1855.] BAILY SOUTH AFRICAN FOSSILS. 459 



this collection, appears to be identical with the peculiarly formed 

 shell described by D'Orbigny under the above name from the Craie 

 Chloritee of France. 



Genus Scalaria, Lamarck. 



SCALARIA ORNATA, UOV. Sp. PI. XII. fig. 2. 



S. testa turrita, imperforate ; anfractibus 9, longitudinaliter costatis 

 (costis in ultimo anfractu 1 6) ; interstitiis striatis ; ultimo anfractu 

 antice carinato ; apertura suborbiculari. 



Length, 2 inches. 



Breadth of last whorl, ^ths of an inch. 



Shell conical, not umbilicated ; whorls about 9, which are crossed 

 by 1 6 equal elevated continuous ribs ; the whorls are closely striated 

 transversely, and decussated with very fine lines of growth, forming 

 a terminal edge upon each rib ; aperture suborbicular. 



This beautiful species is closely allied to Scalaria Bupinianay 

 D'Orbigny, but has a greater number of ribs, and is more finely 

 striated transversely. 



Locality. — CHffs of the coast near the Umtafuna and Umzambani 

 Rivers, S. Africa. 



Genus Chemnitzia, D'Orbigny. 



Chemnitzia Sutherlandii, nov. sp. PI. XII. fig. 5. 



C. testa turrita ; anfractibus 10, convexis, longitudinaliter plicatis ; 

 plicis flexuosis ; apertura elongata, ovata. 



Length, 3 inches -j^ths. 



Breadth of last whorl, 1 inch yo^h. 



Shell turreted, elongated; whorls 10, convex, with longitudinal 

 incurved plications ; aperture elongated and ovate. 



Named after Dr. P. C. Sutherland, late Surgeon to the Arctic 

 Expedition, and now in Natal, to whose valuable researches science 

 is greatly indebted. 



Locality. — Cliffs of the S. African coast near the Umtafuna and 

 Umzambani Rivers. 



Genus Voluta, Linnaeus. 



VOLUTA rigida, uov. sp. PI. XII. fig. 4. 



V. testa oblonga ; spira conica ; anfractibus superne angulatis, longi- 

 tudinaliter costatis ; costis in angulis turgidis, et prope suturam 

 subobsoletis, spiraliter sulcatis ; apertura angulata, elongata. 



Length of broken specimen, 1 inch j^ths ; probable entire 



length, 1 inch -j^ths. 

 Breadth ^o^^^ ^^ ^^ inch. 

 Shell somewhat cone-shaped, with about 18 longitudinal ribs; 

 coarsely striated spirally. The summit of the whorls is formed at 

 the suture into a rim with slight continuations of the longitudinal 



VOL. XI. PART I. 2 I 



