MONOGRAPH OF THE GENUS 



PYRULA. 



Testa canalifera plus miuusve pyriformis, supra medium 

 ventricosa, epidermide induta, columella kevi, canali aperto. 

 Operculum corneum, nucleo terminali. — Most of the species 

 group themselves naturally in this genus as distinguished 

 from the Fusi. With regard to the more difficult, the 

 general rule of distinction would be to put with the Pyrula? 

 those whose apertures are wide at the top and reach con- 

 siderably above the middle. 



(Species. 



1. ptktjlata (Fusus, f. 74), Reeve. — Testa tenuis, sub- 

 pyriformis superne longitudinaliter undata, spiraliter liris 

 validis distantibus et intermediis minoribus cincta, fulva ; 

 spira exserta, anfractibus ventricosis ; apertura magna, pyri- 

 formi. — In the difficulty of drawing a line between the 

 present and the preceding genera, I have hesitated as to this 

 species, which is a Fusus of Reeve, and which is figured in 

 our Plate VII. of Fusus. The posterior width and height of 

 the aperture, however, gives it more the aspect of a Pyrula, 

 in which genus I now place it. 



2. subrostrata, f. 39, Wood. — Testa subovata Isevis, crassa, 

 epidermide laevi induta, spira brevi anfractibus depressis 

 angulatis nodosis, ultimo subquadrato vix angulato, baud 

 nodoso, apertura alba, postice subcanaliculata, labio interno 

 crasso, labio externo intus crenato ; canali brevi, lato, trun- 

 cate — Of a thick substance and squarely oval form, with a 

 thickened inner lip forming a narrow canal at the spiral end, 

 canal short, broad, and truncated. 



