134 



Professor Tate, in describing the ornament, says: — "Whorls 

 squarely rounded, deeply imj^ressed at the suture, with five 

 encircling ribs covered with tubular hollow spines, or slender, 

 vaulted, pointed scales ; the middle rib on the angle of the whorl 

 stouter than the rest, and furnished with long spines. Last whorl 

 shouldered and subtabulated, with two or three threads rarely 

 wanting on the posterior slope; the rounded base and canal with 

 equidistant similar spiral lirse, one or two on the canal are stouter 

 and provided with larger spines. The transverse ornament is very 

 peculiar, consisting of imbricating lamellae, more or less radially 

 disposed around the bases of the spines, and the bundles of one 

 row somewhat alternating with those of the next." 



The apertui'e is pyriform ; outer margin slender, crenulated ; 

 columellar border covered with a thin deposit of callus which 

 is continuous with the outer margin ; columella slightly excavated, 

 twisted anteriorly, and terminating in a very long anterior canal. 



The special character of the ornament and mode of growth 

 of the shell are not very typical of Fusus, but the protoconch 

 certainly is, as previously remarked ; and the differences mentioned 

 are not sufficiently important to remove the species from Fusus, 

 sensu stricto. 



Dimensions. — Length 14 mm.; breadth 5 mm.; length of aperture 

 3 mm. ; length of canal 6 mm. 



Form, and Loc. — Eocene : Muddy Creek, Victoria. 



G. 9437. Two specimens. Purchased. 



Fusus craspedotus, Tate. 



1888. Fusus craspedotus, Tate, Trans. Eoy. Soc. South Aust. vol. x. p. 134, 



pi. vii. fig. 4. 

 1893. Fusus craspedotus, Tate and Dennant, id. vol. xvii. pt. 1, p. 219. 



Shell very thin, fusiform ; with an elevated spire ; protoconch 

 composed of two smooth rounded turns ; whorls angular, compressed 

 into a narrow keel, serrate on the margin. The other ornament 

 is desciibed by Professor Tate as follows: — "Last whorl with the 

 posterior slope convex, depressed behind the keel, and much more 

 so at the suture; the rounded and contracted base is produced 

 into a long, rather broad, somewhat flexuous beak ; ornamented on 

 the posterior slope with numerous inconspicuous sj)iral threads, 



