THE NAUTILUS. 



101 



Bryan ; off Honolulu in 5-8 fms. , and off Waikiki in 30 fath- 

 oms, D. B. Kuhns. 



The shell is white, covered with a thin, straw-yellow cuticle, 

 and stained with russet at the tip, having a very long anterior 

 canal, and a long spire ; longitudinally folded, the folds broad, 

 rounded, about seven on a whorl, crossed by numerous spiral 

 cords, parted by wider, concave intervals, with weak, fine 

 spirals over the cords and intervals. On the earlier post-nuclear 

 whorls there are four large and one small spiral cords. The 

 cuticle has minute, close longitudinal raised threads, which 

 are slightly bristly at intersections of the spirals (the bristles 

 deciduous, and mainly lost in dry shells). The aperture is 

 short, oval, lirate within ; canal long and slender. The whorls 

 are strongly convex. Embryonic shell of two whorls, the first 

 bulbous, obliquely swollen, smooth, 0.7 mm. in diameter; the 

 next whorl narrower, less convex, its last half closely costulate ; 

 the total length of the embryonic shell is 1.1 mm. 



Length 71.5, diam. 19.5 mm. ; 12 whorls. 



Length 105, diam. 29.5 mm. ; 12 post-emb^onic whorls, 

 the apex broken. 



This species resembles F. turricula Kiener, 1 which however has 

 a decidedly deeper suture, and the embryonic whorl is much 

 larger. The type was an immature but perfect shell. The larger 

 ones, from the "dump" of the harbor channel, are without 

 cuticle and apical whorls. In them the folds became shortened 

 on the last whorl, into nodes at the shoulder. It is a handsome 

 and graceful species. 



Peristernia thaanumi n. sp. PI. 9, figs. 6, 7. 



Off Waikiki in 35 to 50 fathoms, D. B. Kuhns, 1916; Hono- 

 lulu Harbor, W. A. and E. L. Bryan. 



The shell is fusiform, thick and solid, pecan-brown, sculpture 

 of strong, rounded, longitudinal folds, 8 on the last whorl, con- 

 tinuous from whorl to whorl. These are crossed by rather coarse 

 spiral cords, of which there are four on the penult, nine or ten 

 on the last whorl; usually a minor cord divides the intervals ; 

 and under the lens numerous spiral and axial threads are seen, 



^conogr. Cog. vii, p. 6, pi. 5, fig. 1. 



