44 Ammonoidea from Pondoland 



inner whorls, and each corresponding with four longitudinally elongated 

 tubercles at the ventro-lateral angle of the ribs. 



The dimensions of the figured example are: 63- , 46- , 32?- , 21 : 

 those of a second smaller specimen : 36--46-"34--22. Crick's holo- 

 type (B.M. No. C19430) has: 71-5--48--30--24 ; and a cotype 

 (C19431): 60--45--28--25. The specimen here figured is slightly 

 crushed. 



The suture-line agrees with that of P. umbulazi, and there are 

 some transitional forms between the two species. 



The Campanian " Schlon7ibachia " flieki, Pervinquiere, 1 may represent 

 an allied form of Pseudoschloenbachia, but the suture-line, apparently, 

 is rather different. 



The smaller example is of interest since its slightly notched keel 

 suggests that the form here described as Gen. nov. ( Muniericeras? ') 

 ci-icki, nov. is the direct ancestor of Pseudoschlcenbachia. 



INCERT^E SEDIS. 



6. — Gen. nov. (Muniericeras?) cricki, sp. nov. PI. VII, figs. 4a, b. 



This species is based on an example of dimensions : 38- , 45- , 40-'24. 

 There are eight prominent, umbilical, tubercles, each connected by 

 slightly sigmoidal (discontinuous) ribs with two outer tubercles on the 

 ventro-lateral edges. The roof-shaped periphery has a row of median 

 tubercles, placed in front of the corresponding pair of ventro-lateral 

 tubercles with which they are connected by obscure ribs that form 

 chevrons on the venter (see fig. 4b, pi. VII). 



There is close resemblance of this form with the Barroisiceras from 

 Madagascar, figured by Boule, Lemoine & Thevenin. 2 The high 

 tubercles, however, situated on the umbilical edge, even of the inner 

 whorls, as in Muniericeras lapparanti, Grossouvre, 3 are different from 

 the ornamentation found in the French examples of Barroisiceras. 



1 "Ann, d. Cret. Alg.", Mem. Soc. Geol. France, Pal. Vol. xvii, No. 42, 

 1910, p. 68, pi. vii. 



2 Pal. Madagascar: " Ceph. Cret. de Diego-Suarez.", Ann. de Pal. Vol. ii, 

 1907, p. 43, pi. xi, fig. 3. (Schloenbachia [Barroisiceras'] habcrfellneri, Hauer sp.). 



3 "Rech. s. 1. Craie super.", II, Mem. Carte Geol. France, 1894, p. 158, pi. 

 xxxv, fig. 3. 



