62 PARTULINA, MAUI. 



Achatindla terebra NEWC.. P. Z. S., 1853, p. 144, pi. 23, f. 

 40. PFR., Monographia iv, 525; vi, 168. THWING, Reprint, 

 pi. 2, f. 18. A. corusca Gulick and A. perforata Gulick, unde- 

 scribed, PFR., Monogr. iv, 525 (names only). Achatinella 

 attenuata PFR., P. Z. S., 1855, p. 4, pi. 30, f. 12. Achatinella 

 lignaria GULICK, Ann. Lye., p. 209, pi. 7, f. 35, 1856. 



Newcomb's original figure is copied, pi. 15, fig. 2. A speci- 

 men received from Dr. Newcomb, typical in markings though 

 somewhat smaller, is drawn in pi. 15, fig. 1. The last embry- 

 onic whorl has rather wide stripes, the following whorls narrow, 

 more or less angulated in places, and of a tawny color on a 

 white ground. The surface is glossy and the spiral and decur- 

 rent striation weak. Length 18, diam. 9.5 mm., of fully 6 

 whorls. 



Besides this typical form, Newcomb sent out lignaria, corusca 

 and longior as terebra. It will probably be possible for a natur- 

 alist in the field to arrive at some trustworthy conclusion as to 

 the rank or value of the several named forms of this group. 

 Without such knowledge, I must be satisfied to give the data 

 relative to the various forms. 



In a series from Waiehu (pi. 15, figs. 4 to 8) from Baldwin 

 the shell is stouter than Pfeiffer's figure of attenuata, and the 

 stripes are less flexuous. Surface glossy. They vary from pure 

 white, through faintly striped to copiously striped forms, the 

 latter usually having the ground of a pale brown tint. The 

 shape also varies. Length 16 to 18 mm. The white examples 

 are not distinguishable from the following variety. 



Var. corusca Gulick. PL 15, fig. 9. . Gulick referred speci- 

 mens from Wailuku (which intergrade with lignaria) and from 

 Waihee, to attenuata. His undescribed A. corusca, according to 

 unlocalized specimens before me, agree well with the Waihee lot, 

 and were probably from that place. The name was afterwards 

 abandoned by Gulick, who adopted attenuata in its place. The 

 shells are white, rather glossy, often with some faint bluish 

 stripes on the last embryonic whorl. The sutural margination 

 is conspicuous. Spiral sculpture visible throughout but rather 

 weak. Length 16.3, diam. 8.5 mm. to length 18, diam. 9 min. 



The Wailuku lot consists partly of shells like those from 



