. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Marine Mollusca in the Collections of the South African Museum. 311 Turritella sanguinea Reeve. Conch. Icon., v, pi. vi, fig. 27, May 1849. T. puncticulata Sowerby, , 1870, p. 253. T. punctulata, D. (by error), Marine Shells S. Africa, p. 39, pi. v, fig. 102, 1892. Reeve described this species from California, but no such shell is known from that region. A comparison of the types, which came from the Belcher collection,. # e f & h Fig. 1.—T. sanguinea Rve. a-f, half nat. size ; g, juvenile,
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Marine Mollusca in the Collections of the South African Museum. 311 Turritella sanguinea Reeve. Conch. Icon., v, pi. vi, fig. 27, May 1849. T. puncticulata Sowerby, , 1870, p. 253. T. punctulata, D. (by error), Marine Shells S. Africa, p. 39, pi. v, fig. 102, 1892. Reeve described this species from California, but no such shell is known from that region. A comparison of the types, which came from the Belcher collection,. # e f & h Fig. 1.—T. sanguinea Rve. a-f, half nat. size ; g, juvenile, enlarged ; h, portion of operculum, enlarged. with Sowerby's type of puncticulata, shows that the two shells are identical, the former specimens being somewhat immature and slightly " ; Probably Sowerby was misled by the false locality of sanguinea into describing it over again. In 1889 he recorded* a " somewhat doubtful " specimen of T. sanguinea Rve. from South Africa. This species is much subject to scalarescence, and two very different forms are figured by Martensf and Sowerby.{ I am able to illustrate this variation by a series of admirable drawings by Dr. Barnard of the South African Museum. The former author compares puncticulata with sanguinea, and concludes that they are nearly related but distinct, mainly owing to a difference in the number of spiral ribs. The comparison is, however, discounted by the fact that his only exponent of sanguinea was a specimen from the Paetel collection, which may possibly not have been sanguinea at all : moreover, both the character of the ribs and their number is variable even in examples dredged together ; small acces- sory riblets keep on developing between the larger ones ; these riblets increase in size on subsequent whorls and become large ribs, but even on the last whorl small riblets continue to make their appear- * J. of C, vi, 152. t Deutsch. Tief-See Exp., vii (1), pi. iv, fig. 9. X Marine Shell
Size: 2891px × 864px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
