294 Annals of the South African Museum. 



that of C. pseucln-eleyaHs and C. mmnifuiense, but the costation is much 

 closer in the present example, and in the specimen described by Crick, 

 than it is in either of the two species mentioned, and the flat, sub- 

 parallel sides and broader periphery separate them especially from 

 C. tna >nt tiense. 



C. virynftnu, Spengler sp.,* and C. striaticostatum, Crick sp.,thave the 

 squarish whorl-shape of the form here described, but their costation 

 is much coarser or more distant than that of any of the Zululand 

 examples of the genus Cymatoceras here dealt with. 



In closeness of costation this species approaches to the Ceuomanian 

 Cymatoceras elegans. J. Sowerby sp.,t though its whorl-shape is more 

 like that of the older C. pseudo-elegans, d'Orbignv sp. 



Locality. Manuan Creek. Coll. Resident Magistrate, Ubombo. 



20. CYMATOCERAS cf. KOSSMATI, Spengler sp. 



ll>10. Nautiliot (Cymatoceras') kossmati, Spengler. " Untersuch. ii. 

 d. Siidind. Kreidef.," IV, loc. c!t., p. 129. 



One specimen (No. 2588), representing a wholly septate cast, has a 

 portion of the shell preserved at the diameter of 80 mm. and shows 

 only striae of growth at that stage, but obscure folds on the ventral 

 area of the cast of the following portion. Its dimensions are : 

 Diameter .120 mm. 



Thickness . 75 ,, (63 per. cent, of the diameter). 

 The specimen is a more compressed example of Cymatoceras than 

 those described above, and resembles in general appearance C. koss- 

 mati, but this species is strongly costate already at a considerably 

 smaller diameter. The siphuncle in the present example is nearer 

 the ventral side and not in the median plane. 



C. kayeanum, Blanford sp., is a still more compressed species, and 

 is more distinctly costate on the ventral area than the specimen here 

 described. 



The Cenomaniau C. imbricatum, Crick sp.,|| also is too compressed. 



Locality. Mauuan Creek. Coll. Resident Magistrate, Ubombo. 



* Loc. cit. (1910), p. 130, pi. xi, fig. 3. 



t Loc. cit. (1907), p. 221, pi. xiv, fig. 7. 



J Non 2fautilns elegans (Sowerby), in Boule, Lemoine and Thevenin, loc. cit. 

 (1907), p. 66, pi. xv, figs. 4 and 5. 



Loc. cit. (1861), p. 41, pi. xviii, fig. 1 (type) ; Spengler, loc. cit. (1910), p. 127 y 

 pi. xi, figs. 1 and 2, pi. xii, figs. 2 and 7 a. 



|| Loc. cit. (1907), p. 220, pi. xiv, fig. 6. 



