. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO KNOWLEDGE OF MARINE MOLLUSCA 209 Remarks. Although similar to kowieensis, this species, as Thiele said, is quite distinct: the area between suture and upper peripheral lira is quite smooth except for the fine non-squamose axial plicae, and the axial plicae are fewer; the nodules in unworn specimens are more outstanding and strongly auriculate. In Thiele's specimen the 3rd (as here reckoned, = Thiele's 5th) lira on the base was not developed. t. Fig. 45. apex and operculum, (b) A
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO KNOWLEDGE OF MARINE MOLLUSCA 209 Remarks. Although similar to kowieensis, this species, as Thiele said, is quite distinct: the area between suture and upper peripheral lira is quite smooth except for the fine non-squamose axial plicae, and the axial plicae are fewer; the nodules in unworn specimens are more outstanding and strongly auriculate. In Thiele's specimen the 3rd (as here reckoned, = Thiele's 5th) lira on the base was not developed. t. Fig. 45. apex and operculum, (b) A. insignis (Sow.), (c) A. agulhasensis (a) Afritrophon kowieensis (Sow, (Thiele), with apex and protoconch further enlarged Afritrophon insignis (Sow.) Fig- 45(») 1900. Sowerby. Proc. Mai. Soc, iv, p. 2, pi. 1, fig. 1 (Trophon ? i.). 1925. Thiele. D. Tie/see Exp., xvii, p. 170, pi. 30 (18), fig. 14 (Trophon i.). 1947. Tomlin. loc. cit., p. 271. Protoconch ij whorls, bicingulate. Postnatal whorls 4; 1st whorl with axial ribs and 2 spiral lirae as in the two previous species; from end of 1st whorl the lower lira is for the most part occluded by the suture of the following whorl, though here and there a tiny auriculate tubercle projects; the upper lira becomes very prominent with 8 or 9 sharp, auriculate, upturned tubercles; on base the 2nd lira becomes visible again, with auriculate tubercles less prominent than those on the upper lira; no other lirae on base; fine growth- lines distinct. 6-5 X 3 mm. Kowie (= Port Alfred) (Sowerby, Bartsch, Turton, S. Afr. Mus.). Off Cove Rock (East London area), 22 fathoms, 3 dead but fresh (S. Afr. Mus. A8849. P. F. coll.). Remarks. In worn specimens the projecting tubercles become merely undulations on the peripheral keel; these undulations were not mentioned in the original description, but can be seen in the cotypes in S. Afr. Mus. Thiele recorded a 3-7 mm. juvenile from Great Fish Bay, Angola; but I feel that the identification needs confi
Size: 2491px × 1003px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
