MoUnaca froiic the Bokkeceld Beds. 245 



HOLOPEA BAINI (Sharpe). 



1856. Littorina.i Bainii, Sharpe, Trans. Geol. Soc, ser. 2, vol. vii., 

 p. 213, pi. xxvii., figs. 11, 12. 



Sharpe's description of this species is as follows : " Shell helici- 

 form ; whorls few, rounded, and transversely wrinkled ; aperture 

 angular above, rounded beneath. Largest diameter 1 inch." All 

 the specimens consisted of broken internal casts. 



From an examination of the types it seems that this form 

 belongs to the genus Holopca, or perhaps to the less generally 

 recognised Diapliorostoma . 



Locality. — Gydo Pass. 



DIAPHOROSTOMA ? sp. 



There are three much crushed and somewhat distorted specimens 

 of a small gasteropod (Xos. 161, 162, 163) which seem to belong to 

 the genus Straparollus or Diaphorostoma, the form described as 

 D. danoini, Clarke,'-' from the Devonian of Brazil, apparently 

 bearing much resemblance ; l^ut the state of preservation of our 

 specimens is very imperfect, and even the genus is doubtful. 



Locality.— (Nos. 161, 162, 163) Gamka Poort. 



PTEROPODA. 



TENTACULITES CROTALINUS, Salter. 



1856. Tenfaciditcs crotalinus, Salter, Trans. Geol. Soc, ser. 2, 

 vol. vii., p. 222, pi. xxv., figs. 15-18. 



This species was defined by Salter as follows : " Rather a small 

 species ; three-quarters of an inch in length and about a line thick ; 

 slowly tapering and with nearly direct prominent rings, very variable 

 in distance from one another, but always more than their diameter 

 apart in the older portions. In the younger parts the rings are 

 closer and less prominent, and the apex is frequently bare of them 

 for a variable space. At other times the young tube is closely 

 annulated nearly to the tip, but there is always some irregularity in 



* Clarke, vp. cit., p. 32, pi. iv., tigs. 18, 19. Katzer, oj). cit., p. 201, t. xii., 

 fi'j. 14. 



