. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. no ANNALS OF THE SOUTH AFRICAN MUSEUM deep sinus; canal moderately long. 33-34 (protoconch broken) x 12 mm.; and 46 x 15 mm. ^. Operculum ovate, nucleus apical, 9x4 h2pN ck mm. in 33 mm. shell. ( J / j White with yellowish-brown perio- stracum, operculum amber. Radula with 60 pairs of teeth, no central plate, lateral with wing-like appen- dage. Type locality. Off Baboon Point (Saldanha Bay), 31 fathoms (S. Afr. Mus. A1738, Coll.). 260 33' S., 150 E. (off Liideritzbucht), 55 metres (Fisheries Sur
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. no ANNALS OF THE SOUTH AFRICAN MUSEUM deep sinus; canal moderately long. 33-34 (protoconch broken) x 12 mm.; and 46 x 15 mm. ^. Operculum ovate, nucleus apical, 9x4 h2pN ck mm. in 33 mm. shell. ( J / j White with yellowish-brown perio- stracum, operculum amber. Radula with 60 pairs of teeth, no central plate, lateral with wing-like appen- dage. Type locality. Off Baboon Point (Saldanha Bay), 31 fathoms (S. Afr. Mus. A1738, Coll.). 260 33' S., 150 E. (off Liideritzbucht), 55 metres (Fisheries Survey vessel. Africana II, AFR. 1224); also AFR. 1263, 260 33' S., 140 17' E., 311 metres, and , 260 S., 140 35' E., 183 metres. Remarks. All the specimens taken by the Pieter Fame are more or less corroded, the protoconch broken off and, even in the smallest example (22 mm.), the apex stopped with secondary shelly substance. The 1st and 2nd whorls appear to have been smooth, the ribs beginning on the 3rd whorl. The 4 Africana examples, 18x8 mm. up to 46 x 15 mm., though more slender, are obviously conspecific. The protoconchs are broken off and the early whorls corroded, though not so much as in the Saldanha Bay examples. Consequently the lirae are more prominent, and owing to the slight lengthening of the whorls there is an additional spiral lira on each whorl, and 15-20 lirae on the base. At first glance there appears to be a likeness between the Africana 46 mm. example and the enlarged figure of macilenta Melvill (see Drillia platy- stoma, p. 125), but the proportion of aperture to spire, and number of ribs and spiral lirae, are different. In sculpture this species is rather similar to the worn 18-6 mm. Drillia halidoma Bartsch 1915 from the 'Cape of Good Hope'. The latter, however, has fewer spiral lirae (see Clavalula semicostata). Three specimens, 26, 27 and 33 mm. long, from off Cape Point, 250-700 fathoms (S. Afr. Mus. A362-A364, Coll.), agree with the above
Size: 1116px × 2239px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
