240 Annals of fJie Soiitli African Museum. 



7-8. One specimen measuring 24 mm. in length has a diameter 

 of 18 mm. at the upper end and 15 mm. at the lower. 



Ulrich's species, OrtJioceras sp. jj/'- from the Devonian of Bolivia, 

 has the septa more distant and the rate of tapering less. 0. tyjnnn, 

 Saemann,! appears to be closely allied. 



Locality. — (Nos. 172, 173,^174, ? 175, 176, ?179, 180, ? 170) 

 Gamka Poort. 



GASTROPODA. 



The following members of this class are represented in this- 

 collection : — 



Pleurotomaria aff. kayseri, Ulrich. 

 Belleroplion cf. viorganianus, Hartt and Eathbun. 

 (Bucaniclla) aff. trilobatus, Sow. 

 ,, ( ,, ) cf. rcissi, Clarke. 



,, (Plectonotus) aff. salteri, Clarke. 



Loxonema sp. 

 Diajjhorostoma ? sp. 

 Tentaculites crofalinus, Salter. 



,, bai)ii sp. nov. 



Conularia africana, Sharpe. 



,, qnichua, Steinmann-Doderlein. 



,, cf. undnlata, Conrad, 



cf. acuta, Eoemer ? 



Salter and Sharpe | described the following species, but only 

 the two marked with an asterisk are included in the present 

 collection : — 



Belleroplion quadrilobatus, Salter. 



Littorina ? [Holopea'] baini, Sharpe. 

 ■''•Tentaculites crotalinus, Salter. 



Theca [Hyolithes] subcequalis, Salter. 

 "■'Conularia africana, Sharpe. 

 sp. 



* Ulrich, op. cit., p. 39, t. ii., tig. 3. 



t Hall, Illustr. Dev. Foss., Geol. Surv. New York, Palseont. (1^76), pi. xxxviii., 

 tigs. 4-10. 



I Salter and Sharpe, Trans. Geol. Soc, ser. 2, vol. vii., 1856, pp. 213-21o,, 

 and 222. 



