276 GASTROPODA. [Pectinibranchia. 



2. Struthiolaria vermis, Martyn, 1784. Plate 40, fig. 2. 



Buccinum vermis, Mart., Un. Conch., ii, 1784, f. 53. Struthiolaria vermis, 

 Mart., Conch. Icon., vi, f. 4 ; Ad. G.R.M., pi. 27, f. 6 : Chenu, Man. Conch., 

 i, 263, f. 1653 ; Man. Conch. (1), vii, 133, pi. 12, f. 35, 36. S. australis, 

 Cmel., Syst. Nat., ed. xiii, i, 1790, 3542. S. crenulata, Lamarck, A.s.V., 

 vii, 1822, 148 ; Voy. Astrol., ii, 430, pi. 31. f. 7-9. S. inermis, Sowerby, 

 Thes. Conch., i, 1842, 23, pi. 5, f. 12, 13, 19. 



Shell not very large, ovato-acute, not very thick, turreted, imper- 

 f orate. Sculpture : The whorls are bicarinate ; the upper carina, 

 limiting the shoulder, is more prominent, and ornamented with more 

 or less distinct small nodules ; the lower keel is rounded, but faintly 

 nodulous, and low and smooth on the last whorl ; the interspaces 

 with unequidistant and subequal spiral lines, more distant and stronger 

 upon the base ; the growth-lines are numerous, flexuous, and distinct. 

 Colour cinereous or reddish-brown, with undulating streaks of darker ; 

 interior of mouth mostly white, sometimes pale violet ; peristome 

 yellowy margined with brown. Spire conical, turreted, very little 

 higher than the aperture. Protoconch of 2 convex whorls, finely 

 spirally striated, convex, the nucleus large and flat. Whorls 6 to 7, 

 regularly increasing, shoulder oblique, flat, interspace between the 

 upper and lower keel and between the latter and the suture concave ; 

 base flattened and somewhat depressed. Suture deeply excavated. 

 Aperture oval, higher than broad, with a rather wide channel above, 

 and a very short canal at the base. Outer lip thick and rounded, with 

 a shallow sinus on the middle and one at the base, where it is slightly 

 effuse. Columella oblique, arcuate, subtruncate below. Inner lip very 

 thick, broadly expanded on the base, spreading over the concave 

 parietal wall, and forming a prominent callus near the outer lip. Oper- 

 culutn small, unguiculate. 



Diameter, 29 mm. ; height, 45 mm. Angle of spire, 55-60. 



Animal Voy. Astrol., pi. 31, f. 8, 9 ; T.N.Z.I., xv, pi. 12. f. 6. 



Type lost. 



Hob. North Island ; very rare south of Cook Strait : Auckland 

 Harbour (H. S.) ; Manawatu ; Tasman Bay (Q. & G.) ; Queen Char- 

 lotte Sound, in 16 fathoms (Captain Bollons). Brought to England 

 by Captain Cook. 



Fossil. Miocene and Pliocene. 



Subsp. tricarinata, Lesson, 1830. 



tricurinata, Lesson, Ann. Sci. Nat. (2), xvi, 256. Struthiolaria 

 ii.f, subsp. tricarinata, Lesson, M.N.X.M.. (is. ,s'. xnitulata, Martyn: 

 Cray, in Cleft'. N.Z., 232; not of Martyn; C.M.M., 24. wrongly as of 

 Deshayes. 



Shell resembling very much S. vermis, but usually there appears 

 a third keel above the suture on the penultimate whorl, the body- 

 whorl having 3 keels, the uppermost distinct, the two lower ones 



