Geological Society of London. 85 



the beds. The num'ber of bivalves bored by carnivorous moUusks was remarkable, as 

 was also the absence of Fectunculus. 



Mr. Gwyn Jeffreys observed on the habits of Ungula, which had been by some 

 regarded as an annelid, and not as a mollusk. It afforded a curious instance of the 

 persistence of species, as there was no distinction that could be established between 

 those of the Crag and of Silurian times. It lived at the present time between high- 

 and low- water mark, and the Fanopcea at a slightly lower level, and probably had 

 done so in Tertiary times. 



Mr. Evans inquired whether the upper gravel, like that on the shore of 

 Southampton "Water, contained any flint implements. 



Mr. Meyer replied that he had not examined the gravels with that view. 



2. " Note on some new Crustaceans from tiie Lower Eocene of 

 Portsmouth, collected by C. J. A. Meyer, Esq., F.G.S." By Henry 

 Woodward, Esq., F.G.S., F.Z.S. 



Mr. Woodward drew attention to tlie occurrence in the fossil state 

 of pelagic forms of Crustacea armed with long spines on the latero- 

 anterior angles of the carapace. 



Two Eocene forms had been described by Dr. Alphonse Milne- 

 Edwards, namely, Enoplonotus armatus, and Psammocarcinus Heri- 

 cartii. 



Two new forms, differing generically from the above, but pro- 

 bably referable to the same family (the Portunidoe), were described, 

 under the names of Bhachisoma (gen. nov.), B. ecMnata, and B. bi- 

 spinosa. 



A third form, belonging to the GorystidcB, was then noticed. This 

 family, represented in the fossil state by the genus PalcBocorystes, is 

 well known in the Gault and Upper Greensand of Folkestone and 

 Cambridge, one species ranging up as high as the Maestricht beds. 

 The occurrence of PalcBoeorystes in the Lower Eocene is of great 

 interest. Mr. Woodward named this new Palceocorystes, P. glabra. 



3. " On the Chalk of the Cliffs from Seaford to Eastbourne, 

 Sussex." By W. Whitaker, Esq., B.A., F.G.S. 



The author compared the chalk of the Sussex coast with that of 

 the Kentish coast, and stated that it consisted of the following divi- 

 sions in descending order : — 



1. Chalk with flints of great thickness. 



2. Chalk with flints and nodular layers, weathering rough. 



3. Chalk without flints, but with nodular layers, weathering 'rough. 



4. Thick-bedded massive chalk without flints. 



5. More thinly-bedded chalk without flints, but with marly beds. 



6. Chalk-marl, 50 or 60 feet. 



The highest of these divisions stretches as far eastwards as Beachy 

 Head, and forms the whole of the cliffs to within a short distance of 

 that point. 



4. " On the Chalk of the southern part of Dorset and Devon." 

 By W. Whitaker, Esq., B.A., F.G.S. 



The divisions of the Chalk were traced by the author westward 

 from cliffs on the north side of Swanage Bay to beyond Beer Head 

 in Devonshire. At first the succession of the beds was shown to be 

 as in the Isle of Wight, namely : — 



1. Chalk with flints, very thick. 4. Chalk without flints. 



2. Chalk with few flints. 5. Chalk-marl. 



3. Chalk-rock, very thinly developed. 



