424 



MONOTOCARDIA RACHIGLOSSA 



Jumala), subg. Sipho ; Sip>1ioncdia (subg. Kelletia). Group ii. 



Liomesus ( = Buccinopsis). Group iii. Buccinum (Fig. 1b, p. 6 ; 



subg. Volutharpa, Neohuccinuin). Group iv. Cominella, Triton- 

 idea, Pisania, Euthria ; Anura (Miocene), 

 Genea (Pliocene), Metida, Bngina. Group v. 

 Phos, Hindsia. Group vi. Pipsaccus ( = 

 Phurna), Macron. Group vii. Pseudoliva. 



Fam. 6. Turhinellidae. — Central tooth 

 of radula tricuspid, median cusp strong, 

 lateral bicuspid, cusps unequal (Fig. 117, 

 p. 220); shell fusiform or pear-shaped, 

 heavy, canal often long, operculum corneous, 

 claw - shaped, nucleus terminal. Miocene 



. l*rincipal genera : Turhinella, Cyno- 



donta, Tudida (subg. Streptosiplwn)\ Piropsis 

 (Cretaceous), Perissolax (Cretaceous), Strcjj- 



FiG. 2S0.—Turbinena pyr- sidura (Eoceuc, subg. WMtneya), Mchipium, 

 «m Lam., Ceylon, x g. Fidgur { = Busycon, Fig. 150, p. 249, in- 

 cluding Sycotypus), Melongena (subg. Pugilina, Myrisiica) ; Pio- 



stoma (Eocene), Hemifusus (subg. Meg alatr actus), Ptychatr actus, 



Meyeria. 



Fam. 7. FasciolarHdae. — Eyes at the outer base of the tenta- 

 cles (radula. Fig. 121, p. 221); shell 



fusiform, spire long, canal often very 



long, columella often with a fold at 



the base ; operculum corneous, nucleus 



terminal. Cretaceous . Principal 



genera; Picsus (including Sinistralia, 



Aptyxis, Troschclia), with subg. Serri- 



ftcsiis (Cretaceous), Clavella (subg. 



Thersites), Pasciolaria, Patirus (subg. 



Polygona, Peristernia, Peucozonia, 



Pagena ; Mazzalina (Eocene), Chascax). 

 Fam. 8. Mlfridae. — Siphon rather 



long, with anterior appendages, eyes 



on the side of the tentacles, proboscis 



very long ; radula variable, laterals Fig. 281. — Latirus [Leucozonia) 



,. 1 ,/T-'- -I i\r\ 4-ioi\ cinqulahis Wood, Panama. 



sometimes lost (lig. 120, p. 221); 



shell fusiform, solid, spire more or less pointed, columella with 



several prominent folds, the posterior the largest, aperture rather 



