SPONDYLUS. 121 



which I have obtained from Tournay agree perfectly with the Enghsh examples, 

 but the example figured by d'Archiac appears to differ in having the umbo of the 

 left valve less produced. 



8. subcostulatns, Stoliczka,^ appears to be a closely allied form, and was indeed 

 regarded by Geinitz as identical with >S\ stnafus. 



8. complanatus, d'Orbiguy, is imperfectly known, Ijut may be closely allied to, 

 or identical with, 8. sir la fas ; it is recorded by Mon-is from the Lower Greensand 

 of Folkestone. 



Bemarlis. — This species is known chiefly from specimens found at Warminster. 

 An example from that locality in Mr. J. F. Walker's collection shows the mterior 

 of the right valve. The size of the attached surface varies considerably in different 

 specimens. 



Specimens showing the interiors of fixed valves, resembling 8. gibhosus and 

 8. Jatus, occur in the Blackdown Greensand and the Gault of Folkestone, but I am 

 unable to determine the species without more specimens. 



Type. — From Chute Farm, Warminster, in the British Museum. 



Distribution. — Lower Greensand of Faringdon. Rye Hill Sand of Warminster. 

 Upper Greensand, Longleat. Cenomanian Sandstone of Wilmington. Base of 

 Chalk Marl of Maiden Newton. Cenomanian (Bed 11) of Branscombe. 



Spondylus latus {8oiuerlnj), 1815. Plate XXII, figs. Icy, h, 2a, h, 3, 4«7, h, 5 — 7, 



8 a— r, 9, 10 a, h. 



1815. DiANCHOEA LATA, J. Sowerhj. Min. Couch., vol. i, p. 184, pi. Ixxx, fig. 2. 

 1822. — — G. Mantell. Foss. S. Downs, p. 205, pi. xxvi, fig. 21. 



— — OBLiQUA, Mantell. Ibid., p. 206, pis. xxv, fig. 1 ; xxvi, fig. 12. 

 1836. Spondylus lineatus, A. Goldfuss. Petref. Germ., vol. ii, p. 97, pi. cvi, 



fig. 3. 

 1839. — — H. B. Geinitz. Char. d. Schicht. u. Petref. des 



siiclis. Kreidegeb., pt. 1, p. 25, 

 pi. XX, fig. 39. 



1841. — — F. A. Rhner. Die Versteiu. des uord-deutscb. 



Kreidegeb., p. 59. 



— — LATUS, Bonier. Ibid., p. 59. 



? — — OBLiQUUs, Burner. Ibid., p. 60. 



1842. — LATUS, H. B. Geinitz. Char. d. Schicht. u. Petref. des Si'iclis.- 



bohin. Kreidegeb., ])t. 3, p. 82. 



I "Palseontologia Indica," 'Cret. Fauna S. India,' vol. iii (1871), p. 449, \A. xxxiii, fig. 8 ; pi. xxxiv, 

 fig. 2. 



10 



