302 A. J. JUKES-BROWNE ON THE RELATIONS OF 



sima," there is one specimen in the "Woodwardian Museum. This 

 and the preceding are the only characteristic Warminster species 

 that occur at Cambridge. 



ECHINODERMATA. 



Cidaris gaultina, Forbes. PL XY. figs. 13, 14. 



Cidaris gaultina, Forbes, Mem. Geol. Surv. Dec. v. Suppl. to 

 pi. v. p. 2 ; Pal. Soc. 1864, p. 36, pi. i. f. 2-4. 



A fine cast, retaining a portion of the shell in a phosphatized 

 condition, and two other less perfect specimens apparently belonging 

 to this species are in the collection of the University. Mr. Price 

 recognizes them as similar to those found in the Upper Gault of 

 Folkestone. The first mentioned is figured at PI. XV. f. 13, and 

 measures 20 lines in diameter, with a height of 16 lines. Fig. 14 

 is a segment from the Upper Gault of Folkestone in Mr. Price's 

 collection, not so much crushed as that figured in the Pal. Soc, 

 which did not admit of measurement. 



PsEUDODIADEMA CARTERI, "Woodw. PI. XY. figS. 15-17. 



Diadema Carteri, Woodw. Mem. Geol. Surv. Dec. v. pi. ii. p. 9. 



The type specimens of this species in the Woodwardian Museum 

 appear to me very different from P. ornatum, to which Dr. Wright 

 has referred it. They are much smaller and higher in proportion, 

 having a width of 10 lines, and an altitude of 6, according to Dr. 

 Woodward ; the ambulacral tubercles become rapidly smaller above ; 

 the secondary tubercles are few, whereas in P. ornatum they extend 

 from the peristome nearly to the disk ; lastly, the space between the 

 interambulacral tubercles is strongly granulated. Mr. Seeley has 

 described four more species, two of which, P. scriptum and P. inversum, 

 much more closely resemble P. ornatum, and have in fact been so 

 named in the Museum at Jermyn Street. I cannot help thinking 

 there has been some confusion in the specimens which were sub- 

 mitted to Dr. Wright, and that he has not seen the original types of 

 P. Carteri. I have therefore figured two of these on PI. XY. f. 13-15. 



Crustacea. 



Diaulax Carteriana, Bell. 



Diaulax Carteriana, Bell, Pal. Soc. Cret. Crust, pi. i. f. 14-16. 



This small Crustacean has recently been obtained from the Folke- 

 stone Upper Gault, adding therefore another link between that 

 formation and the Cambridge bed from which it was originally de- 

 scribed. Four or five have been found in Bed XI. by the indefati- 

 gable fossil-collector, Mr. Griffiths ; one of these, not quite perfect, 

 is now in the Woodwardian Museum, which also possesses specimens 



