430 TROCHINiE. 



Sub-gen. anadema, H. and A. Adams. 



Shell conoidal, depressed ; whorls with transverse I'ows of 

 granules ; umbilicus with a spiral callus, which gradually be- 

 comes broader, and blends with the outer lip; columella thin, 

 simple; outer lip smooth internally. 



caelata, A. Adams. 



Genus MONILEA, Swainson. 



Shell orbicular, depressed, whorls transversely grooved, 

 axis widely perforated, umbilicus surrounded by a striated 

 callus, last whorl rounded at the periphery ; columella 

 ending anteriorly in one or two tubercles. 



Si/n. Talopia, Gray. 



E.r. M. calyculus. Wood, pi. 49, fig. 3. Operculum, 

 M. calyculus, fig. 3, a, 3, /;, 



In this genus the umbilicus is furnished with a thick, 

 spiral callus, dilated anteriorly where it joins the exca- 

 vated columella, and with another striated, spiral callus 

 more external, which ends anteriorly in a pointed tooth. 

 In the sub-genus Solariella the internal callus is absent, 

 and there is no external, striated callus. 



Species of Monilea. 



Benzi, Krauss. Menkei, A. Admi)s. 



callifera, Lam. nucleus, P/t<7. 



calyculus, Wood. Philippii, A. Adams. 



corrugata, Koch. pusilla, A. Adams. 



crenulata, Mkc. rigata, Phil. 



kalisoma, A. Adams. Swainsonii, A. Adams. 

 lirata, A. Adams. 



