MONOGEAPH OF THE GENUS 



FASCIOLARIA. 



Testa canalifera late fusiformis, medio vel supra medium 

 ventricosa, epidermide plerumque tenui induta ; apertura 

 pyriformi, supra medium extensa, labio interno versus su- 

 turam calloso et canalifero, supra canalem triplicate, plica 

 inferiori majori, canali aperto. Operculum corneum, unguicu- 

 latum. — Distinguished among fusiform channelled shells by 

 the three plaits on the columella increasing in size down- 

 wards. F. 'porphyrostoma and F. Theraites are aberrant in 

 form. 



Species. 



1. GiQANTEA, f. 1, 2, 29, SO, Kiener {Orb. ante?).— Testa 

 magna ventricosa, solidiuscula, fulvo-rubescens, spiraliter 

 costis latis complanatis et minoribus intermediis cincta ; an- 

 fractibus supra medium angulatis, tuberculis maximis solidis 

 munitis ; apertura rubescenti, quam spira longiori labio 

 externo expanse, margine undato, canali recto brevi lato ; 

 epidermide fusco crassiusculo. — Figs. 1 and 2 represent, in my 

 view, the young state of this species, named by my late 

 father F. papiUosa (Tanc. Cat. App.) as received by Keeve 

 and others, and probably F. Fischeriana by Kuster. Fig. 

 29 is from the British Museum specimen nearly two feet 

 long, and f. 30 from a fine, less-developed specimen in Mr. 

 Hanley's collection. The shell figured by Kiener ranks be- 

 tween the two latter, and completes the chain connecting 

 F. papulosa with F. gigantea. 



2. PRiNCEPS, f. 5, Sowerby. — Testa elongato-fusiformis, 

 utrinque acuminata, aurantia, epidermide fusco crasso induta, 



