260 GASTROPODA. [Pectmibranchia. 



crossed by unequal longitudinal lines and riblets, mostly distinctly 

 moniliform ; the longitudinal sculpture is predominant, but very 

 often the surface is irregularly reticulated by the distinct growth- 

 marks. There are no internal septa, and no operculum. Transverse 

 section subcircular. 



Animal having a long and oval cephalic shield ; tentacles short, 

 with the eyes at a certain distance from the base ; 2 small and rather 

 short tubercles in front of the mouth ; foot extending beyond the 

 head, cross-shaped. The whole of the body is light brown, the foot 

 with white spots in front ; the mantle is white, its margin brown. 

 (Q. & G.) 



Type in the Mas. Hist. Nat., Geneva. 



Hob. North and South Islands, from between tide-marks to about 

 25 fathoms ; Chatham Islands. 



The type is from Australia, and it occurs also in Tasmania. 



Fossil in the Pliocene and Miocene. 



2. Serpulorbis zelandicus, Quoy and Gaimard, 1834. Plate 40, 

 fig. 10. 



Vermetus zelandicus, Q. & G., Voy. Astrol., iii, 293, pi. 67, f. 16, 17. 

 Cladopoda zelandica, Q. & G. : Morch, J. de Conch., vii, 349. Ver- 

 metus novce-zealandice, Q. & G. : Gray, Figs. Moll. Anirn., ii, 28, pi. 56. 

 f. 6. Vermetus (Bivonia) neozelanicus, Q. & G. : Hutton, P.L.S. N.S.W., 

 ix, 942. V. (Thylacodes) zelandicus, Gray, Man. Conch. (1), viii, 182, 

 pi. 54, f. 81. Verrnicularia zelandica, Q. & G., Index, 76. 



Shell moderately large, vermiform, agglomerated, the first few 

 whorls spirally coiled up, then more or less irregularly twisted ; the 

 protoconch small, smooth, globular. Sculpture consisting of irregular 

 transverse rugose growth-marks ; the longitudinal striae are incon- 

 spicuous or absent altogether. Internal septa are present. Trans- 

 verse section circular. No operculum. 



Animal with the head blackish, with red spots ; margin pale 

 yellow ; foot spotted with red. The head is yellowish behind, brown 

 and dotted with red in front ; mantle broadly bordered with 

 orange. 



Type in the Mus. Hist, Nat., Paris. 



Hab.-Ea.-y of Islands, type (Q. & G.). 



Genus 2. SIPHONIUM, Morch, 1859. 



Siphonium, Morch, J. de Conch., vii, 1859, 353. Type : Vermetus moxinms, 

 Sow. Stoa, de Series, 1855 (in part). 



Shell adherent, irregularly twisted, carinated, without internal 

 armature. Operculum large, smooth, circular, concave externally, 

 the scar of attachment central, with rugose concentric strife, and plain 

 margin ; the whole surface covered with microscopic siliceous spiculse, 

 not horny as in Stephopoma. 



