546 Dr. C. Struckmann — The Jura of San over and England. 



Appendix F. — List of Mollusca obtained from the Shelly ' Basement ' 

 Boulder-Clat and included masses at Dimlington. 



1 Pecten Islandicus. 



2 3Tytilus modiolus. 



3 Nucula CobholdicB. 



4 ,, tenuis. 



5 Leda pernula. 



6 Cardium edide. 



7 Cahdium Grcenlandicum. 



8 Cyprina Islandica. 



9 Asiarte depressa. 

 *10 „ horealis ; and var. 

 *11 „ sulcata, var. elUptica. 

 *12 ,, compressa. 

 *13 Tellina halthica. 



14 ,, calcaria. 

 *15 Mactra solida, var. elliptica. 



As in the Bridlington list, the asterisk denotes that the shell has 

 been obtained unbroken. The two species in capitals have not 

 been found at Bridlington. 



Dr. J. Gwyn Jeffreys remarks that he considers all these shells 

 "comparatively shallow water species, from 2 to 10 fathoms. They 

 are unmistakeably arctic." 



Appendix G. — The following are the additions in the above lists to 

 the Bridlington Molluscan Fauna as contained in Appendix A. 



16 Thracia pubescens. 



17 Mya truncata. 

 *18 Saxicava rugosa. 



19 ,, Norvegica. 



*20 Pholas crispata. 

 *21 Dentalium entale. 



22 ,, striolatum. 



23 Turritella crof^a. 

 *24 Natica affinis. 



25 Fusus dcspectus. 



26 ,, Spitzhergensis. 

 *27 Pleurotoma pyramidalis. 

 Also Balanus Hameri. 



,, crenatus. 



1 Pecten opercularis. Bridlington. 



2 Leda tenuis. Bridlington. 



3 Leda lenticula. Bridlington. 



4 Cardium Grcenlandicum. Dimling- 



ton. 



5 Thracia pubescens. Dimlington. 



6 3Iya truncata, var. Uddevallensis, 



Bridlington. 



7 Pissoa Wyville-Thomsoni. Bridling- 



ton. 



8 Menestho albula. Bridlington. 



I have great pleasure in thanking Dr. J. Gwyn Jeffrej^s for his 

 kindness in examining for me the great number of shells, chiefly 

 fragmentary, from which these lists are compiled ; and also my 

 friend Mr. W. Headley, of Bridlington Quay, for his valuable 

 assistance in procuring specimens. 



III. — On the Parallelism of the Hanoverian and English 

 Upper Jurassic Formations. By C. Struckmann. 



Communicated by the Translator, W. S. Dallas, F.L.S. ; 

 Assistant- Secretary, Geological Society of London. 



[M. C. Struckmann, who has already published an elaborate treatise 

 on the Upper Jura of the neighbourhood of Planover, has com- 

 municated to the "Neues Jahrbnch fiir Mineralngie, etc." (1881, 

 Bd. 11. pp. 77 — 102), a comparison, founded mainly upon palason- 

 tological evidence, between the Upper Jurassic deposits of that 

 district and England, and a statement of the conclusions at which 

 he arrives will be interesting to many English geologists. 



He commences with an abstract of the authorities on which he 

 founds his knowledge of the English deposits, referring especially 



