AKT. 18 SMALL SHELLS DEEDGED BY ' ' ALBATROSS ' ' BALL 87 



This resembles S. monocingulata Segiienza, but is larger, and the 

 sculpture of the base is different. 



SEGUENZIA RIISHI, new species 



Shell small, depressed trochoid, with about five whorls; the early 

 whorls have one, the later ones two, the last whorl three spiral keels 

 on the anterior one of which the suture is laid; the base is moder- 

 ately convex, with a deep funicular umbilicus; it is closely finely 

 spirally threaded, the threads a little coarser near the umbilical mar- 

 gin; in the interspaces between the keels on the spire are very minute 

 close spiral striae; aperture with a very shallow sulcus; the outer lip 

 thin, modified by the sculpture; pillar short, twisted, its termination 

 forming a prominent rounded projection hardly to be called a tooth. 

 Height of shell, 2; diameter, 2.6 mm. U. S. Nat. Mus. Cat. No. 

 108085. 



Off Fernandina and Georgia, 20 specimens. 



This is somewhat like 8. carinata Watson, but wants the carina and 

 is smaller, perhaps the smallest species j'ct noted. 



Family ALABINIDAE ? 



Genus ALABINA Dall 



Finella A. Adams (err. typ. pro Fenella), Ann. Mag. Nat. Hist., ser. 3, vol. 



6, p. 332, 1866; type Fenella pupoides A. Adams. 

 Fenella A. Adams, Ann. Mag. Nat. Hist., ser. 3, vol. 13, p. 40, Jan. 1864. — 



Crosse, Journ. de Conchy!., vol. 16, 1868, p. 46. — A. Adams, Ann. 



Mag. Nat. Hist., ser. 4, vol. 6, p. 122, Aug. 1870. Not Fenella West- 

 wood, Syn. Gen. Brit. Insects, p. 54, 1840. 

 Elachista Dall and Bartsch, Nautilus, vol. 15, No. 5, p. 58, Sept. 1901. — 



Dall, Moll. Porto Rico, p. 427, Nov. 1901. l>i ot Elachista Treitschke, 



1833. 

 Alabina Dall, Nautilus, vol. 15, No. 11, Mar. 1902, p. 127. Type BitUum 



cerithidioide Dall. 

 ? Obtortio Hedley, Mem. Austr. Mus., vol. 3, pt. 7, p. 412, Mar. 1899. 



Type Rissoa pyrrhacme Melvill and Standen. 

 Styliferina Carpenter, 1864, not A. Adams, 1860. 



An examination of specimens of Fenella pupoides received from 

 Arthur Adams shows that the nuclear shell begins with two smooth 

 translucent whorls followed by a single larger more inflated whorl 

 and then spiral sculpture well defined, with no axial sculpture. The 

 other Japanese species agree in this character of nucleus and so does 

 the American type of Alabina. The nucleus of Obtortio pyrrhacme 

 however, as described and figured by Hedley, has strong axial riblets 

 and obviously belongs to a different group, and is not identical with 

 the original Fenella. 



