XXXV111. 



containing intercolated marine bands ; of which one, locally known from 

 its dark colour as the cinder bed, is almost entirely composed of small 

 oyster shells. A thin band which divides the cinder bed into two parts 

 contains Hemicidaris Purbeckensis, Forbes, the only Echinoderm which 

 has yet been discovered in the Purbeck beds. The interesting remains 

 of turtles which grace the shelves of our National Museum are here 

 found, but the most interesting of all are the mammalian remains, 

 consisting of Marsupials, which Sir Kichard Owen found to belong to n o 

 less than 25 species. This mammiliferous bed contains also two species 

 of dwarf crocodiles. The remains of fish are widely dispersed, consisting 

 chiefly of scales, teeth, and palates of Aspidorhyncus fisheri, Lepidotus 

 Histionotus angularus, and Pholidophorus ornatus may be seen in the 

 County Museum. The Wealden beds at Lulworth occupy a nearly 

 vertical position, and are represented by alternations of red and purple 

 coloured clays, white and yellow sands, and occasional beds of quartzose 

 sandstone or grit, with lignite at the base. The quartz ose sandstone is 

 probably derived from the waste of the Palaeozoic rocks of Devonshire. 

 At the top of the Wealden there are beds of a fluvio marine character 

 showing similar conditions to the Purbecks alternations of freshwater } 

 brackish water, and marine, indicating a return to marine conditions. 

 To these the name of Punfield beds has been given by Mr. Judd from 

 Punfield Cove in Swanage Bay, where they are well developed. The 

 remarkable degrees of inclination which the chalk strata presents on thig 

 coast deserve notice. They vary from horizontal to vertical, and are in 

 some instances curiously contorted. At Swanage and Warbarrow Bays 

 the curved strata and the vertical meet at a line of fault. In Mewps 

 Bay, which the members will see on their way to Arish Mill, are 

 exhibited along the shore the Upper Chalk, the Lower Chalk, Chalk 

 Marl, and Upper Greensand. These beds are not so well seen at 

 Lulworth Cove owing to the fallen state of the cliff. 



Subsequently the party crossed the Cove in boats and proceeded along 

 the edge of the cliff to view the Fossil Forest. From this point they 

 crossed some fields and then began the ascent by the narrow coastguard 

 path of Bindon-hill, from the summit of which a magnificent view of the 

 coast line was obtained. Arriving at Arrish Mill Gap a halt of about 

 half-an-hour was made for luncheon, and three new members were 

 elected. From this point Lulworth Castle was reached shortly before 

 three p.m. Here they were welcomed by Mr. H. Weld Blundell, the 

 Misses Weld, and Mr. and Mrs. Walmesley. Here Mr. Weld Blundell 

 read a paper on the history of Lulworth Castle and some of the objects 

 of interest which it contains, (This paper will be found at pp. 140-143. ) 



