154 T. Davichon — Tipper Silurian Brachiopoda. 



have described the mode in Avhich the spirals were connected. 

 After many inquiries in diiferent directions, Prof. Zittel informed 

 me that he believed there existed in the Imperial Museum of Vienna 

 some specimens that might help in this investigation, and ac- 

 cordingly ray old and valued friend Prof. Suess at once kindly 

 obtained for my inspection the important specimen, Fig. 20, and in 

 which are seen, not only the attachments of the principal stems of 

 the spirals to the hinge-plate, but likewise their connection by the 

 means of a curved bridge-like process, and which connects them at 

 about half their length — small portions of the spirals themselves 

 being also visible. 



We are likewise indebted to Mr. A. Champernowne of Dartington 

 Hall, Totness, not only for the discovery of the first British 

 specimen of the genus, but also for finding a specimen showing 

 the cardinal process, which in Uncites gryphus is heart-shaped and 

 strongly developed. This valuable specimen was presented to the 

 Albert Memorial Museum, Exeter, by its discoverer. I am now, 

 therefore, for the first time able to offer a correct restoration of the 

 interior of the dorsal valve (woodcut. Fig. 21). 



Mr. Champernowne informs me that in addition to the locality, 

 Orchard Quarry, Dartington, Mr. P. Vicary has obtained two 

 specimens from the Chudleigh Limestone in Devonshire. We still 

 remain unacquainted with the shape and position of the muscular 

 impressions, but these will, in all probability, be some day 

 discovered. 



EXPLANATION OF PLATE V. 



Fig. 1-2. Glassia obovata, Sow. sp. 

 ,, 3-4. elongata, Dav. The interiors of the valves or spirals are seen as 



a transparency. 

 ,, 5. Meristella ? Mawei, Dav. 



,, 6. Waldheimia? Glassei, 'Da.y. 



,, 7-8. • Mawei, Dav. 



,, 9. Rhynchonella Dayi, h&Y. 



,, 10-11. cuneata, Dalman. 10 shows two short curved lamellBe 



only, as developed by Eev. N. Glass. 11 is taken from Prof. Hall's 



restored figure in p. 166 of 28th Annual Eeport of the New York 



Museum of Natural History. 

 ,, 12. Orthis elegantnlina, Dav. 

 ,, 13. Streptis Grayi, Dav. 



Note. — In the first part of this paper, published in the January 

 Number, I stated that Mr. Whitfield " had been engaged in develop- 

 ing the spirals and their connections in the Palseozoic Brachiopoda, 

 but only in American specimens, and principally in siliceous shells 

 or in shells possessing a hard limestone matrix." I also stated that 

 "Mr. Glass's operations had been confined almost entirely to English 

 specimens, and to those English specimens only which were partly 

 or wholly filled with spar." In my Carboniferous Supplement, 

 published at the commencement of last year, I also stated that 

 "some finely worked out specimens of American Palgeozoic Spirifers, 

 and other genera, have been described and illustrated by Prof. Hall 

 and Mr. Whitfield; but in this case the results were obtained 



