Reports and Proceedings — Geological Societg of London. 281 



•him that the emenfled form ' Vivipara ' was more appropriate than 

 ' Viviparus,' seeing that so far as known at present male animals do not 

 produce young, and that anyhow Viviparus vivipara could not be right. 

 There are unfortunately numerous nomenclatural inconsistencies 

 to puzzle the student, that should have been eliminated. The worst 

 of these is the treatment meted out to the quondam genus Ammonites. 

 Mr. Jukes-Browne has evidently struggled hard to cope with the 

 •correct modern divisions, but he has been worsted in the conflict. 

 He starts bravely enough in the middle of p. 334, where the modern 

 (more or less) generic names are employed ; but from the bottom of 

 that page, and for some way further on, these same names are treated 

 as subgeneric and placed in parentheses after ' Am.' Between p. 340 

 and p. 350, and beneath all the cuts of the Jui'assic forms, however, 

 'Ammonites' alone appears; thenceforward for some pages the sub- 

 generic method is again followed. Finally, the strain becomes too 

 gi'eat, all three styles are employed indiscriminately, with the result 

 that the same species occurs under different forms of names at short 

 intervals, so that, for example, we read of 'Am. {Douvilleiceras) 

 mammillatus ' on p. 427, of ' Douvilleiceras mammillatus ' on p. 429, 

 and of ' Am. mammillatus ' on p. 430. Poor student ! 



B. B. W. 



I^:E]Fo:E^T3 .a.3^id :F'i^oG:E]:H]IDI3^G-S- 



Geologioal Society of London. 



I.— March 2Gth, 1902.— Professor Charles Lapworth, LL.D., F.R.S., 

 President, in the Chair. The following communications were 

 read : — 



1. "On. a remarkable Inlier among the Jurassic Rocks of Suther- 

 land, and its Bearing on the Origin of the Breccia-Beds." By the 

 Eev. John Frederick Blake, M.A., F.O.S. 



On the coast of Sutherland due south of Port Gower is seen 

 ■on the scars at low-water a long rocky crest of Old Red Sandstone, 

 with its flaggy beds dipping at a high angle. It is of considerable 

 height, and is surrounded by nearly horizontal Jurassic beds con- 

 taining large blocks of rocks similar to those of the crest, irregularly 

 placed. The size, outline, and relation to the surrounding rocks 

 show that this cannot be a transported block, but must have been 

 part of, or directly derived from, a neighbouring coast — like the 

 modern sea-stacks of the present coast at Duncansby. 



The relations of the Jurassic rocks to the Old Red Sandstone are 

 ^een in the Gartymore Burn. The fragments of the latter contained 

 in beds of the former become more numerous as the junction is 

 approached, and ultimately form the whole mass — as would happen 

 lin the ease of a cliff-talus. It is concluded that the breccia-beds 

 may in part have originated on the spot. 



The distribution of the breccia-beds in the Jurassic Series is then 

 considered in detail. Three horizons can be traced in this series, 



