SMITH : MARINE SHELLS FROM PORT ALFRED. 39 



Cultellus deeipiens, n.sp. 



Cultellus pel/uridus, Sowerhy (non Pennant) : Marine Shells S. Africa, 

 P- 54- 

 Testa C. iJeJhtcido similis, sed major, latere antico longiore. 



This species is very like the well-known C. pellucidux, Pennant, of the 

 British coast, but attains large dimensions, the largest specimen examined 

 being 53 millim. in length. The position of the beaks is proportionately 

 further back, so that the anterior portion of the shell is rather longer. The 

 strengthening rib within the valves, which is in front of the hinge teeth, is 

 longer, straighter and almost parallel with the dorsal edge. 



Semele eapensis, n.sp. 

 PI. iii, figs 15, 16. 



Testa parva, antice latior, postice acute rotundata, fere aequilateralis, com- 

 pressa, allnda, radiatim tenuissime striata, lineisque increment! distantibus 

 lamelliformil)us ornata; umbones acuti, laeves; sinus pallii profundus, rotiinde 

 acaminatus ; cicatrix antica elongata, postica latior. 



Longit. II millim., alt. 8, diam. 3.5 



This species may attain larger dimensions than those here given. Its 

 .sculpture (Fig. 16) recalls that of certain Tell inae such as T. fp^^elJata, Desh., 

 T. carnicolor, Hanley, etc. 



Theora ovalis, n. sp. 

 PI. iii, fig. 17. 

 Testa parva, tenuissima, ovalis, alba, fere aequilateralis, antice subbrevior, 

 postice vix angustior ; valvae nitidae. incrementi lineis tenuissimis striatae, 

 mediocriter convexae ; um' ones parvi, acuti, leviter prominentes ; dens car- 

 dinalis unicus in utraque valva, et fossa ligamenti margine incrassato pone 

 limitata. 



Longit. 9.5 millim , alt. 7, diam. 3.5. 



There are only the faintest indications of lateral teeth on the hinder 

 margin in each valve, and I canncjt trace any pallial sinus. 



Tellina regularis, n. sp. 



PL iii, fig. 18, 

 Testa parva, inaequilateralis, tennis, subpellucido-albida, vel dilutissimefus- 

 cescens, concentrice tenuissime striata; margo dorsi anticus rectiusculus, 

 leviter descendens, posticus brevior, magis declivis ; latiis anterius acute 

 rotundatiim, posterius subrostratum ; dentes cardinales valvae dextrae duo 

 divergentes ; dens lateralis anticus brevis, prope umbones situs, posticus 

 longior, tenuior ; dentes cardinales valvae sinistrae duo, laterales nulli ; sinus 

 pallii profundissimus. 



Longit. 14 millim., alt. 10, diam. 4-5 



Some specimens are marked with radiating, broken-up, hair-like pellucid 

 lines. 



