14 sowERrv : marine shells of south Africa. 



I know of no species bearing a very close comparison 

 with this. It is of mucli the same texture as M. semisiikala 

 Desh., but liigher and much more nearly ^equilateral ; it is, 

 moreover, equally sulcated at both ends, the sulci, except- 

 ing near the umbones, crossing the valves. 

 Donax burnupi Sowb., n. sp. 



Testa dongata, atigiisfa, leviter flexuosa, pallide fidva, obscure 

 ftisco tadiata, polita : area posiica sulcata, sulci's iiuiiierosis 

 profundis oblique sub-verticalis. Margo dorsalis anticus 

 longus, rectiusculus, leviter declivis, posticus brevis, rotundatus. 

 Cardo norinalis. Fagina interna albida, ntrinque violaceo 

 tincta. 



Antero-post. 26, umbono-inarg. 12 millim. 



Hab. Natal (Burnufy. 



At first sight this shell resembles the European D. 



politus, but it is distinguished by the remarkable posterior 



sulci. 

 Cytherea (Caryatis) manillae Sowb., 'Thes. Conch.,' vol. 



ii., ]!. 634, pi. 136, figs. 180-181. Natal (a single valve). 

 Cytherea (Meretrix) zonaria Lamarck. — Sowb, 'Thes. 



Conch.,' vol. ii., p. 620, pi. 129, figs. 53-54. Natal. 

 Circe (Crista) divaricata Chem. — Sowb., 'Thes. Conch.,' 



vol. ii., p. 250, pi. 137, figs. S-9. Natal. 

 Meroe contempta Smith, ' Proc. Zool. Soc' Natal. 

 Cardium tenuicostatum Lamarck.— Reeve, 'Conch. Icon.,' 



Cardiuii:, pi. 10, fig. 50. Natal. 

 Cardium rugosum Lamarck. — Reeve, 'Conch. Icon.,' Car- 



diuiiiy pi. 14, fig. 68. Natal. 

 Cardium rubicundum Reeve, 'Conch. Icon.,' Cardium, 



pi. 9, fig. 44. Natal. 

 Cardium papyraceum Chemnitz, — Reeve, 'Conch. Icon.,' 



Cardium, pi. 2, fig. 9. Natal. A specimen in excellent 



condition, with epidermis in raised ridges on the ribs. 

 Cardium turtoni Sowb., n. sp. 



Testa sub-oblique orbiculata, (equivalvis, inceqnilateralis, solidi- 



uscula, parum iuflata, albida, maculis fuscis diversiformibus 



J.C., vol. \ii.. .April 1894. 



