NOTES OX PYRAMIDELLID-E—DALL AND BARTSrll. 325 



a snuill, shinino-, milk-white f^pecics, which might easily be mistaken 

 for a SyrnoJd^ on account of the deep-seated anterior fold. Some of 

 the specimens show faint irreoular im[)ressed axial lines, which we con- 

 sider accidental. A. Adams described a species, Ohe/ij^eit/^ eburneus^'^ 

 which, according to the meager description, appears to difi'er from 

 /*. {T.) piisiUa only in having the whorls here and there longitudinally 

 sulcate. If these sulcations are the same as the irregular impressed 

 axial lines seen in specimens of /*. (T.) pu/^illa, then J\ (71) ehurnea 

 will have to be placed in the synonymy of P. {T.) pusilla. The Berlin 

 material contains two shells, both from Japan, one of which was 

 obtained from H. Adams, the other belongs to the Ptetel collection. 



PYRAMIDELLA (TIBERIA) PUSILLA JACKSONENSIS, new subspecies. 



Plate XXVI, tig. 8. 



There are two specimens of Tiheria in the Pastel collection from 

 Port Jackson, Australia, which agree in general with i^. {T.) im.siUa 

 A. Adams, but are uniformly stouter. We therefore separate them 

 subspecifically under the above name. The type, figured, has eight 

 postnuclear whorls and measures: long. (>.! mm.; diam. 2.7 mm. 



PYRAMIDELLA (TIBERIA) TRIFASCIATA A. Adams. 



Plate XXV, tig. 6. 



Ohpliscnii trifaficialus A. Adams, Proc. Zool. Soc, 1<S62, p. 2.'3!2. 



Shell elongate-conic, acuminate, minutel}'' perforate, vitreous, with 

 three rather broad spiral yellow bands, two of which appear between 

 the sutures and the third on the middle of the base. Nuclear whorls 

 two, small, well rounded, smooth, a little more than half obliquely 

 immersed in the first of the succeeding whorls. Postnuclear whorls 

 slightly rounded, moderately shouldered at the summits, polished, 

 marked only by fine lines of growth and microscopic spiral striations, 

 encircled between the sutures by two yellow bands, each of which is 

 about one-quarter the width of the space between the sutures. The 

 whorls are thus marked by a vitreous zone at the summit, then a 3'el- 

 low one, which is followed by another vitreous band, and finally the 

 second yellow zone, which extends to the suture. Periphery of the 

 last whorl well rounded; base rather long, marked with lines of growth 

 and spiral striations as on the spire; the yellow band on the middle of 

 the base is of the same width as the other two. Aperture rather small, 

 suboval, posterior angle acute, outer lip thin, fortified deeply within 

 by five subequal and subequally spaced interrupted spiral lamelhe; 

 columella straight, strong, reflected, armed with two folds, a strong 

 lamellar plait a little anterior to its insertion and a much Aveaker and 



a Proc. Zool. Soc, 1862, pp. 232-233. 



