58 SUPPLEMENT TO THE CRAG MOLLUSCA. 



Scalaria Turtoni, Turton. Supplement, Tab. IV, fig. 7. 



Turbo Turtonis, Turt. Conch. Diet., p. 208, fig. 97, 1819. 



Scalaria Turtonis, Forb. and Hani. Brit. Moll., vol. iii, p. 204, pi. lxx, figs. 1, 2. 



Localities. Chillesford Bed, Sudbourn Church Walks, and Beccles Waterworks. 



The above figure represents a specimen obtained by Mr. A. Bell from Sudbourn 

 Church Walks, and I have very recently found another specimen at the same locality. M. 

 Weinkauff (' Conch, des Mittel,' vol. ii, p. 234) gives two varieties of this species. One 

 he calls gracillissima. Our fossil is the less elongated one, and corresponds with the 

 variety from the Irish seas ; it has a deep suture, and the whorls are nearly circular. 

 Scalaria trinacria, Phil., vol. ii, p. 145, looks like, and is probably a short variety of 

 this species. Mr. Crowfoot sent me a fragment obtained from the Waterworks Well at 

 Beccles, which pierced probably the Chillesford bed ; and this fragment I think may be 

 referred to the above-named species. Eig. 5, Tab. IV, represents the portion of a shell 

 also obtained by Mr. Bell from the bed at Sudbourn Church Walks, which I believe is a 

 variety of the above species. It has a faint spiral ridge at the base of the volution, similar to 

 that upon Sc. pseudo-scalaris, Risso. I have therefore called it var. pseudo-Turtoni. In 

 the 'Ann. and Nat. Mag. Hist.,' September, 1870, Mr. Bell gives the name of Sc. pseudo- 

 scalaris from the same deposit. I have not seen that species as a British fossil ; probably 

 the specimen I have figured as var. pseudo- Turtoni may be that on which he has made 

 this reference. Scalaria Jlmbriosa is given in the list of Mr. Prestwich's paper as from 

 the Red Crag of Woodbridge. This is probably through some mistake. Scalaria com- 

 munis is also there given from Waldringfield, but I have seen nothing answering to this 

 species or I would have had it figured. 



Scalaria Trevelyana, Leach. Crag Moll., vol. i, p. 94, Tab. VIII, fig. 20, and 



Supplement Tab. IV, fig. 6. 



Localities. Red Crag, Sutton. Eluvio-marine Crag, Bramerton. Chillesford Bed, 

 Aldeby. Middle Glacial, Hopton and Billockby. 



I have here given a large representation of a small specimen from Aldeby, found by 

 Messrs. Crowfoot and Dowson. This young specimen has the three upper volutions free 

 from ribs of any kind. The specimen I previously figured has lost the upper half in 

 which this character is shown. I have not met with this species from any other locality 

 of the Chillesford bed, and it is rare in the Fluvio-marine Crag. A fragment consisting 

 of a single whorl has occurred in the Middle Glacial of Hopton, and another rather more 

 complete at Billockby. 



