8 



white or yellowish, with a more or less distinct dusky band near 

 the suture, and sometimes pale flexuous lines on the larger whorls. 



Length five eighths of an inch ; breadth one eighth of an inch. 



This elegant little shell is distinguished by its small size and 

 slender form, and its simple fluted surface without revolving lines. 

 It has much the for/m and surface of T. nitida, but the size of 

 T. fictilis and nassoides. 



TROCHUS MARCIDUS (PL XIV. Fig. 11.) 



T. pyramidalis, solidula, vix striata, rufo-viridis ; anfract. quinque plaiiulatis 

 ad suturam vix discretis ; basis subplana, lams, umbilico amplo profundo in- 

 fundibuliformi, juxta aperturam partim tecto ; apertura subrhombea, perobli- 

 qua; operculum tenuc. 



Shell of moderate size, strictly pyramidal, the distinction of the 

 whorls being scarcely marked at the sutures; surface with fine 

 incremental stria3, of a dull brownish and green color. Whorls 

 about five, quite flat, the large one sharply angular at periphery. 

 Base very slightly convex, highly polished and silvery near the 

 aperture and around the umbilicus, which is deep, large and broadly 

 infundibuliform, partially covered on the side of the aperture by a 

 thin plate of shell, the margin of the funnel being indicated by an 

 obtuse angle. Operculum very thin, of a dark amber color. 



Axis seven eighths of an inch ; diameter of base one and one 

 eighth of an inch. 



Inhabits Monterey. Lieut. Green. 



In color and general appearance this shell would not at first sight 

 be distinguished from T. Montereyi, Kiener ; but it is a smaller and 

 less elevated pyramid ; and the base differs altogether in its per- 

 fectly plain, broadly tunnel-shaped umbilicus, and its entirely sim- 

 ple lip throughout. 



TROCHUS PICOIDES. 



Among the specimens obtained from Col. Jewett, was one from 

 Santa Barbara, which would at first glance be pronounced to be T. 

 pica. Being unprepared to see this species from the Pacific shores, 

 I was led to make particular inquiry as to the certainty of its having 

 been obtained alive at that place, and being satisfied on that point, 

 I obtained the loan of three of the five specimens brought home. 



