Fossils from the Miura Peninsula ami its [mmediate North. 4;-} 



The shell is fusiform and rather solid. The whorls may have 

 been about nine in number, but those which arc preserved are 

 only five. They are sharply keeled, with the keel much nearer to 

 the lower suture than to the upper; the surface above the keel is 

 sloping and very slightly convex, below it somewhat receding and 

 nearly perpendicular. The sculpture consists of spiral impressed 

 lines which make the interspaces look like threads which are 

 generally subequal and flatly convex, especially above the keel. 

 The number of these threads varies, but commonly a little over 

 ten above the keel and three below it, except on the body-whorl 

 in which there are many infra-carinal threads down to the very 

 end of the canal. Inner lip smooth.. Sinus somewhat below 

 the suture and just above the keel, shallow and broad. Canal 

 moderate, recurved. Height about 17 (?) millim. Diameter 6,5 

 millim. 



This species shows a great resemblance to Surcula clara Mart. 

 (Tryox, Man. Conch.. VI, pi. 6, fig. 77) of Patagonia in the form 

 of the whorls, but the canal in the latter is much longer and 

 straighter. 



Fossil occurrence. — Kanazawa Zone (Nojima). 



27. Pleurotoma (Bela P) glabra, Yokoyama. 

 Pl. II. Fig. 1. 



A single specimen. It is small, thin-shelled, short-fusiform, 

 with about six convex, perfectly smooth whorls. The body-whorl 

 is longer than the spire. The inner lip is smooth without any 

 callus. The outer lip is thin and broken. The canal is recurved 

 and broken at the anterior end, but it seems not to have been 

 long. The sinus as judged by growth-lines is near the suture, 

 shallow with the lip-margin below it broadly arched. The 

 diameter is 4 millim. The height, if perfect, would be about 10 

 millim. 



Fossil occurrence. — Koshiba Zone (Koshiba). 



