50 AMASTRA. 



fig. 6, was enlarged. A figure of the specimen in his collec- 

 tion is given on pi. 1, fig. 17. It measures, length 9.9, 

 diam. 7.1 mm., with 5 whorls. 



A. melanosis kauensis P. & C., n. subsp. PL 1, fig. 18. 



The shell has the short, wide contour of Newcomb's type 

 figure of melanosis. The cuticle is dull brown with darker 

 streaks, and is in large part deciduous in adult shells, expos- 

 ing the dull, flesh-tinted, somewhat chalky substance of the 

 shell. The embryo is acutely angular, the angle continuing 

 to the middle or rarely to the end of the last whorl. It is con- 

 cealed on the spire except in the last half or third of a whorl, 

 where it is exposed by the slight descent of the last whorl. 

 The umbilicus is open and half covered in some, wholly closed 

 in other examples. 



Length 11.8, diam. 8.25 mm. ; 5y 2 whorls. 



Length 11.2, diam. 7.6 mm. 



"Waiohinu, Kau, near the southern end of Hawaii, Mr. 

 Thaanum. Cotyes no. 108147 A. N. S. and in Bishop Mus.; 

 it is also in the Thaanum collection. 



This form is larger than the type of melanosis, but shorter 

 and broader than what we take to be the adult form of that 

 species. 



A. FLAVESCENS (Newcomb). 



Vol. XXI, p. 315. In its various varieties, this species 

 probably has colonies in every forest district of Hawaii. In 

 specimens from Newcomb, figured in Vol. XXI, the last whorl 

 is rounded. A series from Gulick, without exact locality, has 

 it more or less angular in front. Two specimens from New- 

 comb measure : 



Length 16.5, diam. 9, aperture 7.5 mm. ; 6y 5 whorls. 



Length 15.3, diam. 8, aperture 7 mm. ; 6 whorls. 



In A. /. saxicola Bald, the whorls are more convex, the last 

 one rounded peripherally. This is the race from far south, 

 the type from an aa flow on the Kahuku ranch, Kau. 



A form from South Kona, which Mr. Baldwin erroneously 

 sent as A. henshawi (Vol. XXI, p. 318, last paragraph, and 

 pi. 47, fig. 15), is similar to flavescens except that it is more 



