. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 200 ANNALS OF THE SOUTH AFRICAN MUSEUM of xenomorphic ridges, strongly suggesting attachment to the ribbed mussel Aulacomya ater (Molina, 1782). In addition to the type series of C. c. praerugulosa, a set of eight specimens from an older deposit 1,5 km north of Langebaan (9,5 m ) has been examined. These are in a very poor state of preservation, but are morpho- logically most interesting. Not only is the apex in these specimens more terminal than in typical C. c. praerugulosa, and the shells on
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 200 ANNALS OF THE SOUTH AFRICAN MUSEUM of xenomorphic ridges, strongly suggesting attachment to the ribbed mussel Aulacomya ater (Molina, 1782). In addition to the type series of C. c. praerugulosa, a set of eight specimens from an older deposit 1,5 km north of Langebaan (9,5 m ) has been examined. These are in a very poor state of preservation, but are morpho- logically most interesting. Not only is the apex in these specimens more terminal than in typical C. c. praerugulosa, and the shells on the average more compressed, but the left side of the septum appears to be less lobate. This might be construed as indicating an origin from a porcellana-type ancestor. Much more and better material is needed, however. Family Buccinidae Triumphis dilemma sp. nov. Fig. 10 Type material Holotype: SAM-K4565. Paratype 1: NM-A1217/T1827. Diagnosis Anal canal well developed; shell covered by thin spiral lirae with feeble axial folds on the spire. Description Ovate-fusiform, aperture nearly twice length of spire, whorls moderately convex, aperture constricted, labrum thickened, expanded, anal canal trough- like, rendering the lip shouldered; labrum with ten internal ridges, terminating in denticles of which the anterior two are partially fused; labium with a. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
