132 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Feb. 19, 



Distribvtion. Portugal (McAndrew, as M. sulcata), Gibraltar 

 (McAndrew and Ponsonby) !, Algeciras {Paz, f. Hidalgo, as M. 

 brevialis), Aci-Trezza, Sicily (Aradas, as last), jEgean {Forbes, as 

 Turritella sutura/is), Algiers (coll. Weinkauff) !, Mogador (McAn- 

 drew, as 31. sulcata, var.) ! 



The name suturalis is not classical, but it may have been used to 

 signify the suture, which is conspicuous in this species. Reeves's 

 figure is not satisfactory, because it does not show the peculiar shape 

 of the mouth. The characters by which Mesalia (Gray, 1842) may 

 be distinguished from Turritella seem to consist in the operculum of 

 the former being paucispiral instead of multispiral, the apex of the 

 spire being blunt and regular or mammiform, the outer lip flexuous, 

 and the mouth at its base expanded or effuse. Turritella brevialis 

 of Lamarck is a larger shell, and is described as smooth with a single 

 furrow near the suture. The type of Gray's genus is Turritella 

 sulcata of Lamarck, a Grignon or Eocene fossil, which therefore 

 cannot be the present species, although it was mistaken for it by 

 McAndrew. 



Family XV. ScALARiiDiE. 



1. Scalaria subdectjssata, Cantraine. 



S. svbdecussata, Cantr. Diagn. Moll, in Bull. Acad. Brux. ii. 

 p. 338 ; Mai. Med. pi. vi. f. 24. 



'Porcupine' Exp. 1870: Atl. St. off C. Sagres, 28-28 a, 30; 

 Med. 55, Benzert Road. 



Distribution. Atlantic coasts of France and Spain, Mediterranean, 

 Madeira, and Canaries, 20-57 fins. 



Fossil. Pliocene: Altavilla (Tiberi). 



Mesalia stria/a of A. Adams according to McAndrew, but this 

 species is described as from the Philippine Islands. It is, how- 

 ever, M. plicata of Adams from the Canary Isles, and Turritella 

 philippi of Aradas and Benoit. 



Some specimens are throughout ribbed lengthwise, while others 

 have slight and indistinct ribs on the upper whorls only. The shell 

 is equally variable with respect to the number, and in part occasional 

 absence of the spiral striae. The sculpture in one of the ' Porcupine ' 

 specimens closely resembles that of Turbo corrugatus, Brocchi, and 

 the base is likewise keeled ; but the whorls in the present species 

 are compressed or flattened, and in Scalaria corrugata they are 

 convex and the suture is deep. 



Monterosato has given some interesting particulars of the animal 

 in the 'Journal de Conchyliologie ' for 1878, p. 152, showing dif- 

 ferences from Turritella and Scalaria. 



v 2. Scalaria longissima, Seguenza. (Plate X. fig. 3.) 

 S. longissima, Seg. Form. Terz. Reggio, 1879, p. 266. 

 ' Porcupine ' Exp. 1869 : St. 45. 1870 : Atl. 16. 

 Distribution. Azores ('Talisman ' Exp. 1883); 681 fms. 

 Fossil. Pliocene : Messina, and Reggio in Calabria (Seguenza). 

 The ' Porcupine ' specimens are imperfect, but those from the 



