DESCRIPTIONS OF THE BOGNOR FOSSILS. 227 
at present that I. tuberculatum (Min. Con. f. 97) is the same-species as I. trochi- 
forme. 
The two species, Globulus patulus and G. sigaretinus, have been accidentally 
left in this genus: they should be referred to Ampullina. 
Natica? microstoma. (Tab. XIV. fig. 24.) 
Spec. Cuar.—Shell subglobose, pointed, smooth ; spire large, prominent, the 
whorls convex, squarish ; umbilicus narrow, deep; aperture semicircular, only 
two-thirds the length of the shell. 
The specimen is not perfect enough to afford a complete description ; the 
small size of the last whorl distinguishes it. Rare. 
Acteon simulatus ? 
The specimens which I refer to this name are imperfect casts, but in them the 
spire seems to be longer than in the Barton shells, and the shells are also smaller. 
Solarium bistriatum. (Tab. XIV. fig. 20.) 
This is one of the most beautiful and most perfect of the analogues of the 
Calcaire grossier we know. It is withal a rare shell and only lately discovered. 
Littorina sulcata. (Tab. XIV. fig. 23.) 
Specimen small and imperfect, but it agrees well with young shells from 
Barton. 
Turritella scalarioides. (Tab. XV. fig. 10.) 
Spec. Cuar.—Turrited, corded ; whorls six or seven, convex, with ten thin 
ridges or threads around each, of which the middle ones are Jargest ; base defined 
by a sharp ridge ornamented with many fine threads or striz ; lines of growth 
sharp ; aperture nearly round. 
Twice as long as wide. 
First discovered by Mr. Wetherell at Highgate, where it is rare. 
Fusus undosus. (Tab. VII. fig. 39.) 
This species is fully described as a Bracklesham shell. It appears to vary in 
the elevation of the cost, which are often, especially on the last-formed whorl, 
only slight waves ; some specimens which show no other difference have them 
very strong. 
