122 Geological Society. 



for believing that a slight unconformity occurs in the Upper Lias r 

 so that the lower part of the jurensis-zone is absent, and not its 

 upper part as has been elsewhere inferred. 



2. i Contributions to the Stratigraphy and Palaeontology of the 

 (rlobigerina-limestones of the Maltese Islands.' By J. H. Cooke, 

 Esq., F.L.S., F.G.S. 



A bibliography of the Globigerina-Mme&tonQS is followed by some 

 remarks on the physical features and general distribution of the 

 strata. The limestones are divided into nine subdivisions, lettered A 

 to I, the former being uppermost. Four seams of phosphatic nodules 

 form the subdivisions B, D, G, and I, and local nodule-bands also 

 occur in E. The subdivision G serves as a line of demarcation 

 between the Langhian Series (Miocene) and the Aquitanian 

 (Oligocene). Details of the lithological and palaeontological cha- 

 racters of the various subdivisions are given, and the author 

 concludes that I and the lower part of H were laid down on a 

 sinking sea-floor, in about 300 fathoms of water ; that the upper 

 part of H and G, F, E, D, composed to a large extent of Glohigerina 

 and other pelagic organisms, were probably deposited in about 

 1000 fathoms ; while C, B, and A were probably laid down, like I 

 and the lower part of H, in about 300 fathoms of water. 



3. w On the Geology of the Neighbourhood of Carmarthen.' By 

 Miss Margaret C. Crosfield and Miss Ethel G. Skeat. 



The area described lies approximately within a 4-mile radius of 

 Carmarthen. The beds of the district have been subjected to com- 

 plicated foldings, amongst which an earlier set, giving rise to a 

 number of small anticlines with north-and-south axes, and a later 

 more extensive set, due to the series of earth-movements which pro- 

 duced the great Condrusian ridge, producing anticlines and synclines 

 having a general east-and-west trend, can be made out. The rocks 

 forming the subject of the present paper occur in one limb of a 

 complex anticline produced during the latter set of movements. In 

 this limb beds of the following ages occur : — Tremadoc Slates, 

 Lower and Upper Arenig, Llanvirn, Llandeilo, and Bala, These 

 beds are described in detail. A regular succession of strata from 

 Tremadoc Slates to Dicranograptus-sh&les is found, while the Bala 

 beds of Mount Pleasant abut on Arenig strata, and the reason for 

 this irregularity has not yet been decided by the authors. The beds 

 are compared with those of other areas. The Tremadoc Slates are 

 equivalents of Stage 3 a of the Christiania district ; the Lower Arenig 

 Beds with Phyllograptus angustifolius, and the Upper Arenig with 

 Didymograptus nitidus, &c. resemble those of other British areas ; 

 the Llanvirn Beds contain Didymograptus hifidus and other fossils ; 

 the Didymograptus Murchisoni-heds are well known elsewhere. The 

 Llandeilo Limestone is probably represented by sandy beds with 

 Asaphus tyr annus; and the Dicranograjytus-shales are like those of 

 the Haverfordwest region. The Bala Beds of Mount Pleasant 



