. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. Notes on South African Mollusca. 109 lip thin, simple, inner furnished with three white dental processes— (i) a prominent, linguiform tooth parallel to, and about 1-7 mm. from the outer lip ; (ii) a short, rather conical tooth about half-way between the upper one and the base; (iii) a minute columellar fold rather nearer the second tooth than the base. Long. 10-4 ; lat. 5'5 ; apert. 6'7x4'7 ; last whorl 9'G x-2 MAKINULA TRISTANENSIS, sp. nov. Epidermis purple-black ; lines of growth eroded white.
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. Notes on South African Mollusca. 109 lip thin, simple, inner furnished with three white dental processes— (i) a prominent, linguiform tooth parallel to, and about 1-7 mm. from the outer lip ; (ii) a short, rather conical tooth about half-way between the upper one and the base; (iii) a minute columellar fold rather nearer the second tooth than the base. Long. 10-4 ; lat. 5'5 ; apert. 6'7x4'7 ; last whorl 9'G x-2 MAKINULA TRISTANENSIS, sp. nov. Epidermis purple-black ; lines of growth eroded white. Mr. G. C. Robson has very kindly examined the anatomy, on which I am therefore enabled to present the subjoined report :— On the Anatomy of Marinula tristanensis.—By G. C. EOBSON, (Published by permission of the Trustees of the British Museum.) It was hoped that the ample material representative of this species, received for examination from Dr. Peringuey, would have afforded an excellent opportunity forgiving a complete account of the anatomy of this interesting form, the generic position of which is now treated for the first time from the anatomical standpoint. It is to be regretted, however, that the specimens obtained were in such a state of contraction as to render dissection of anything more than the gross anatomy an impossibility. It was possible to make out a certain amount by sections stained with Haematoxylin and Methylene Blue, but the time available for continuing this method not being forthcoming the author is compelled to publish only such descriptions as may serve to indicate approximately the systematic position of the genus, together with a few other notes. The radida (Fig. 1) differs in many well-marked characters from those of the genera usually regarded as closely akin to Marinula. There are in each row numerous teeth—about 230—the general form and disposition of which readily place it among the Auricididae. The lateral teeth present a simple
Size: 1228px × 2035px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsouthafricanmuseum, bookcol, booksubjectnaturalhistory
