Marshall and Murdoch. — New Fossil Si)ecies of Mollusca. 255 



small marginals at the sutures ; they are widely spaced, much narrower 

 than the interspaces, strengthening on the periphery and forming angular 

 nodules ; on the body-whorl there are ten or eleven spirals similar to the 

 whorl above except that the basal are less nodular, thence more closely 

 spaced, smaller and ap]iroximating the spirals on the canal, of which there 

 are eighteen or more ; in addition there are in the interspaces a few minute 

 spiral lineations. Strong, irregular growth-lines cut the spirals and nodules 

 into minute secondary sculpture. Aperture ovate, narrowed into a long 

 canal ; outer lip sharp, slightly crenulated by the sculpture : inner lip 

 with a narrow callus continuous with the margin of the canal. 



Dimensions (largest fragment): Length, 38mm.; breadth. 24mm.; 

 aperture, greatest length (excluding canal), 18 mm. The smaller example 

 has a length of aperture and canal of 30 mm.; breadth of body-whorl, 

 19 mm. The largest fragment is somewhat compressed and distorted. 



Localitv. Wharekuri. in brown sand. Collector, P. Marshall. 



Type to be presented to the Wanganui Museum. 



The species is perhaps nearest to F.solidus Suter, recorded from South 

 Canterbury and North Otago. 



Ficus imperfectus n. sp. (Plate XXI, fig. 4.) 



The material comprises a single example only, of which a considerable 

 portion of the outer lij) is broken away, also some small part of the 

 columella. The example gives the impression that it is not adult. Shell 

 small, fragile, pyriform, spire slightly elevated, last whorl rounded, the 

 area between the suture and a line with the outer lip very slightly convex, 

 and giving it a slightly shouldered appearance ; canal fairly long, anteriorly 

 somewhat curved and twisted to the left. Whorls about four, those of 

 the spire sloping-convex ; })rotoconch small, slightly rounded ; the first 

 two volutions smooth, thence minute irregular growth-striae, followed bj' 

 delicate but well-marked transverse riblets, which as the whorl progresses 

 assume a slightly backward slope ; fine spiral threadlets make their appear- 

 ance. The shell is slightly rubbed, and it is quite probable that the 

 sculpture may extend to all the whorls. On the last whorl the sculpture is 

 more strongly developed, the longitudinals somewhat irregularly disposed, 

 narrower than the interspaces, slightly fiexuous on the shoulder, and 

 becoming obsolete on the canal ; a secondary sculpture of minute threadlets 

 adorns both riblets and interspaces ; spirals on the area between suture and 

 shoulder minute, on the shoulder and anteriorly strengthening and form- 

 ing small nodules on the axial sculpture, the interspaces wider than the 

 cords and with one or more minute threadlets ; on the canal the spirals 

 smaller and more closely spaced. Sutures narrow and slightly impressed. 

 Columella smooth, slightly curved, and thinly calloused. Aperturi^ im])erfect. 



Length, 10 mm. ; breadth, 5-5 mm. 



Locality, Target Gully. Collector, P. Marshall. 



Type to be presented to the Wanganui Museum. 



The species is perhaps n<>arest to F. parvus Suter, fi-om which it may be 

 distinguished by the axial riblets and the small but well-marked nodules 

 on the last whorl. 



Surcula castlecliffensis n. sp. (Plate XXI, fig. 3.) 



Shell small, fusiform, spire turreted, aperture and canal about equal to 

 half the total length. Whorls seven ; protoconch about one and a half 

 volutions, smooth and with an angular ridge ; succeeding whorls strongly 



