52 TROCHUS. 



number; finally the edge of the columella shows reflexed blunt 

 denticles, or rather, folds. The color is pale brown, decked with 

 darker dots, or blackish. Alt. 6, diam. 9 mill. (Philippi.) 



W. Coast Australia. 



Monodontamaxillata^lE,~$KV, Spec. Moll. Nov. Holl., p. 14. Trochus 

 maxillatus PHILIPPI, Conchyl. Cab., p. 236 t. 36, f. 2. 



T. PHILIPPII Koch. PI. 42, figs. 9-11. 



Shell conical, perforate, fuscescent, marbled with purple or white, 

 whorls plane, ornamented with a series of nodules at the suture, 

 then 3 or 4 series of granules, the last angulated ; base plane, 

 sculpture with 7 rows of granules ; aperture rhomboidal ; lip lirate 

 within ; columella oblique, subsolute above, terminating below in an 

 acute tooth. (Philippi.) 



The shell is conical, perforate ; the whorls are flat, but appear 

 terraced because a nodose carina projects on the upper part, below 

 the sutures; below this there are 2 or 3 minutely granose spiral 

 line, and one more strongly granose, forming the angle of the last 

 whorl. The base is flat, and has 7 granose concentric lir^e. The 

 angle surrounding the very narrow umbilicus is indistinctly grained. 

 The aperture is rhombic, the fauces sulcate, the columella very 

 oblique, somewhat solute above, terminating in an acute tooth below. 

 The color seems to be quite variable; some examples are brown, 

 with large white spots and dark purplish-red granules, others are 

 reddish-brown, with white and purple granules, etc. 



Alt. 11, diam. 12? mill., or smaller. Perhaps this species is 

 identical with Monodonta granulata Gray, (Capt. King's Survey, 

 etc., appendix, p. 47.) (Philippi.) 



Adelaide, Australia. 



T. pfiilippii KOCH, in PHILIPPI, Abbild. u. JBeschreib., i. Trochus, 

 t. 2, f. 1. Conchyl. Cab., p. 238, t. 36, f. 4. 



T. OMALOMPHALUS A. Adams. PL 15, fig. 52. 



Shell low conical, acutely carinated at periphery, deeply umbilicate, 

 grayish or brownish, with subsutural and peripheral brown blotches, 

 the carina white and brown articulated, sometimes visible at the 

 sutures, base radiately painted or finely tessellated ; spire somewhat 

 slender toward the acute apex ; whorls rounded, the last descending 

 a little below the peripheral carina anteriorly, bearing above, 8 to 10 

 closely finely granulose spiral cinguli, separated by regularly, ob- 

 liquely and sharply striate interspaces; base concentrically finely 



