AMASTRA, OAHU. 167 



A. microstoma (Gld.). "Shell ovate, irnperf orate, solid, 

 epidermis greenish-brown. Whorls 6, the last ventricose. 

 Aperture small, ovate-rounded, the throat livid ; lip simple, 

 thickened within; columella deeply sinuous, covered with a 

 thick callus, fold strong. Distinguished by its ovate form, 

 dusky green exterior, and small, strongly fortified aperture. 

 Length three-fifths, diam. seven-twentieths of an inch" [15x 

 8.75mm.] (Gld.). 



Compact greenish forms of textilis, which are evidently 

 ' ' microstoma, ' ' occur from Moanaloa to Nuuanu and on Tan- 

 talus. A series from Nuuanu (Cooke coll.) is figured, pi. 30, 

 figs. 8, 9, 10. The spire is darker than the last whorl, mainly 

 purplish-brown; the last whorl is yellowish- green or brown- 

 clouded green, or there may be brownish bands on a yellow- 

 green ground, or yellow bands on a brown ground. 



The integradation between these shells and normal textilis 

 is complete, and we attach little importance to the distinction. 



A. ellipsoidea, of which we have examined Gould's figured 

 type, is no. 5498 U. S. Nat. Mus. (pi. 40, figs. 17, 18). It cer- 

 tainly never came from Maui, as supposed by Gould, being 

 merely a. variegated textilis, exactly like some of the Nuuanu 

 specimens. The ground-color is brown, 'a white band appear- 

 ing below the suture on the penult, whorl, widening on the 

 last whorl, where it spreads downward. There are some 

 narrow whitish spiral lines in the peripheral region, and a 

 rather large yellow basal patch. It may be noted that Gould 

 himself compares it with "ventulus" Fer., a name at that 

 time used for textilis Fer. It has been united erroneously 

 with A. pupoidea Newc., which belongs to a separate series. 

 The type is figured. 



I3a. A. textilis media Hyatt & Pilsbry, n. subsp. PI. 30, figs. 



11, 12. 



The shell is short, rather thin, perforate, compactly ovate- 

 conic, the outlines of the spire slightly convex; sculptured 

 with fine growth-wrinkles; dull purplish-brown under a very 

 thin cuticle which with age becomes light greenish-yellow in 

 lines and streaks, or throughout on the spire, "dead" shells 



