126 FUSIDA. 
the one is but the young state of the other.”—JLinn. Trans., 
XIU, 69. 
Mr. Vélain remarks that R. proditor (— R. argus) is very 
plentiful at the Islands of Amsterdam and St. Paul, in the Indian 
Ocean, where the skeletons of seals, abandoned on the rocks at 
low-water by the fishermen, were literally covered with lobsters 
and Ranell at the succeeding tide. They are nocturnal in habit 
and may be readily fished by suspending over-night, in 10 or 15 
métres depth, the body of a bird or fish. 
LAMPAS, Schum. (Colubraria, Schum. Crossata, Tutufa and 
Lampasopsis, Jousseaume.) Shell turreted ; whorls nodose ; 
aperture with posterior channel; canal very short and recurved. 
hk. bufonia, Gmel. (xlvi, 67). 
ASPA, H. and A. Adams. Shell ovate, ventricose, smooth ; 
spire very short; whorls nodulous at the angles; aperture with 
posterior channel. &. marginata, Gmel. (xlvi, 68). 
ARGOBUCCINUM, Klein. Spire elevated; canal short ; posterior 
channel wanting. &. pulchra, Gray (xlvi, 69). 
Famity FUSIDA. 
Shell more or less spindle-shaped, without varices; the lip of 
the aperture not thickened. 
Operculum ovate, acute, with apical nucleus. 
The animal possesses the essential features of a Murex. 
Dentition (x,8). That of the typical genus Fusus does not 
differ essentially from Fasciolaria ; Stimpson states (Am. Jour. 
Conch., i, 54) that it has the saw-like lateral teeth of Fasciolaria, , 
whilst Macdonald (Ann. Mag. Nat. Hist., 4th ser., ii, 243) found 
another species to possess lateral teeth of the Muricoid type. 
Troschel finds a Fasciolarioid dentition in Fusus Syracusanus, 
and he has accordingly made for it a new genus, Aptyxis; but 
Schacko has recently found the same dentition in Fusus incon- 
stans, Lischke, a typical Fusus. I think that Macdonald must 
have mistaken some other genus for Fusus. The dentition of 
Sipho, which, according to Troschel, resembles that of Fascio- 
laria, is shown by the more recent investigations of Sars to be 
Buccinoid. Ptychatractus, with evident resemblance to Fascio- ' 
laria, has a peculiar dentition, approaching Murex, and on this 
character alone Stimpson, followed by Gill, assigns to it a distinct 
family. 
Neptunea, Melongena, etc., long classed with Fuside, are now 
brought into more intimate relationship with Buccinum, and 
Busycon, and Tudicla will go into the same group; on the other 
hand Peristernia, Latirus, etc., formerly included in Turbinellide, 
have a Fasciolarioid dentition, which, with added conchological 
characters, may suffice for their removal from that to the present 
