Nc'cc Species of Amastra 



Section Metamastra. 

 ( Re ti ail a ta Series . ) 



21 



var. 



A. sericea var. anaglypta, n 



PI. C. Fig. 9. 



The shell is imperforate, dextral, globosely -conic, solid, 

 roughly sculptured with close narrow grow'th-wrinkles, above the 

 periphery the striae are interrupted at close interv^als by numerous 

 fine revolving furrows, color bay, with a broad lighter colored 

 indistinct band just below the sutures of the last and penultimate 

 whorls and beginning at the periphery shading into an isabella 

 color near the columella. Spire with convex outlines ; the whorls 

 convex, separated by rather deep sutures. The embryonic whorls 

 very finely and closely striate and without spiral furrows. The 

 last whorl rotund, convex, tapering gradually towards the base, 

 smoother and without spiral furrow\s below the periphery. Aper- 

 ture narrow, wMth a strongly convex outer margin furnished with 

 a thin lip-rib, and with a very deep narrow sinus below the colu- 

 mellar fold. Columellar short, twisted, terminating abruptly. 

 Columellar fold rather strong, oblique, situated at the base of the 

 columella and terminatiug abruptly at the outer margin of the 

 columella. 



Length 14.5, diam. 9.2, apert. 7.3 mm.; 6^ whls. (Holotype) 



" I7-0, " 9-5. " 8.1 " ey^ " 



Oahu : Punaluu on the trail to Kaliuwaa just below the sum- 

 mit of the ridge (Spalding, Thaanum, Cook). 



Holotype No. 41,985, cotype No. 41,986, paratypes No. 1921 1, 

 Bishop Museum. 



This form is provisionally located as a variety of A . sericea. 

 There can be no doubt that it is quite closely related to Pfeiffer's 

 species. Its chief difference is that there are more whorls in the 

 variety. An immature specimen with just six whorls measures 

 nearly 14 mm. in length. This variet\', with ./. sericea, is closely 

 related to A . badia and A . Jinda/a. The character of the surface 

 sculpture of the post embryonic whorls is nearly the same in all 

 four forms. The embryonic whorls of anairlypta are more finely 

 striate than those of -/. iDidala or A. badia. Anai^lypta is easily 

 separated from these two species by its smaller size, more convex 

 whorls aufi entire absence of an undulating color-pattern. 



[ 2.39J 



