. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. i6 ANNALS OF THE SOUTH AFRICAN MUSEUM Trifora algoensis Thiele Fig. 19 h Trifora algoensis Thiele, 1925, p. 128, pi. 22 (10), fig. 19. Trifora retusa Turton, 1932, p. 117, pi. 25, no. 855 (= juv.). Protoconch 1J whorls, with 2 series of 12-14 nodules. Postnatal whorls 12, 1st and 2nd with 2 series of nodules, a 3rd series interpolated on 3rd (or 4th) whorl, which on 6th or 7th whorl becomes as strong as the others; nodules increasing to 28-30 on last whorl, connected by axial ribs. Base with feebly n
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. i6 ANNALS OF THE SOUTH AFRICAN MUSEUM Trifora algoensis Thiele Fig. 19 h Trifora algoensis Thiele, 1925, p. 128, pi. 22 (10), fig. 19. Trifora retusa Turton, 1932, p. 117, pi. 25, no. 855 (= juv.). Protoconch 1J whorls, with 2 series of 12-14 nodules. Postnatal whorls 12, 1st and 2nd with 2 series of nodules, a 3rd series interpolated on 3rd (or 4th) whorl, which on 6th or 7th whorl becomes as strong as the others; nodules increasing to 28-30 on last whorl, connected by axial ribs. Base with feebly nodulose peripheral lira, which is more or less visible in the sutures on later whorls; one strong lira below it. 9-5 X 2-5 mm. 340 51' S., 190 37' E., 80 metres; 340 8' S., 240 59' E., 80 metres; 330 50' S., 250 48' E., no depth stated (Thiele). Still Bay (S. Afr. Mus. coll. Muir). Off Tugela River (Natal), 47 fathoms, 1 adult; off Cape Natal, 85 fathoms, 1 apex; off Umkomaas River, 40 fathoms, 2; off Cape Morgan, 47 fathoms, 1 adult, 6 immature; off Cove Rock (East London), 22 fathoms, 4; 340 5' S., 25° 55' E., 67 fathoms, 2; 340 S., 250 44' E., 33 fathoms, several apices; 340 26' S., 250 42' E., 124 fathoms, 2; 340 5' S., 250 43' E., 52 fathoms, 1; off Cape Infanta, 46 fathoms, 3 apices; all dead (S. Afr. Mus. coll.). Distribution. Great Fish Bay, Angola (Thiele). Remarks. This does not seem to be synonymous with any of Bartsch's species. The short, blunt protoconch, nodulous almost from its nucleus, is distinctive. The protoconchs and juveniles collected by Dr. Muir show that retusa is merely the juvenile of algoensis. Turton's description of 3 rows of tubercles on each whorl belies his figure. Trifora cf. superba Thiele Fig. 20 a Trifora superba Thiele, 1925, p. 127, pi. 22 (10), fig. 15. Incomplete and worn specimens, the largest consisting of 10 whorls, measuring 4x1-5 mm. Protoconch worn. Two spiral series of nodules on each postnatal whorl, connected by narrow inc
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