GASTEROPODA. 97 



varices. The base is short and rounded; imperforate. Spire 

 composed of five or six whorls separated by rather broad and deep 

 sutures. 



The body-whorl is convex and rounded with spiral ornament 

 belonging to the usual two sets — (a) the spire-system, consisting 

 of three rows of tubercles which are more or less connected so 

 as to form tuberculated ridges ; and (b) the anterior or basal 

 set of seven or eight spiral ridges which are faintly tuberculated. 

 The whole shell is covered with delicate cross striae. 



Mouth subquadrate. 



The varices are simple, convex and very prominent; four are 

 seen at irregular periods upon our type specimen. 



Measurements. Length, 16 mm.; breadth, 12 mm.; apicial 

 angle 55°. 



Locality. Upware (rare). 



TuRSO Reedi, n. sp. 

 (Plate III., fig. 13, a, b.) 



A small, stout, turbinate shell; round whorled, but strongly 

 keeled; striated and reticulated. Sutures deep, whorls five or 

 six, convex, with two (or three) strong keels upon the anterior 

 part ; posterior half of each whorl concave. 



Body-whorl with numerous (about fifteen) spiral ribs upon its 

 sides and base. 



Base convex, with a small umbilicus. 



The whole surface is ornamented with a delicate spiral striation 

 and oblique cross striations producing a beautiful decussated or 

 granulated appearance. 



Measurements. Height, 13 mm. ; breadth, 11 mm. ; apicial 

 angle, 70^ 



The shells vary in depth of suture and in the number of spiral 

 ribs exposed over the spire. 



Locality. Upware. 



Patella, sp. 



(Plate in., fig. 14.) 



Too imperfect for identification or description. Internal view 

 only known. See figure. 



K. 7 



