64 MARINE SHELLS OF SOUTH AFRICA. 



MYTILUS FERXA, Linn., Reeve, Conch. Icon. (Mytilus), 

 pi. G, tig. 23. Port Elizabeth, &c. 



MYTILUS EDULIS, Linn., var. M. meridionalis* Krauss, 

 Sudafr. Moll, p. 21, pi. 11. fig. 7. Port Elizabeth, &c. 



MYTILUS AFER, Gmelin, Eeeve, Conch. Icon. (Mytilus), 

 pi. 2, fig. 3. Characterised by more or less pronounced brown 

 zigzag markings ; it is, however, extremely doubtful whether 

 this is rightly considered a species distinct from M. perna. 



MYTILUS VARIABILIS, Krauss, Sudafr. Moll. p. 25, pi. 2, 

 fig. 3. Table Bay, Natal and Port Elizabeth. 



MYTILUS MAGELLAXICUS, Chemnitz, Reeve, Conch. Icon, 

 sp. 22. A young specimen of this spe-cies found on the 

 shore at Natal. 



MODIOLA CAPENSIS. Krauss, Sudafr. Moll. p. 20, pi. 2, 

 fig. 3. Knysna River (Krauss). 



MODIOLA AURICULATA, Krauss, Sudafr. Moll, pi. 2. fig. 4. 

 Natal (Krauss), Port Elizabeth (Bairstow), I. Anjouan 

 (Philippi), Red Sea (Riippell). 



MODIOLA CYLINDRICA, Krauss, Sudafr'. Moll. p. 21, pi. 2, 

 fig. 2. Natal (Krauss). 



MODIOLA MUCRONATA, Philippi, Abbild. und Beschr. 

 neuer Conchyl., vol. ii. p. 150, pi. 1, fig. 8. Natal coast 

 (Krauss). 



MODIOLA LIGXEA, Reeve, Conch. Icon. (Modiola), pi. 10, 

 fig. 58. Port Elizabeth. An Australian species. 



MODIOLA ELEGANS, Philippi, Reeve, Conch. Icon. sp. 19. 

 -Port Elizabeth. Much larger than the typical Indo- 

 Pacific form. 



MODIOLA PETAGN^, Scacchi, Reeve, Conch. Icon. 

 (Modiola). pi. 8. fig. 46. Port Elizabeth. A Mediterranean 

 species. 



MODIOLARIA CUNEATA, Gould, is M. marmorata. 



MODIOLARIA DISCORS, Linn., Sowb., 111. Index of British 

 Shells, pi. 7, fig. 13. Port Elizabeth. A common British 

 and European species. 



