538 GASTROPODA. [Ojristhobranchia. 



thin, its edge narrowly reflexed, showing a slight fold where it joins 

 the body of the shell ; lip retreating above, but not distinctly sinused. 



Distribution. Most seas. Feeding on Algce and Zostera. 



Fossil in the Miocene and Pliocene. 



KEY TO SPECIES. 

 a. Shell subglobular oval . . . . . . . . . . zelandice. 



aa. Shell elongate-cylindrical . . . . . . . . cuticulifera. 



1. Haminea cuticulifera, E. A. Smith, 1872. Plate 46, fig. 30. 



Haminea cuticulifera, E. A. Smith, A.M.N.H. (4), ix, 1872, 350 ; Smith, 

 Zool. Col. H.M.S. " Alert," 1884, 87, pi. 6, f. H ; Angas, P.Z.S., 1877, 

 189 ; M.N.Z.M., 122 ; Man. Conch. (1), xv, 372, pi. 41, f. 13. Cylichna 

 cuticulifera, E. A. Smith : Watson, Chall. Rep., xv, 663. 



Shell elongate-cylindrical, above and below roundly quadrate, thin, 

 white, light horny and semitransparent when fresh, spirally finely and 

 distantly grooved. Sculpture consisting of fine flexuous growth-lines, 

 and rather distant fine spiral linear grooves, closer together and more 

 distinct on the base. Colour white, buff-tinged toward base and 

 vertex ; uniformly light horny when fresh. Epidermis very thin, 

 shining. Vertex impressed, imperf orate, the lip reflexed at the centre. 

 Body-whorl cylindrical, narrowly angularly rounded above, straight 

 in the middle, the base flatly convex. Aperture as high as the shell, 

 narrow above, scarcely produced above the vertex, widened below. 

 Outer lip thin and sharp, thickened at its insertion in the middle of 

 the vertex, produced and angularly rounded above, almost straight 

 at the middle. Basal lip faintly convex. Columella short, rather 

 straight, with the inner lip reflexed over it and forming a thin glaze 

 on the convex parietal wall. 



Diameter. 6-5 mm. ; height, 14 mm. (type). Diameter, 6 mm. ; 

 height, 13-5 mm. (my New Zealand specimen). 



Animal unknown. 



Type in the British Museum. 



Hob. New Zealand. Also Port Jackson and Botany Bay, in 2 to 

 15 fathoms ; Levuka, Fiji, in 12 fathoms. 



2. Haminea zelandiae, Gray, 1843. Plate 49, fig. 8. 



Bulla zelandice, Gray, Dieff. N.Z,, 243. Haminea zelandice, Gray, Ereb. & 

 Ter., 5, pi. 1, f.' 10 : M.N.Z.M., 121 : Man. Conch. (1), xv, 373, pi. 41, 

 f. 11, 12; pi. 40, f. 86. H. obesa, Sowerby, Conch. Icon., xvi, 1868, 

 f. 13; M.N.Z.M., 121. Bulla (Haminea) pemphis, Philippi : Adams, Thes. 

 Conch., 580, pi. 124, f. 91 ; Sowerby, Conch. Icon., xvi, f. 12 ; not of 

 Philippi. 



Shell subglobular-oval, thin and fragile, with a light-brown epi- 

 dermis, the vertex imperforate. Sculpture consisting of distinct close 

 oblique and sinuous growth-lines, crossed by very fine and dense 

 microscopic spiral strise, always distinct on the last half-turn of the 



