144 rTEROPODA. 



recurvam producto. — In shape like a flattened bell with 

 angular sides, wrinkled concentrically ; having a rather narrow 

 aperture, the outer lip of which is narrowly produced beyond 

 the inner. 



25. INFLATUM, f. 33, 34, Eyd. et Soul. — Trigona, utrinque 

 convexa, ad latera acute angulata, disco dorsali leviter quin- 

 que-lobata, transverse tenuiter lirata ; apertura late hianti; 

 labiis subseqnalibus apice leviter recurvo, acuminato. — A 

 three-cornered sheath with the labial margins nearly equal 

 and wide apart ; the dorsal disc is five-lobed, and the sharp 

 apex gently turned back. 



26. CiiAPTALii, f. 37, Eyd. et Soul. — CI. inflaUe similis sed 

 disco dorsali baud lobato, labro paulo producto. — Of a rather 

 more simple form than sp. 25, having both discs smooth and 

 simple, and the edge of the dorsal disc is a little produced 

 beyond that of the_ventral. 



27. Orbignyi, f. 36, Soiverby. — Vagina angusta sub- 

 rotunda, elongata, versus apicem attenuata, deinde aciculata; 

 apice minutissime globoso ; apertara oblique s'ibrotunda; 

 margine dorsali producta rostrata ; margine ventrali sub- 

 arcuato. — In consequence of the union of the species of 

 Balantktm with those of Cleodora, it has become necessary 

 to change the specific name of the species from Balantiami 

 australe to Cleodora Orhignyi. 



Genus CRESEIS, Rang. 



Testa angustissime pyramidata, tubularis hyalina acumi- 

 nata. The shells of this genus may be described as hollow 

 glass thornlike tubes. 



28. aciculata, f. 45, 46, Orhigny. — Angustissima acumi- 

 nata subtortua dorso oblique carinato ; apertura subtrigona 

 labro producto acuminato ; apice aciculato vix curvo. — The 



