Siphonium.] GASTROPODA. 261 



1. Siphonium lamellosum, Hutton, 1873. Plate 40, fig. 11. 



Siphonium lamellosum, Hutt., C.M.M., 30 ; J. de Conch., xxvi, 29 ; M.N.Z.M., 

 85. Vermetus (Siphonium) lamellosus, Hutton, Man. Conch. (1), viii, 

 184; P.L.8. N.S.W., ix, 942. Vcrnnodaria lamellosa, Hutt., Index, 76. 



Shell thick, irregularly twisted, with numerous imbricating trans- 

 verse ridges, which are often reflexed, and obsoletely carinated. Aper- 

 ture circular ; internal septa are present. Operculum hemispherical. 



Diameter of aperture, 5 mm. 



Type in the Dominion Museum, Wellington. 



Hob. Cook Strait, in deep water (type) ; Chatham Islands ; Bay of 

 Islands (J. C. Anderson). 



Remark. May be attached to other bodies, or forming unattached 

 large masses. 



Genus 3. STEPHOPOMA, Morch, 1860. 

 Stephopoma, Morch, J. de Conch., 1860, 42. Type : Vermetus roseus, Q. & G 



Adult shell adherent, spiral, solitary or clustered ; aperture slightly 

 inflexed above, very obsoletely effused below, without internal lamellae. 

 Operculum slightly concave, multiannulate, furnished with long di- 

 vergent multifid horny bristles. 



Recent and fossil. 



KEY TO SPECIES. 



a. Whorls not carinated, protoconch smooth ; bristles of oper- 

 culum simple, multifid at base only . . . . . . roseum. 



b. Whorls carinated, protoconch minutely granular ; bristles of 



operculum multifid . . . . . . . . nucleogranosum. 



1. Stephopoma roseum, Quoy and Gaimard, 1834. Plate 15, 

 figs. 6, 6a. 



Vermetus roseus, Q. & G., Voy. Astrol., iii, 300, pi. 67, f. 20-23. Siliquaria 

 Icevicjata, Lamk. : Hutton, C.M.M., 31, not of Lamarck. Vermetus 

 (Stephopoma) roseus, Q. & G. : v. Martens, Crit. List., 28. Stephopoma. 

 roseum, Q. & G. : Hutton, M.N.Z.M., 85; Man. Conch. (1), ix, 185, 

 pi. 55, f. 94. Vermicular ia rosea, Q. & G., Index, 76. 



Shell cylindrical, vertical; spiral sometimes very loosely coiled, 

 or the volutions are close together, giving the shell a Cydostoma-]ike 

 appearance ; surface rugose, nucleus smooth. Colour pink, dead 

 shells white to brown, white in alcohol. Opi'in/Inui circular, brown, 

 with numerous horny divergent and multifid corneous bristles. Ac- 

 cording to the figure given by Quoy and Gaimard, the bristles are 

 multifid at their base, with a long simple median bristle. 



Length of shell, 13-18 mm. 



Animal having the foot long, cylindrical, with the operculum at 

 its extremity. In front of the snout is a median vertical funnel- 

 shaped appendix, which can be stretched out. Foot with a small 



