1904.J NATURAL SCIENCES OF PHILADELPHIA. 11 



purple-brown lines below the suture. Sculpture of longitudinal 

 rounded ribs parted by wider concave intervals, and 10 or 11 in num- 

 ber on the last whorl. The last rib is much larger and forms the 

 lip-varix. About 30 spiral threads, on the last whorl, cross the ribs 

 and intervals, sometimes with minor threads between them. The 

 spaces between these threads are evenly granulose by the decussation 

 of growth-lines and spiral striae, there being about four spiral scries 

 of granules in each interval. Whorls 7J 7 the first 2J smooth and 

 rounded, the rest subangular in the middle, the last whorl shouldered 

 above, the shoulder rounded. Aperture narrow. Outer lip nearly 

 straight, with about 8 white teeth within; columella white, with four 

 or five small entering folds, increased to 8 or 10 at the margin, and 

 with several on the parietal wall. 



Length 8, diam. 3.6 mm. 



Length 7, diam. 3 mm. 



Hirado, Hizen. Types No. 85,975, A. N. S. P., from No. 1,516 of 

 Mr. Hirase's collection. 



This species differs from M. decussata and delacouriana in its minute 

 sculpture of regular, squarish granules. 



Clathurella chichijimana n. sp. PI. I, figs. 7, la, 76. 



Shell small, solid, fusiform, gray-white with five black-brown and 

 the same number of white longitudinal stripes on the ribs, sometimes 

 continuous, sometimes dislocated. Sculpture of 10 strong longitudi- 

 nal ribs crossed by spiral threads which swell into tubercles on the 

 ribs, and are 9 or 10 in number on the last whorl. Whorls 7, the first 

 2^ yellow, rounded, forming a trochiform protoconch, sculptured with 

 vertical riblets decussated by delicate, obliquely forward-descending 

 striae. The junction of the protoconch and the sculptured shell is 

 very oblique and sharply defined. 



Aperture narrow, with a deep sinus above. Outer lip with four 

 small teeth within. 



Length 4, diam. 1.7 mm. 



Chichijima, Ogasawara, Types No. 86,127, A. N. S. P., from No. 

 1,439 of Mr. Hirase's collection. 



This species of the group of C. tincta is closely related to C. maculosa 

 Pse., but differs in having the spirals conspicuously swollen where they 

 cross the ribs. C. dichroma Sturany is very similar, but whether it 

 agrees in minor details cannot be known from the brief description. 



Clathurella centrosa n. sp. PI. I, figs. 6, 6a. 



Shell small, fusiform, solid, white with a series of brown spots below 

 the suture on alternate ribs, and a brown band on the base. Sculpture 



