92 fusus. 



cornea induta, spira producta, apice oblique bulbosa mamil- 

 lata, anfractibus declivibus, vix convexis, ultimo magno, 

 canali rectiusculo, breviuseulo ; apertura pyriformi. Variat 

 perobliqua, liris latioribus, canali oblique tortuo. — In Chem- 

 nitz' plate two different forms are given. One is represented 

 by our figure 33, also by Sars ; but the specimen figured in 

 Jeffrey's British Shells must be rather an abnormal form. 

 The other is the much more oblique shell with a curved 

 canal and broader lirse now figured 149, from specimens 

 in the Taylor collection. Only the fear of creating confusion 

 prevents my giving a fresh name to one of them. F. corneus 

 of author's is Murex lignarius of Linna?us. 



122. gracilis, f. 94, Costa. — Testa quam F. Islandicus 

 angustior, tenuiter striata, apice regulariter conica. — Nar- 

 rower than F. Islandica, the apex gradually sloped. 



123. propinqtjus, f. 95, 151, 154, 155, Alder. — Testa quam 

 Islandica gracilior, anfractibus rectilateralibus valide sulcatis, 

 apice obtuso, ad suturam humerosis, submarnillato, rotundo. 

 - — It is, like F. Jeffreysianus, more flat-sided than F. gracilis 

 and shouldered at the suture. The third apical whorl is 

 round and wide. Figs. 151 and 155 represent F. attenuatus 

 and F. turritus of Jeffreys respectively, and probably F. 

 lachesis, Morch, f. 154, as represented in our copied figure, 

 may be a variety of the same. 



1 24. jeffreysianus, f. 96, Crosse, Lamarck. — Testa quam 

 F. Islandicus multo brevior, ventricosa, anfractibus ad 

 suturam humerosis, ad latera rectiusculis, apice obtuse conjeo. 

 — Were it not for the shorter proportions of this species 1 

 should not be inclined to consider the slight apical difference 

 between it and F. propinquus of sufficient importance to 

 justify separation. 



125. pyghjeus, f. 153, Gould. — Testa parva robusta, dense 

 lirata, quam F. gracilis magis ovata, anfractibus 6 brevibus, 

 rotundis apice conico, ultimo anfractu brevi, apertura pyri- 

 formi parva, canali angusto, tortuo ; epidermide serrato. — 

 A much more compact little shell than the young of F. gra- 

 cilis would be, although, like that species, it has a conical 

 apex. The whorls are short, robust, rounded, and not sloped 

 or shouldered. Mr. Bell kindly lent me the specimen figured, 

 which I cannot refer to either of the preceding species. 



126. latericeus, f. 102, 152, Moller. — Testa angusta, alba 

 pyramidata, anfractibus superioribus cancellatis, ultimo spi- 



