HELIX. 71 



H. JACQUINOTI, Pfr. PL 13, figs. 72-74. 



Somewhat solid, acutely carinated, closely arcuately costate, 

 variegated with white and brown, not shining ; whorls 8, narrow, 

 all carinated, carina exserted, toothed with decurrent ribs, base a 

 little convex, radiately striate ; umbilicus contracted by a lamina, 

 wide within ; aperture with two long parietal, one columellar, and 

 three deep-seated basal lamellae. Diam. 9 mill. 



Tahiti. 



It is H. excavata, Hombr. et Jacq., and possibly H. bursatella, 

 var. B. Gould. 



H. COABCTATA, Pfr. PL 13. figs. 78-80. 



Distantly arcuately costate, slightly and finely spirally striate, 

 brownish, tessellated with chestnut, not shining; whorls 8 J, narrow, 

 carinated, somewhat scalar, the last receding below the penultimate ; 

 base slightly convex, obsoletely radiately costate, more distinctly 

 concevitrically striate ; umbilicus wide, contracted by a lamina 

 above ; aperture with two parietal lamella, one on the columella, 

 one within the outer wall, and two on the margin of the base. 

 Diam. 6*3 mill. 



Ins. Tahiti. 



H. turricula, Hombr. et Jacq. (figs. 79, 80), H. streptaxon, Reeve 

 (fig. 78), and H. bursatella, Gld. (in part), are synonyms. H. 

 cavernula, Hombr. et Jacq., is erroneously referred here by Garrett. 



H. BURSATELLA, Gould. PL 13, fig. 86. 



Solid, rough, carinated, closely arcuately costate above, marbled 

 with white and chestnut color, not shining ; whorls 9, very narrow, 

 base plane, smoothish, angulated and contracted over the umbilicus ; 

 aperture 6-7 plicate, two of them parietal, one Columellar and three 

 or four basal. Diam. 7'6 mill. 



Ins. Tahiti and Eimeo. 



H. turricula, Hombr. et Jacq., has been erroneously referred 

 here ; it is a synonym of the preceding species. 



H. RETUNSA, Pease. PL 13, fig. 81. 



Tessellated with chestnut and white above, radiated with flexu- 

 ous flames below ; w r horls 7, convex, obliquely radiately costulate, 

 the riblets subdistant, flexuous, concentrically striated ; umbilicus 

 cavernous, constricted at the top ; throat with two revolving 

 lamellae, one on the columella, one parietal. Diam. 4 mill. 



Tahiti. 



