272 Prof. T. B. Jones and C. D. Sherbom — Jurassic Microzoa. 



genera, in descending order of strata, and deferring the specific 

 nomenclature for a subsequent opportunity. 



1. " Kimmei-idge Clay, near Coulston, Wilts." H. B. W. 



A mottled (blue and yellow-brown) clay, very stiff and greasy to 

 the touch. Eesiduum, after washing, a very little, fine, subangular 

 sand, with minute woody fibres. Microzoa rare and very small, of 

 a brown colour and with a sandy appearance. The Foraminifera are 

 Trochammina incerta ; T., sp. near oligogyra, Hantken ; and another 

 near gordialis ; Marginalina = Cristellaria Zitteli, Sch wager ; Cris- 

 tellaria sp. ; Nonionina, sp. ; Orbidina neojurensis, Karrer ; and a 

 three-chambered Globigerina. These minute fossils are beautifully 

 preserved. No Ostracoda wei'e found. 



2. " Clay at the base of the Lower Greensand and on the top of the 

 Corallian ; Seend, Wilts. Most likely Kimmeridge Clay." H.B.W. 



A pale-grey clay (when dry). 



This specimen was washed completely away, leaving neither 

 Microzoa nor sand. 



3. " Clay above Iron-ore deposit ; Westbnry Ironworks, S. of 

 Station. ? Kimmeridge Clay." Rev. H. H. W. 



A stiff, mottled, blue clay, with numerous very small, rounded, 

 shining, black concretions. 



This left a very small, but rich, residuum of Foraminifera, having 

 a very characteristic Jurassic facies. Amongst the forms are Lingulina 

 carinata. var. (this is an oval Nodosarina, and, although the mouth 

 appears to be a circle of radiating fissures, we think it should be 

 regarded as more Linguline than Nodosarine in character) ; Nodosaria, 

 sp. near nitidula (Gumbel, ' Streitberger Schwammlager ') ; Dentalina 

 communis; Planidaria reticulata; P. pawperata, narrow, broad, and 

 thin varieties ; Vaginulina cristellarioides ; V. oriJionota ; V. angus- 

 tissima ; V. Txarpa, and two others (the first four are figured by 

 Beuss in his ' Norddeutschen Hils unci Gault ') ; Cristellaria rotulata 

 with three varieties leading into the next " species," Cristellaria 

 crepidula ; and Haplophragmium Canariense. 



These forms are well preserved. No Ostracoda were found. 



4. "Yellow Fullers-earth Clay; Midford." Eev. H. H. W. and 

 H. B. W. 



This and the following clay are described by Horace B. Woodward 

 in his "Geology of England and Wales" (p. 182) as "a sandy clay, 

 which is described by Mr. Bristow as usually of a greenish-brown 

 or greenish-grey colour, sometimes blue. It is opaque, soft, dull, 

 with a greasy feel, and an earthy fracture." The specimens sent 

 were of a yellow-brown colour. 



From the specimen of yellow clay we obtained only two species 

 of Foraminifera, Cristellaria crepidula and Vagimdina legumen, var. 



It is richer, however, in Entomostraca, five species of Cythere ; 

 two of Cytherideis ; three of Cytherella ; and one of Bairdia, re- 

 warding our search. 



5. " Blue Fullers-Earth ; Midford." Rev. H. H. W. and H. B. W. 

 An indigo-blue clay, drying bluish- grey, extremely rich in Micro- 

 zoa, especially Ostracoda. It is rather singular that this most 



