Bartsch — New Marine Mollusks from the Philippines. 183 



additional, much stronger and much more closely spaced cords are crowded 

 on the anterior part of the columella. The incised axial lines referred to 

 on the spire continue over the base. Aperture irregularly very elongate 

 oval; outer lip rendered sinuous by the external ribs, reinforced within 

 by a thick callus; inner lip provided with four oblique folds, which decrease 

 regularly in size from the posterior anteriorly, the last one being only 

 feebly indicated; parietal wall covered by a moderately thick callus. 



The type and three specimens of this species, Cat. No. 219,057, U. S. 

 N. M., Collector's No. 122, were collected by Mr. Weber at Brooke's 

 Point, Palawan. The type, which has lost the nucleus, has 6.5 whorls 

 remaining, and measures: length, 14.5 mm., greater diameter, 7.1 mm. 

 One of the four specimens, which has also lost the nucleus and some of the 

 early postnuclear whorls, is considerable larger. It has 6.5 whorls remain- 

 ing and measures: length, 18 mm.; greater diameter, 8.9. mm. 



This species belongs to the group of Mitra chrysallis Reeve and Mitra 

 pregra Reeve. The National Museum collection also contains two speci- 

 mens, Cat. No. 32,030, collected by the author at Cataingan Bay, Masbate. 



Mitra atnanda, new species. 



Shell ovate, spire rather short, surface marked by more or less 

 wavy alternating bands of dark chocolate brown and buff. Nuclear 

 whorls decollated in all our specimens, the succeeding turns forming a 

 not very tall, rather broad spire. Whorls strongly rounded, almost ap- 

 pressed at the summit, the early turns marked by about three incised spiral 

 lines which separate the space between the summit and the suture into 

 three equal areas and from there on, the whorls are divided into four subse- 

 equal spiral zones above the suture. Periphery slightly rounded, base 

 rather long, only very slightly concave, marked by weak, very broad 

 spiral cords which become successively stronger from the periphery an- 

 teriorly, excepting the last four, which again are decidedly weaker; there 

 are nineteen of these cords present. In addition to the above sculpture, 

 the entire surface of the shell is marked by rather strongly wavy incre- 

 mental lines which extend from the summit to the tip of the base. Aperture 

 irregularly elongate oval, decidedly channeled anteriorly, the posterior 

 angle acute; outer lip very much thickened within, somewhat sinuous, 

 rendered wavy by the cords in its anterior half; inner lip reflected over 

 and appressed to the base, pro /ided with four oblique folds which become 

 successively smaller from the posterior, anteriorly. The anterior termina- 

 tion of the inner lip has the appearance of a fifth fold; parietal wall covered 

 by a moderately thick callus. The inside of the outer lip is dark chocolate 

 brown over the anterior three-fourths, while the posterior fourth is blu- 

 ish white within, edged with chocolate. The columellar folds are bluish 

 white. The rest of the inner lip is dark. 



The type and five specimens of this species, Cat. No. 221,815, U. S. 

 N. M., were collected by the author at Dumurug Point, Cataingan Bay, 

 Masbate. The type has lost the extreme tip. The nine whorls remaining 

 measure: length 22.5 mm.; greater diameter, 11.4 mm. 



