PARTULA, MOORE A. 211 



ward, where it is found in company with lineata and tcrniata. 

 The same valley, which is about two miles from Vaianai, is 

 the limit of the range of the latter species on that part of the 

 island, and hybrids between it and elongata are rather com- 

 mon, the same as between garrettii and thalia at Raiatea. To 

 the eastward of Vaianai it ranges throughout the small val- 

 leys for a distance of several miles, as far as Oahumi, the 

 specific centre of strigosa." (Garrett). 



Partula elongata PEASE, Amer. Jour. Conch., 1866, p. 196; 

 1867, p. 81, PI. 1, fig. 2; Proc. Zool. Soc., 1871, p. 473.- 

 SCHMELTZ, Cat. Mus. Godeff., iv, p. 72. PFEIPFER, Mon. Hel., 

 viii, p. 196. GARRETT, J. A. N. S. Phila. ix, 1884, p. 68- 

 Partula lineata, CARPENTER (not of Lesson), Proc. Zool. Soc., 

 1864, p. 676. Partula tcuniata HARTMAN (not of Morch), 

 Obs. Gen. Part., Bull. Mus. Comp. Zool., ix, p. 188 (part).- 

 P. gracilior Pease label in A. N. S., HARTMAN, Bull. Mus. 

 Comp. Zool. ix, p. 183 (as syn. of gracilis) . 



This form seems to intergrade perfectly with P. taeniata, 

 of which I would think it a subspecies, so far as I 

 can judge without detailed study of the colonies in the 

 field. However, Garrett writes "I cannot agree with Dr. 

 Hartman in uniting this species with tceniata. It is only 

 through hybrids between the two species that the inoscula- 

 tion takes places. Examples taken in any of the valleys 

 not inhabited by t&niata prove at once its distinction." 



The type lot received from Pease contains three shells 

 measuring 



Length 18.5, diam. 9, aperture 9.3 mm., 5 whorls. 



Length 17.2, diam. 8.8, aperture 9.2 mm., 4% whorls. 



Length 16, diam. 8.1, aperture 8.9 mm., 4% whorls. 



One shell is corneous-brown with inconspicuous narrow 

 darker streaks, another is corneous-white with white streaks 

 on the last whorl, while the third (fig. 6, and A. J. Conch, iii, 

 pi. 1, f. 2) is dilute brown with indistinct, wide whitish 

 corneous streaks. All have the dense, minute spiral sculpture 

 of taniata and its allies. The whorls are not very convex, 

 last one more or less flattened below the periphery, very con- 



