76 Professor T. Rupert Jones — Cretaceous Enlomostraca. 



18. JSairdta angusta (Miinster). Monogr., p. 26. This is a 

 Cyiherideis ; and though the specific determination is doubtful, being 

 based on Count Miinster's vague description, yet I do not propose to 

 interfere with it, 



19 and 20. Bairdia triquetra (Jones), diXidi Bairdia siltcida (Jones). 

 Monogr., p. 27. These are not well defined, but most probably 

 belong to the genus Bairdia. 



21. Cyiherella ovata (Eoemer). Monogr., p. 28. A well-known 

 species. 



22. Cytlierella truncata (Bosquet). Monogi'., p. 30. M. Bosquet is 

 satisfied that this is the same as Cytlierella Muensteri, Eoemer, sp. 

 (1838), See also my Mon. Tert. Entom., p. 56; here, however, 

 possibly, pi, 5, fig. 12, behmgs to another species. 



23. Cyiherella Williamsoniana (Jones). Slonogr., p. 31. A good 

 species, for which many allies have been found in the Cretaceous 

 formations of Europe, and in the recent state. Possibly var. 

 granulosa is a distinct species. 



24. Cyiherella (?) appendiculata (Jones). 

 far more likely a Cytherura. 



25. Cytherella(?) Mantelliana (Jones) 

 be accepted as a true Cyiherella. 



26. Cytherellai?) Bosqiieiiana (Jones). 

 Cyiherella ; but probably a Cythere. 



Monogr. p. 32. This is 



Monogr., p. 32. This may 



Monogr, p, 33, Not a 



Over-cautious in referring our English forms to published (and 

 often badly figured) Continental species, and too bold in assigning 

 wide limits to specific and generic groups, in my Monograph on the 

 Cretaceous Entomostraca, I stretched a palasontological virtue into 

 an error, which better knowledge, attained by the work of many, 

 will enable us to rectify in detail, 



I must add that the references frequently made in the Monograph 

 to similar Entomostraca in other geological formations, and in 

 existing seas, have to be re-examined in very many cases, and 

 much curtailed. I again express my hope of being able to publish 

 far better drawings of these Cretaceous species. 



Appended is a corrected list of the Cretaceous species : — 



Old Names. 

 Cythere Hilseana, Eoemer. 



„ punctaiula, Eoemer, 



„ umboiiata, "Williamson. 



,, faba, Eeuss. 



,, Bairdiana, Jones, 

 Cythereis interrupla. Bosquet, sp. 



„ Gaullina, Jones. 



,, macrophthalma^ Bosquet, sp. 



,, triplicala, Eoemer, sp. 



„ quridrilatera, Eoemer, sp. 



„ ciliata, Eeuss, sp. 



„ Lonsdaleiuna, Jones. 



,, cornuta, Eoenier, sp. 



„ alata, Bosquet, sp. 



Names now Adopted. 

 Cytheridea perforata, Eoemer, sp. 

 Cythere concenlrica, Eeuss. 

 Cytheropteron umbonatum, "Will., s 

 Cythere simtdata, Jones (1869). 

 Cythere Bairdiana, Jones. 

 Cythere Marrisiana Jones (1869). 



,, Gaultina, Jones. 



„ macrophthalma, Bosquet. 



,, tripticata, Eoemer. 



,, quadrilalera, Eoemer. 



„ oriiatissima, Ess. 



„ Lonsdaleiana, Jones. 



„ ornatissima, var. 



„ alata, Bosquet. 



