Prof. T. JR. Jones 8f C. D. Sherborn — Jurassic Microzoa. 273 



remarkable deposit of Entomostraca has not been noticed before. 

 We have mounted and arranged upwards of three hundred individuals 

 of more than fifty species already, and look for a much larger number 

 before we close our work. The majority of the species were 

 obtained from little more than one pound weight of material. 

 Foraminifera are much scarcer, but there is the same proportionate 

 abundance between the two groups as in the yellow-brown clay 

 above described. A few fragments of shells also occurred, but too 

 imperfect for identification ; also ossicles of Pentacrinus, and a few 

 broken minute spines of Echinoderms. 



The Foraminifera include a subcarinate variety of Gristellaria 

 rotulata, near to one figured by Jones and Parker (Q.J.G.S. vol. xvi. 

 1860, pi. xs. f. 43); Gristellaria crepidula; Vaginulina legumen ; 

 Planularia, sp. near reticulata. Cornuel ; Nodosaria lineolata, Reuss, 

 and Frondicularia peregrina, Eeuss (' Bohm. Kreide ') ; and a simple 

 four-rayed star, like the " Siderolina-like forms " figured by Giimbel 

 from the " Streitberger Schwammlager " in " Jahresh. Ver. nat. 

 Wiirtt. 1862, Jahrg. 18, p. 235, pi. iv. f. 19. This little specimen 

 has been shown to Dr. Hinde, who thinks that, although calcareous, 

 it is most likely a modified dermal spicule of a hexactinellid Sponge. 



The Entomostraca represent, provisionally, thirty-four species of 

 Cythere ; three of Cytherideis ; three of Cytheridea ; five of Cytherella ; 

 six of Bairdia, also Gytherura, Pontocypris, Macrocypris, and possibly 

 Aglaia and Argilloecia. 



The examination of these forms is affording us very great pleasure, 

 being, though exceedingly small, very finely preserved and perfect. 

 It is interesting to note, that we identify some ten of them as oc- 

 curring amongst those figured from the Richmond Well in Q.J.G.S. 

 vol. xl. pi. xxxiv. 



6. " Loamy beds in Hiuton Sand, Forest-marble ; Charterhouse- 

 Hinton, Somerset." H B.W. 



A light-brown loam with small " clay galls." This leaves after 

 washing a residuum of fine, subangular, quartzose sand. After 

 careful search we found some extremely small Foraminifera and one 

 Ostracod : — Cristellaria crepidula ; Marginulina glabra ; and a valve 

 of Cythere. 



7. " Bradford Clay ; Bradford. This is the clean clay immediately 

 overlying the fossil-bed." H.B.W. 



A light-brown clay, which, on washing, left a few waterworn 

 Entomostraca and two much waterworn Foraminifera. The latter 

 are Cristellaria crepidula and Vaginulina legumen ; and the former 

 are three varieties of Cythere. 



8. " Bradford, No. 1. Near Canal. Locus classicus.'''' Rev. H.H.W. 

 No Microzoa found on examination. 



9. Bradford, No. 2. Near Bradford. Tattle higher in position 

 than No. 1." Rev. H.H.W. No Microzoa. 



10. " Oxfordian ; Upper Studley, Trowbridge. Probably Kella- 

 ways Rock." H.B.W. 



Dark greenish-brown, friable sandstone of subangular quartzose 

 sand, with calcareous cement. No Microzoa found. 



DECADE III. VOL. III. KO. VI. 18 



