464 IS.VXDA-GAMITIA. 



A compact, depressed little shell, with diamond-shaped aperture, 

 showing in fresh specimens a slight trace of pearl within. Adams 

 describes the color as spotted with brown in transverse series, with 

 transverse whitish lines, and a wide subsutural white band. The 

 coloration is very inconstant, as the figures on pi. 59 (copied from 

 Smith) show. The columella is straight, a trifle expanded above, 

 connected with the upper lip by a thin parietal callus. 



Var. LKPIDA A. Ad. Turbinate-conic, whitish-ashen, last whorl 

 slightly angulated at periphery. 



I. SULCIFERA A. Adams. 



Shell orbicular-conoid, umbilicate, shining ; spire a little elevated ; 

 whorls 5, subplanulate angular above, and with a deep sulcus there, 

 above at the sutures crenulated and angulated, the last transversely 

 sulcate, encircled by a hair-like carina at the periphery; whitish, 

 ornamented with close longitudinal undulating and angular lines ; 

 umbilicus open, perspective, sulcate within, the margin crenated ; 

 aperture subquad rate ; columella sub-straight, crenulated. (Ad.) 



Philippines. 



I. sidcifera AD., P. Z. S. 1853, p. 190. 



In this species there is a conspicuous deep groove round the upper 

 part of the whorls near the suture. (Ad.) 



[Lander crenelliferus Ad., Ann and Mag. ix, 1862, p. 296, is the 

 type of Microtheca Ad. See MANUAL, vol. X, p. 166.] 



Subgenus UMBONELLA A. Adams. 



Umbonella AD., Ann. Mag. N. H. 1863 (vol. xi, 3d ser.). 

 I. MURREA Reeve. Vol. X, pi. 58, fig. 62. 



This shell was described and figured in the MANUAL, vol. X, p. 

 264. It is a small turbinate, porcelaneous shell, with narrow umbil- 

 icus, its margin crenated. 



Gotto Is., Japan, 71 fms. 



Turbo murreus REEVE, Conch. Icon., sp. 54, 1848. Isander 

 maculosus A. AD., Ann. Mag. N. H. 1862, xi, p. 296. Umbonella 

 murrea Reeve, AD., Ann. Mag. N. H. 1863, xi, p. 265. 



Genus CAMITIA Gray. 



Camitia GRAY, Syn. Moll. Brit. Mus. 1840. H. & A. AD., Genera 

 Rec. Moll, i, p. 409. 



