PLEUROTOMARIID.E. 71 



P. beyrichi Hilgeudorf. PI. 5Q, figs. 7, 8, 9. 



Shell trochiform, as high as broad, with flat base, moderately 

 numerous spiral lira;, pale yellow, beautifully flamed with red, 

 whorls 11, regularly increasing, on the penultimate whorl with 8 

 line above, 2 in, and 2 under the slit fasciole ; these line are beset 

 with weak nodules, about 3 times as long (in the direction of the 

 spiral) as high or broad. The last whorl has a blunt angle at base ; 

 base with 20 concentric lira;, and in the middle a deep pit or " false 

 umbilicus," outside white, inside pearly ; columellar margin thick, 

 pearly, /S-shaped. Alt. 82, greater diam. 83, lesser 78 mill. 



Japan. 



P. beyrichi Hilg., in Sitzungsb. d. Gesellsch. Naturf. Freunde 

 Berlin, 1877, p. 72. — Martens, Conchol. Mittheil. i, p. 33, t. 7. — 

 Crosse, Journ. de Conchyl. xxx, p. 16, 1882. 



The above description is translated from Von Martens. A single 

 specimen is known. It was discovered by Dr. Hilgendorf in an 

 ancient Japanese collection. 



Section Entemnotrochus Fischer. 



P. rumphii Schepman. PL 57, figs. 13, 14. 



Shell broadly conoid, the base convex, moderately umbilicated, 

 the umbilicus penetrating to the apex, a little plicated within by the 

 prominent growth-lines ; color yellowish-white, with flames of orange 

 or carmine red, and light violet, particularly developed on the last 

 whorl ; apex eroded and yellow ; number of whorls uncertain, prob- 

 ably between 11 and 13. Whorls visibly convex, divided into 

 nearly equal portions by the slit fasciole, which is a little above the 

 middle. The sculpture is composed of oblique, radiating stria;, more 

 prominent on the upper whorls ; base almost smooth, with slight 

 stria; of growth and very fine concentric lines. The aperture is 

 obliquely quadrangular, nacreous; basal margin continuous with 

 the columella, not angulated at its junction with it. 



Alt, 170, diam. 190 mill. ; length of slit, 230 mill., width 2} mill. 



Moluccas. 



P. rumphii Schepman, Tydschr. d. Ned. Dierk. Vereen, iv, p. 163, 

 1879. — Crosse, Journal de Conchyl. xxx, p. 8, 1882. — Sowerby, 

 Thes. Conch, v, p. 185, t. 490, f. 1, 2. 



The only specimen known of this largest species of Pleurotomaria 

 is in the Zoological Garden of Rotterdam. 



