OCR Text |
Show 134 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Feb. 19, Distribution. Bay of Biscay ('Travailleur ' Exp. 1880 and 1881), southern districts of tbe Mediterranean and coasts of northern Africa, and the Adriatic ; 70-552 fms. S. kuzmici of Brusina. Tiberi considered the present species S. muricata of Risso; but I cannot agree with him in this determination. Risso's figure 45 looks more like S. frondosa, and Ins description of S. muricata may be applicable to almost any species. This is a more slender shell aud has fewer ribs than S. trevelyana of the same size. The young of S. turtona is also more conical, and the ribs are compressed and continuous, instead of being sharp and muricated or prickly at the top of each whorl. Some of the ribs are occasionally varicose or dilated as in other species of Scalaria. 6. SCALARIA ALGERIANA, Weinkauff. (Plate X. fig. 5.) S. coronata, Weink. in Journ. de Conchyl. x. p. 348. S. algeriana, id. in op. cit. xiv. pp. 241, 247. •Porcupine' Exp. 1870: Atl. St. 17a, 26-34, 36; Med. 50, Adventure Bank. Distribution. C. Breton (de Folin); and the Mediterranean coasts of Spain, Italy, and Algeria ; 15-130 fms. Fossil. Pliocene: Siena, Reggio, and Messina. I do not agree with Hidalgo that this is the S. uncinaticosta of d'Orbigny (Moll. Cuba, pi. xi. f. 25-27), which is described as " rosea, anfractibus 9, costis 11 crassis, inaequalibus." After a careful examination and comparison of Weinkauff's descriptions of his S. algeriana and *S. schultzii with each other as well as with his typical specimens of those species, I have failed to make out any difference between them. Both have the interstices of the ribs spirally or transversely striated in the same manner. The present species also agrees with S. pulchella of Bivona in that respect; but the spiral striae are finer and less distinct in #. pulchella than in $. algeriana, the longitudinal ribs are more than twice as many in the former as in the latter species, and the shape is rather conical instead of cylindrical. Another synonym of S. algeriana is S. multi-lineata of Philippi (Zeitschr. f. Mai.) ; but that name was preoccupied by Say for a v\ ell-known North-American species. Rissoa 1 coronata of Scacchi, described and figured by Philippi in his work on the Mollusca of the two Sicilies, being the same species as <S. hellenica of Forbes, perhaps coronata ought to replace algeriana ; but it is immaterial. 7. SCALARIA NANA l, Jeffreys. (Plate X. fig. 6.) S H E L L conical, of a delicate texture, semitransparent, not glossy : sculpture, numerous and close-set curved lamellar ribs or ridges, of which there are about 30 on the body-whorl ; the interstices are crossed by a few spiral striae: the first 3 or 4 whorls are smooth Dwarf. |