PARTULA, RAIATEA AND TAHAA. 237 



elongated specimens of P. fab a." Partula biangula Pease 

 MS., HARTMAN, Bull. M. C. Z. ix, 180, as synonym of faba. 

 No description. 



P. faba was first obtained when Captain Cook visited 

 Raiatea in 1769. Andrew Gurrett writes as follows : 



' * The type varies from straw-yellow to brownish yellow or 

 fulvous, with a broad basal and narrow sutural chestnut- 

 brown band. The most common bandless variety is of the 

 normal color varied with longitudinal darker strigations. A 

 variety of a uniform, whitish horn-color, as well as one of a 

 uniform chestnut-brown, sometimes approaching black, is not 

 infrequent. The lip is white, and the apex frequently tinted 

 with purple-black. 



They vary considerably in shape, as the following measure- 

 ments will prove : 



Length 25, diam. 14 mill. 



Length 25, diam. 12 mill. 



The average dimension is 25 by 13 mill. Out of about 

 6000 examples I found but one possessing the parietal tooth. 

 Hybrids between this species and radiata, fusca and naviga- 

 toria are not uncommon." 



Fig. 1 is a copy ol Martyn's type figure. Fig. 2 is a more 

 streaked example of the typical form. Deep brown (fig. 3), 

 and greenish-yellow (fig. 4), examples are also drawn. Figs. 

 5 to 8 are from a series collected by C. D. Voy, presumably in 

 one colony, the several color-forms being connected by inter- 

 mediate stages. 



P. subangulata, amanda, navigatoria and fusca might be 

 ranked as subspecies of faba without going far wrong. 



36. P. SUBANGULATA Pease. PI. 16, figs. 14, 15, 16. 



Shell smoother, more glossy and thinner than P. fal>a\ 

 chestnut-colored with darker streaks and a yellow band below 

 the suture ; early whorls purplish-black or brown- tinted ; the 

 peristome dark flesh colored, often with white spots. Varies 

 commonly to chestnut with streaks but no light band, and to 

 light yellow or olive-yellow with chestnut streaks and white 



