Genus Latirus. 373 



der Schneck II., pp. 60 — td^ pi. 5, figs. 12 — 20, pi. 6, figs. 

 I — 3), confirming the opinion that they all had three plates 

 in each series, the lateral being transversely elongated and 

 many cuspidate, the middle tooth square with three to five 

 cusps. He placed Ftisus Syracusanus (L.) an inhabitant 

 of the Mediterranean, since it possessed the identical 

 dentition of the Latiri but not the columellar plaits, in a 

 new genus Aptyxis {gl-kti)^^ which, perhaps, it would be 

 convenient to retain, at all events as a section, at present — 

 although in the accompanying catalogue I have merged it 

 altogether in Latirus, 



In the year 1867, Stimpson removed Peristernia from 

 the LatiridcB for the obscure reason that one specimen (not 

 named) did not agree with the lingual dentition, but more 

 resembled Buccinidce. Probably this species has been long 

 since ousted from the genus — (v. Ant. /. Conch.^ i. p. 57. 

 sqq.). -^ / ' - c^ -?/ ^K<Xd^ 



In 1869 Prof E. von Martens proposed to unite the 

 whole series under one name Fasciolaria {Nachr. Mai. Ges, 

 L p. 190). 



The same year Dr. John Denis Macdonald, F.R.S- 

 {Ann. and Mag. of N. Hist., Vol. III., sec. iv., p. 113), in a 

 dissertation upon the dental plates and teeth of Proboscidi- 

 ferous Gasteropods, remarks : " Being well aware of the 

 existence of certain fusiform species having neither plaits 

 nor folds upon the columella of the shell, but with lateral 

 combs in the odontophore, I conclude that these would form, 

 with Cyrtulus (Hinds), a well-marked family." 



" Fasciolaria and Mitra form the types of two distinct 

 families, the former with its lengthy ribbon and narrow 

 median series, differing remarkably from the latter, which is 

 short and broad." 



The Revd. R. Boog Watson, F.R.S.E., in 1873 (P. Z. S. 

 P-P- S^Sj 364), established a genus Chascax, founded on a 



