40 SECOND SUPPLEMENT TO THE CRAG MOLLUSCA. 



me by Mr. Reeve ; but all of them were in a more or less mutilated condition. One 

 of the best preserved of them is represented in the accompanying 

 zincograph. 



The shell much resembles the figure of Aetceon Itsvisulcatus of 

 Sandberger (Nos. 4 and 5 of Taf. xxxiii of Dr. Speyer's ' Cassel 

 Tert. Conch.'), a species of the Upper and Middle Oligocene of 

 Germany ■ but as neither the apex nor the mouth of any of the 

 ^ Bramerton specimens are perfect, I clo not feel sufficient confidence 

 in their identity to refer them to Sandberger's species, and have, 

 , „, , therefore, given them under the above name provisionally. The 



Odostomia denvata, S. Wood, ' ° tr j 



enlarged l 2 . shading in the figure being effected by coarse lines gives the 



erroneous idea of the shell being covered with fine vertical lines. It, however, possesses 

 only the strong horizontal or spiral striae shown in the figure. 



Besides the above there was a single specimen of an Odostomia, which I am unable 

 to refer to any Crag species or to any living British form ; but it is too much worn for 

 me to venture to describe it as a new species. It is about an eighth of an inch in length, 

 and in its present state is free from striae. It is probably, like the foregoing, a derivative 

 from some older formation. There were also among the specimens fragments of the 

 hinge portion of a small bivalve resembling the figure of Siliquaria parva, Speyer ('Ober. 

 Oligocan Tert. Detmold,' p. 33, Taf. iv, fig. 2), but they are too imperfect for correct 

 recognition. There was also among them an imperfect specimen of a minute Aetceon, 

 which, I think, may be perhaps A. Philippii, Koch and Wiechmann (Die oberoligoc, Eau. 

 des Sternberger Gesteins in Meckl.,' Abth. s. 7, Taf. i, fig. 3 a — c, represented by Speyer in 

 Taf. xxxiv. fig. 1 — 3 of his work on the ' Cassel Tertiaries.') It resembles that species in 

 form ; and possessing four complete whorls, though only one eighth of an inch in length, 

 it can hardly be the young of either of the Crag species Noce and tornatilis. As, however, 

 I could not under a magnifyer detect the peculiar pitted marks which separate the 

 striations in A. PMUippii, I have not ventured so to assign it. Among the specimens 

 there was also one of Bissoa proximo,, Alder, which, though it has lost the upper whorls, 

 is otherwise well preserved, and on the authority of it I have introduced that name into 

 the Fluvio-marine Crag column of the synoptical list. These specimens also will be 

 preserved in the Norwich Museum. 



