TURBO. 211 



The synonyms are T. fluctuatus Reeve, T. moUManus Reeve, T. 

 fokkesi Jonas, T. assimilis (fig. 55) T. fessenafu-s, (fig. 54) and in 

 ])art T, saxosus, of Kiener. 



Operculum (pi. 59, fig. 29) rounded oval, witli four whorls and 

 subcentral nucleus ; outside convex, central portion elevated, white, 

 sharply granulate, bounded by a wide groove which connects with 

 a deep central pit by a lunate channel; outside of this is a zone 

 bearing about six narrow concentric beaded green lirulse, which are 

 not continuous over the side of increment. 



Sometimes most of the sculpture is subobsolete; whorls rounded. 

 The largest specimen I have seen measures alt. 80, diam. 75 mill. 



Yar. DEPRESsus Carp. PI, 43, fig. 48. 



Shell much more depressed than the type. 



California. 



Carpenter cites Reeve's pi. viii, fig. 34 as representing his variety; 

 but that figure is of the common form. Reeve's fig. 3c on pi. ix, is 

 probably what Carpenter intended. 



T. SAXOSUS Wood. PI. 48, figs. 31, 82; PI. 50, fig. 56; PI. 57, fig. 

 50. 



Shell ovate-conic, imperforate, brown, olive or gray, above radi- 

 ately marked, below irregularly maculated with snowy white, some- 

 times dark, unicolored; spire conic, acute; suture canaliculate; 

 whorls 5-6, lamellosely densely striate and spirally irregularly 

 lirate, carinated, usually more or less nodose at shoulder, and 

 bearing a subsutural series of stout erect tubercles; aperture half 

 the length of shell, rounded, white and iridescent within ; columella 

 arched, callous, concave, with a deep semilunar longitudinal groove, 

 slightly produced at base. Alt. 35-50, diam. 30-45 mill. 



W- Coast Central America to Galapagos. 



T. nitzschii Anton ("mitzchii Anton" Sby.), and T. venustus Phil. 

 are synonyms. 



Opprculum (pi. 59, figs. 30, 31) rounded oval, flat and dark 

 chestnut inside, with four or five whorls and subcentral nucleus : 

 outside convex, white, middle portion coarsely granulose, with a 

 deep narrow central pit, bounded by a deep concentric farrow not 

 continuous over the margin of increment, outside of Avhich are three 

 narrow minutely beaded concenti'ic ridges, margin of increment 

 granulose. 



