292 Annah of the South African Museum. 



area at a late stage, and tip to a diameter of about 90 mm. there are 

 only striae of growth. This is reminiscent of the Barremian N. 

 pseudo-elegans, d'Orbigny, the genotype of Cymatoceras, and the 

 measurements also agree with those given by the author of this 

 species. These dimensions are, in the specimen here described : 

 Diameter . . . 180 mm. 



Thickness . . . 115 ,, (64 per cent, of the diameter) 

 Height of the last whorl 



(in siphonal plane) . 65 ,, 



Another apparently Albian but imperfect specimen of a Cymato- 

 ceras, in the British Museum, No. C18298, not referred to in Crick's 

 paper, shows a similarly late appearance of costatiou. This and 

 another example (No. C18299) of the same imperfect set of Nautili, 

 not mentioned in Ci'ick's Report, ai % e interesting as showing approxi- 

 mation of the last few septa (see Crick, ' Proc. Greol. Soc.,' No. 979, 

 p. 3, November llth, 1915). 



Foord* describes, from the Gault, a " species which, on the whole, 

 agrees very closely with Pictet and Campiche's description and figures 

 of N. albensis, but differs from it in respect that up to a certain 

 [variable] stage of growth the test is smooth. . . ." The present 

 example thus would seem to stand in a similar relation to C. 

 manna n en se. 



One of the imperfect specimens mentioned by Crick, t on p. 245 

 (B.M., No. C 18295) as " probably referable to Erirephoceras" may 

 belong to the same species as the form here described, and at any rate 

 is a Cymatoceras. Another of the examples (C18294) is referable to 

 Cymatoceras Jeayeanum, Blaiiford sp., or a similar compressed species, 

 whereas the remaining two specimens (Nos. C18292 and 93), preserved 

 in limonite, may be of Seuouian age.+ 



Locality. Middle Branch, Manuan Creek. Coll. W. J. Wybergh. 



17. CYMATOCERAS cf. ALBENSE, d'Orbigny sp. 



1859. Nautilus albensis, d'Orbiguy. In Pictet & Campiche, Pal. 



Suisse, 2nd ser., p. 134, pi. xvii, figs. 1 a and l> only. 

 1891. NautUns albensis, Foord. Catal. Foss. Ceph. Brit. Mus., ii r 



p. 258. 



One specimen (No. 4989) differs from the holotype of C. manuanense, 

 Crick sp., and from the examples above described in being slightly 



* Loc. cit. (1891), p. 259. 



t Loc. cit. (1907), Third Keport, pt, ii. 



I See under Ci/mafoceras: 1 sp. cf.jutfum, Blanfoi'd sp., p. 301. 



