156 PROF. T. KTJPEKT JONES ON THE [May 1 894, 



12. On the Rustic and some Liassic Ostracoda of Britain. By 

 Prof. T. Rupert Jones, F.R.S., E.G.S. (Read January 10th, 

 1894.) 



[Plate IX.] 



Contents. Page 



I. Published Observations in Chronological Order 156 



II. Named Specimens 159 



III. Description of the Species 162 



I. Published Observations in Chronological Order. 



The occurrence of small Osfcracoda in the Rhgetic strata of 

 England has been known for about half a century, chiefly owing to 

 the researches of the Rev. P. B. Brodie, F.G.S., who discovered 

 them in the sections exposed at Wainlode, Westbury, Aust Passage, 

 and elsewhere. 



1842-1845. — The Wainlode section is on the south side of the 

 Severn, about halfway between Tewkesbury and Gloucester, and 

 3 miles W.S.W. from Coomb Hill. It was briefly described by 

 H. E. Strickland, 1 and more fully by the Rev. P. B. Brodie. 2 Since 

 then the Geological Surveyors and others have studied it in further 

 detail. 3 



This section shows : — 



1, 2, 3. Black clay, limestone, and shale of the Lower Lias. 



4 [Rhaetic *]. Insect-bed or Monotis-bed, containing " Cypris, 

 apparently identical with that which marks the yellow limestone 

 (No. 6) below." (' Eossil Insects,' etc., p. 59.) 



5. Clay. 



6. " Hard, yellow, nodular limestone, with small shells like 

 Cyclas, a species of Unio, Plants (Naiades), Cypris, and very rarely 

 scales of Eish." (Ibid.) 



7-14. Clays, shales, and Bone-bed. 



" Mr. Strickland has found the yellow C?/pm-limestone with 

 Cyclas (?), the Pecten- and Bone-beds ... at Dunhamstead, on 

 the line of the Gloucester -and- Birmingham Railway, near the 

 Droitwich Station " (' Eossil Insects,' etc., p. 72) : and at Evesham 

 " are traces of the Ostrea-bed [Lias] above and of the Cypris-bed 

 and Plant-bed below " (ibid.). 



Among the specimens kindly lent me by the Rev. P. B. Brodie, 

 one piece of the ' Cyjiris-bed,' from the Wainlode Cliff, is a hard, 

 6andy limestone, containing a ' Pteromya.' 



1 Proc. Geol. Soc. vol. iii. part ii. (1842) p. 586 ; ibid. vol. iv. part i. (1843) 

 p. 18. 



2 Proc. Geol. Soc. vol. iv. part i. (1843) pp. 15, 16 ; and 'A History of the 

 Fossil Insects in the Secondary Rocks of England,' 1845, pp. 58, 59. 



3 See H. B. Woodward's ' Geology of England and Wales,' 2nd edit. 1887, 

 pp. 242-251. 



4 According to the arrangement adopted by the Geological Survey. 



