PIIVLOGENY OF FUSUS AND ITS ALLIES. 1 23 



Locality: Brockenhurst, Hants Co., England (J\I. C. Z. 27794). 

 Horizon: Lower Oligoccne Brockenhurst beds. 



CLAVILITHES EGREGIUS (Beyrich). 



(Tlatc XIV, fig. 2.) 

 1865. Fiisus longccvus van cgrcgius (Beyrich) von Koenen, Zeitsch. der Deulsch. 



Geolog. Gesellsch., Bd. 17, seite 479. 

 1889. FiisHS (Clavella) egrcgins von Koenen, Norddeutsches Unteroligocan, pt. 



I, p. 206. 

 (See further C. egrcgins Beyrich below.) 



The species of ribless Clavilithes found in the Brockenhurst beds 

 was identified by von Koenen with Beyrich's Fnsus cgrcgius. While 

 differing in some minor respects from the North German species, the 

 two may, nevertheless, be considered specificially identical. 



The protoconch is papillose and consists of several whorls. The 

 succeeding whorls of the conch are at first globular, with well devel- 

 oped spirals, after which they become flattened in their upper portion, 

 which instead of being parallel to the axis of the shell slopes outward 

 at a strong angle. The lower part of the whorl is rounded, but that 

 portion is covered by the succeeding whorl. The last whorl is smooth, 

 the sides nearly parallel to the axis, and the suture with a very narrow 

 shelf. The lip of the figured specimen flares out suddenly. 



Locality: Brockenhurst, Hants Co., England (M. C. Z. 27793). 



Horizon: Lower Oligoccne (von Koenen), Brockenhurst beds. 



CLAVILITHES SOLANDERI sp. nov. 



(Plate XIV, figs. 5 and 6; Plate XV, figs, i and 2.) 



1766. Murcx longcrviis Solander, Brander Foss. Hants., pi. VIII, fig. 93- Not M. 



longccvus Solander, ibid., pi. II, fig. 40, and pi. VI, fig. 73- 

 1812. Fusus longccvus Sowerby, Min. Conch., vol. i, p. 141, tab. 63, fig. i. 

 1845. Fusus longccvus Desor, Sowerby's Mineral. Conch., p. 99, pi. 46, fig. i. 



This species is distinct from all the French species which have been 

 examined, though it is genetically related to them. It is larger, coarser 

 and more robust than any of the Paris Basin species. So far as known 

 it is confined to the liritish Eocene. 



The protoconch is stout, its terminal whorls flattened so as to pro- 

 duce a trochus-shaped apex. It is papillose and consists of less than 

 three volutions. No ribs have been observed. (See further description 

 under C dcforniis.) 



The conch begins with a whorl somewhat larger than those of the 

 protoconch antl marked only by sharp and rather distant spirals. After 

 this the whorls are thrown into transverse undulations, which in none 

 of the specimens seen assume a true rib character. This continues for 

 about a volution and a half, the whorls being nnuuled, and then, by a 

 fairly sudden transition, the whorls become subconical, smooth and with 



