SMITH : SOUTH AFRICAN MARINE SHELLS, WITH NEW SPBCIfS. I05 



castas pfcccipuas sulcata, sulcis ad niargiiiein profundis et prolongatis, 



ititer sulcos crenulata. Longit. 44 //////., diani. 28, alt. 13. 



Hab., Port Elizabeth (J Crawford). 



This species is quite distinct from Flssiirella sieboldii, differing in 

 colour, form, and sculpture. It is a longer shell and more depressed, 

 and not arched behind the foramen, the central of the posterior costae 

 being depressed and not elevated. The costce also are radiately 

 striated, not acute, but broader, especially the three posterior ones. 

 These are conspicuously prolonged, producing a strongly festooned 

 margin behind. They have a roughish subnodose appearance, caused 

 by strong matks of arrested growth. The intervening costellse are 

 much finer and vary in thickness, sometimes being alternately finer 

 and coarser. They are beautifully scaled by the crossing of the close- 

 set lines of growth which produce a finely cancellated surface. The 

 apical hole is surrounded within by a circumscribed callus, which 

 is truncate, but hardly pitted behind. The interior is white, or may 

 show faintly the dark rays which sometimes occur on the outer sur- 

 face. Young shells exhibit only eight principal costee, the ninth, the 

 posterior central one, not developing until later in life. 



3. Glyphis elevata Dunker. 

 Fissurella elevata Dunker; Philippi's Abbild., vol. ii., p. 67, pi. II., 



fig. 4, 1845; non Pilsbry, Man. Conch., vol. xii., p. 217, pi. 39, 



figs. 8, 82 85, 1890. 



Hab.^ Cape of Good Hope (Dkr.). 



Mr. Pilsbry considers this species, together with F. imbricata 

 Sowerby, F. australis Krauss, and i^ nigriradiata Reeve, as synonyms 

 of F. riippellii Sowerby. This is a most unfortunate lumping, and 

 would not have occurred if he had examined the types. I believe he 

 is right as regard F. nigriradiata, which evidently is only a small or 

 half-grown specimen of ruppellii. On the contrary, both aiistralis, 

 imbricata, and elevata are perfectly distinct from it and one another. 

 The last species, besides a slight difference in form, has a greatly 

 superior number of much finer costae, and a very differendy shaped 

 foramen. Dunker gives the number of riblets at 180,^ but in the shells 

 before me, which I regard as belonging to his species, I find only about 

 100-114, On the contrary, F. riippellii has only 40 to 50. The apical 

 callus within in F. elevata is peculiarly truncate and deeply pitted be- 

 hind, and very different to that of F. riippellii. 



4- Macrochisma producta var. 



Macrochisma producta A. Adams ; Pilsbry, Man. Conch., vol. xii., 

 p. 194, pi. 59, fig. 62, 1890. 



I It seems probable that the 8 and o have been transposed and that the number intended 

 was loS. 



