122 TROCHOMORPHA. 



flesh-colored within ; peristome simple, the upper lip thin, arched 

 forward, basal lip regularly arcuate, slightly thickened. 



Alt. 6*, greater diam. 24, lesser 20 mill. 



Alt. 7, greater diam. 23, lesser 20 mill. 



Lugar Espana, Island of Sibuyan, Philippines* 



Tr. sibuyanica HID., Journ. de Conchyl. 1887, p. 96, t. 5, f. 3; 

 Obras Malacol. i, p. 20, 111. 



The last whorl seen from above, is wider than usual, and the dis- 

 tance from the outer angle of the aperture to the line of the preced- 

 ing whorl is about equal to the distance from the latter to the inner 

 termination of the columella. The sculpture of the base also is 

 characteristic. 



T. QUADRASI Hidalgo. Vol. IX, pi. 7, figs. 1, 2, 3. 



Shell depressed, very acutely carinated, thin, subtranslucent, horn- 

 colored, shining; very broadly umbilicated, the width of the umbil- 

 icus contained 4? times in the greatest diameter of the shell. 



Surface somewhat iridescent in places; having delicate growth- 

 lines above, more glossy below, and closely spirally striated except 

 just at the mouth of the umbilicus. Spire low-conoid, the inner two 

 whorls convex, the rest nearly flat, slowly increasing, the last whorl 

 at aperture about one-fifth the diameter of the shell. Suture hardly 

 impressed, a white hair-line. Carina white-edged, the whorl concave 

 above and below it. 



Aperture oblique, ax-shaped, the upper lip arched forward, not 

 arcuated, basal lip slightly thickened, white, regularly arcuate, the 

 columellar termination somewhat more distant from the suture than 

 the outer angle of the lip is. 



Alt. 7i, greater diam. 24, lesser 21 f mill. 



Alt. 7, greater diam. 22, lesser 20 mill. 



Cuyapo, Province Nueva Ecija, Luzon, Philippines* 



Trochomorpha quadrasi HID., Obras Malacol. i, p. 117. v. MOELL. 

 Nachrbl. D. M. Ges. 1891, p. 123. TV. stenogyra v. MOELL. Nachr.- 

 bl. D. M. Ges. 1890, p. 202. 



This beautiful species is closely allied to Tr. sibuyanica and Tr* 

 metcalfei. It differs from the former in the wider umbilicus, and 

 comparatively narrower last whorl (seen from above) ; it differs 

 from metcalfei in being larger with comparatively wider umbilicus, 

 narrower last whorl, and in lacking the broad brown bands above 

 and below the keel. 



