256 GASTROPODA. [Pectinibranchia. 



2. Triphora fascelina, Suter, 1908. Plate 15, fig. 4. 



Triphora fascelina, Suter, P. Mai. S., viii, 38, pi. 3, f. 49. 



Shell small, slender, and narrow. Sculpture : The polygyrate proto- 

 conch has the first whorl smooth, the second microscopically finely 

 spirally striate, and the remaining three whorls axially plicated and 

 slightly angled at the periphery ; the next seven whorls have two equal 

 keels, but the later whorls have a fine spiral thread intercalated be- 

 tween them ; all these keels are crossed by about 15 axial riblets, the 

 points of intersection raised into rounded gemmules ; a fourth supra- 

 sutural keel below the periphery of the last whorl, and 2 upon the 

 base. Colour of protoconch light brown, the other whorls white with 

 a central fulvous spiral band on the lower whorls ; base fulvous. 

 Spire high, conical ; outlines slightly convex. Protoconch high, of 

 5 convex subangled whorls, the nucleus globose. Whorls about 15, 

 regularly increasing, flattish ; base flat. Suture impressed, sometimes 

 lightly margined by the suprasutural keel. Aperture vertical, sub- 

 quadrate, with a short, straight, and narrowly open canal below, 

 its base slightly emarginate. Outer lip thin, sharp, sinuated by the 

 spiral sculpture, with a shallow sutural sinus. Columella vertical, 

 slightly arcuate, ending in a point upon the inner margin of the canal. 

 Operculum unknown. 



Diameter, 1-6 mm. ; height, 4-8 mm. (shell of 15 whorls). 



Animal unknown. 



Type in my collection. 



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

 (Captain Bollons) ; near Cuvier Island, in 38 fathoms (Captain Bollons). 



Remarks. The species is nearly allied to T. innotabilis, Hedley, 

 from Sydney Harbour, which, however, is brown, the gemmules white 

 and more numerous, and the spur of the basal lip is crossing the pillar. 



3. Triphora Huttoni, Suter, 1908. Plate 15, fig. 1. 



Triphora Huttoni, Suter, P. Mai. S., viii, 38, pi. 3, f. 48. Cerithium (Ino) 

 minimus, Hutton, C.M.M., 27. Triforis Angasi, Crosse : von Martens, 

 Errata and Addenda to C.M.M., 1874, 2 ; Hutton, J. de Conch., 1878, 26. 

 Triphoris Angasi, Crosse : Hutton, M.N.Z.M., 75 ; P.L.S. N.S.W., ix, 

 936 : Index, 76, not of Crosse. 



Shell small, acicular, rather fragile, slightly polished. Sculpture : 

 The first whorl smooth, the next one or two with 2 keels, succeeding 

 whorls with 3, the last with 4 keels, and 1 upon the base ; sometimes 

 the last two to four whorls bear 4 keels, the lowest of which, however, 

 may be reduced to a suprasutural thread ; the axial sculpture is 

 variable fine growth-lines in the interstices between the keels, or 

 distinct threads passing over the keels, very often rendering them 

 moderately nodulous. Colour light brown. Spire high, subcylin- 

 drical ; outlines straight. Protoconch of 1 broadly convex whorl. 



