OF THE PTJEBECK FORMATION. 323 



List of Specimens &c. (continued). 

 Nos. of the speci- 

 mens in T. R. J.'s 



Collection. Locality. Collector or Museum. Species. 



§ 3. Bacon Hole. 



^'%ecimen Xb| (Catal. Foss. M.P. G. 1865, p. 254). I fj^mfata 

 Bacon Hole. Thin Cypridiferous limestone | i^qundnem. 



British Museum, l^ ^ 



§ 4. Ridgiuay. 



Eridgway. With Paludina. M. P. G-. || punctata. 



Cypridea punctata is notably the most abundant species in the Upper- 

 Purbeck Series. 



II. Ostracoda from the Middle- Purhech Beds. 



I. DOESET. 



§ 1. Durlston Bay. 



59 & 118. Near Swanage. Specimens chipped off a large block of'\ 

 Purbeck Limestone (bearing vermiform markings and 

 two large pachydactylous trifid footmarks), which for- | 

 merly stood in the Hall of the Geological Society's \fasciculata *. 

 Apartments in Somerset House, before the removal I 

 to Burlington House. Another such block is in Corfe- | 

 Castle Museum. ) 



" The bed with trifid marks comes in the ' Corbula-beds ' of the 

 Middle Purbeck at Durlston Bay [nos. 24-29 of J. H. Austen's 

 section, 1852]. It is the ' Toad's-eye Limestone ' marked ' No. 68 ' 

 in the section published in the new edition of Mr. Damon's book, 

 1884, p. 203. This ' Toad's-eye Limestone ' is a variable bed, 

 splitting up into three or four layers ; but sometimes these are not 

 distinct, and it then simply has ' rotten ' veins of indurated marl." — 

 H. B. Woodward; Letter, 26th October, 1884. 



74. " Durlston Bay. Top of the Cinder-bed." t fasciculata. 



31. " Lower beds of Middle Purbeck. Cj^ris-hmestone."... fasciculata. 

 44. Hard, blue-hearted, thin limestone or compact Cypridi- f ventrosa, and 

 ferous shell-grit. " Below theEeptile Bed. \ \ var. globosa. 



J. Morris, Nov. 21, 1873." [ Bristovii. 



{Shale. Cypridiferal shale, largely composed of broken"! 

 and perfect valves. " Lower bed of Middle Purbeck." [punctata. 

 " Below Beckles's bed " (no. 93 of Austen's list, p. | Bristovii. 

 13, called a " dirt-bed," but really a lake-bottom). J 

 Durlston Bay. Thin crystalline limestone, composed of 1 



Cj'prids, and showing them freely on the weathered > fascictdata. 

 flaking of the surface. M. P. Gr., Xsf . J 



Durlston Bay. M. P. G-., Xb^. punctata. 



* This name is used here for convenience, it being well known and indicating the 

 more pronounced and common modification of Cypridea granulosa (Sow.). 



t See ' Catal. Eock-specimens, M. P. G.' 1862, p. 142. 



J There are several reptiliferous beds ; if the bed worked by Mr. S. H. Beckles be 

 intended, it is no. 93 of the Eev. J. H. Austen's list, 1852, at the base of the Middle 

 Purbecks. 



