10 SECOND SUPPLEMENT TO THE CRAG MOLLUSCA. 



This shell was noticed by me as from the Coralline Crag in the ' Quart. Jour/ of 

 the Geol. Soc. above referred to, and I have now the opportunity of figuring the 

 specimens. I have also since then received two specimens of the typical oligocene form 

 from Dr. Nyst, from the locality of Baesele, near Boom (Rupelien) ; and I think the 

 British Crag Fossil may safely be referred to it. The only difference which I can detect 

 is that the inside of the outer lip in one of the Belgian specimens is denticulated, while 

 that of the Crag shell is not. The other specimen sent to me by Dr. Nyst, however, 

 does not present this character ; nor so far as I can see do specimens sent me by Dr. 

 Von Konen, from the German Oligocene of Sternberger Gastein, nor by some speci- 

 mens from the Oligocene of Rupelmonde, in Belgium, sent me by M. Rutot ; the artist 

 has given a representation to my specimen which might be mistaken for denticulations 

 on the inside of the outer lip, but there are none, and the ribs are not so wide and 

 coarse as he has shown them. I have had the only two specimens (which I believe have 

 as yet been found) figured, one of which is more elongated than the other, and 

 they appear to correspond as well with the two figures given by Dr. Von Konen 

 as with the oligocene specimens to which I have referred. Our shell has eight, 

 somewhat rounded ribs or costse upon the last volution, the spiral striae resemble 

 those upon the Baesele shell, and the caudal termination is long and slightly tvtisted as in 

 the one before mentioned ;. the apex is obtuse, with the first volution apparently smooth, 

 but the volution not being perfect this cannot positively be affirmed. This shell also very 

 strongly resembles Fusus crispus, and a worn specimen was figured by me in my first 

 Suppl. under that name, with a note doubting the correctness of the reference (p. 29, 

 Tab. II, fig. 10). Two specimens with the name of F. crispus, Broc, and the syn. F. Bothi, 

 and the locality Bekken (miocene) attached, I have, by the kindness of M. Bosquet, long 

 possessed, and these show prominent and sharp spiral striae, with two small ridges upon 

 the columella ; but these ridges are not visible in the only two worn specimens from the 

 Crag, on which I made the reference in p. 29 of my Suppl. A fine specimen of F. 

 crispus, Borson, sent me by Dr. Von Konen, from the Miocene of Langenfelde near 

 Hamburg, has the inner part of the outer lip denticulated, but has no folds on the 

 columella ; in other respects it agrees with specimens sent me from the bed at Kiel and 

 Edeghem in Belgium, under the name F. sexcostatus. A specimen of F. seoccostatus 

 from the Miocene of Dingden near Wesel, kindly sent me by Dr. Konen is destitute of 

 these folds on the columella, and were it not that the three upper whorls are smooth 

 (which is not the case with the Crag specimens), would equally agree with the more 

 elongated form of the two now given specimens figured above. On the other hand, 

 specimens sent me by M. Rutot, under the name of F. sexcostatus, from the so-called 

 Miocene of Kiel and Edeghem in Belgium, with the apices perfect, are destitute of these 

 three unornaniented whorls ; but one of them has two folds on the columella ; another 

 (the largest) has but one, while another, the smallest, has none at all. Not one of these 

 three last-mentioned specimens has the inside of the outer lip denticulated, and the 



