258 GASTROPODA. [Pectinibranchia. 



Hab.Qft Great Barrier Island, in 110 fathoms (type) ; near Little 

 Barrier Island, in 20 fathoms (R. H. Shakespear) ; near Channel 

 Island, Hauraki Gulf, in 25 fathoms ; Whangaroa Harbour (C. Traill) ; 

 Stewart Island. 



Remark. This species is very variable in size. 



5. Triphora lutea, Suter, 1908. Plate 15, fig. 5. 

 Triphora lutea, Suter, P. Mai. S., viii, 39, pi. 3, f. 50. 



Shell small, slightly polished, fragile, slender. Sculpture : The 

 protoconch is smooth, with 2 keels, the lower of which is much more 

 prominent ; the adult whorls have 3 keels, the uppermost a little 

 narrower ; these are crossed by about 16 axial riblets, with deep and 

 slightly narrower interstices between them ; the crossing-points pro- 

 duced into rounded, not very prominent, nodules ; on the last whorl 

 there is a fourth suprasutural smooth keel, and 2 upon the base. 

 Colour light orange, white toward the apex ; old dead shells are dull 

 white. Spire subulate ; outlines straight. Protoconch consisting of 

 3 whorls, the nucleus pointed and slightly oblique. Whorls about 10. 

 regularly increasing, lightly convex ; base moderately convex. Suture 

 deep, sometimes margined by a suprasutural thread. Aperture vertical, 

 ovate, angled above, produced below into a straight, short, and open 

 canal, but faintly emarginate at the base. Outer lip sharp, slightly 

 sinuate, with a shallow sutural sinus. ColumcUa perpendicular, nar- 

 rowed below to a point. Operculum unknown. 



Diameter, 1-8 mm. ; height, 5-5 mm. (shell of 10 whorls). 



Animal unknown. 



Type in my collection. 



Hab. Snares, in 50 fathoms (type) ; Bounty Islands, in 50 fathoms 

 (Captain Bollons). 



Fam. VERMETID^!, d'Orbigny. 



Tubulibranchidta, Cuvier, 1830. Tubispir/ita, Deshayes, 1830. Protopoda, 

 Gray, 1837. 



Animal vermiform, elongated, with short snout and 2 distant 

 short pedal tentacles, one on each side of the suprapedal gland, bear- 

 ing eyes at their outer bases ; foot small, discoidal ; a. single elongated 

 branchia ; no copulatory organ ; 2 corneous jaws. Radula having the 

 formula 2+1 + 1+1 + 2; the central tooth trapezoidal, multicuspidate, 

 the median cusp large and pointed ; lateral teeth multicuspidate ; 

 marginals with 1 or 2 lateral cusps. 



Shell tubular, sometimes septate within, attached or free ; some- 

 times regularly spiral when young, always becoming irregular in the 

 adult growth ; aperture rounded, usually entire, sometimes fissured. 

 Operculum corneous, annular, sometimes spiral, rarely absent. 



These animals, generally attached upon stones, shells, or coral, 

 or living in sponges, often gregarious in large colonies, although with- 

 out copulatory organs are unisexual, oviparous or viviparous. The 



