 



Length 19, diam. 11.8, aperture 11 mm., whorls 5. 



Length 18.5, diam. 10.5, aperture 10 mm., whorls 4%. 



Length 17, diam. 10.5, aperture 10 mm., whorls 4%. 



A few examples among these shells are typical recta. 

 Probably a collector who would keep his shells from different 

 colonies separate would find that there are several races on 

 Nukahiva. 



3&. P. STRIGATA RECTA Pease. PI. 30, figs. 9, 10. 



The shell is openly umbilicate, acutely long-ovate, solid, the 

 typical form white under a very thin, very pale green cuticle, 

 which is often deciduous on the last half whorl. The spire is 

 straightly conic, whorls S 1 /^ convex, the last one equably 

 curved from suture to base. The initial half whorl is smooth, 



