258 



Judging by the figures representing the Lamarckian species, I 

 am constrained to regard F. ustulatus, Reeve, a synonym of it. 

 No locality was known to either Lamarck or Reeve ; but Angas 

 recorded F. iistidatus from St. Vincent-Gulf, where it has 

 occurred to other collectors in later years. Tryon quotes 

 S. sulcata as from South Australia, I have seen Victorian 

 examples of the species. 



Siphonalia oligostira, '<ptc. nov. Plate xi., fig. 6. 



This species resembles «S'. Mandarina, Duclos, of the New 

 Zealand fauna, but the revolving threads on the body-whorl, in 

 particular, are flat and without interstitial threadlets ; the 

 whorls are not S3 regularly convex, being slightly angulated 

 postuiedially ; the spire is proportionately much broader, and the 

 nucleus consists of one and a half very small turns, whereas in 

 S. Mandarinus it is cylindrical, of four whorls. 



The species makes a passage between aS'. Tasmaniensis and 

 S. Mandarinus in its faint shoulder and obsolete nodosities 

 thereon. 



Dimensions. — Length, 88-5 ; width, 42 ; length of aperture, 

 56 mm. 



Living on rocks at extreme low tides, Guichen Bay (S. Aust. 

 Mus.); Encounter Bay (^i)r. Verco). 



Genus Latirofusus, Cossmann. 



This genus was established by its author in "Annales de la 

 Soc. Roy. Malacologique de Belgique," 1889, p. 175, to include 

 certain shells having the outline of Fiisus, the plicated columella 

 of Latirus, and a globulose embryo. He referred to it the living 

 Fnsus lancea, Chemnitz, which probably includes F. acus, Adams 

 and Reeve, and two species of Fusus described by Deshayes from 

 the Eocene of the Paris basin. I venture to describe a second 

 recent species. 



Latirofusus nigrofuseus, yyer. nor. Plate xi., fig. 3. 



Shell lanceolate-fusiform, three and a half times as long as 

 wide, aperture one-half of the total length ; colour brown under a 

 black epidermis. 



Whorls seven and a half ; nucleus of one and a half whorls, 

 smooth, hemispheric, and large. 



Spire-whorls separated by a linear suture, almost flat, spirally 

 Urate ; commencing line two, increasing to seven, eight or nine 

 on the penultimate whorl, four of which are usually stouter tlian 

 the interposed ones. The transverse ornament consists of obscure 

 rounded plications (or they may be wholly obsolete), and of 



