METOPASTER SUBLUNATUS. 51 
this fossil, and the radial dimensions can only be calculated approximately. The 
specimen figured by Forbes, which I have unfortunately not been able to trace, is 
smaller than either of the above. The drawing represents a test with the major 
radius measuring about 25 mm., the minor radius 20 mm., and the length of the 
side about 28 mm. The figure of the actinal aspect of this example is reproduced 
on Pl. XIV, fig. 3, of this memoir. 
Locality and Stratigraphical Position.—This is a well-known Upper-Chalk form. 
It is recorded by Forbes from Kent, Sussex, and Wiltshire. Specimens in the 
British Museum bear the localities of Charlton, Gravesend, Bromley, and 
“* Kent.” 
History.—This species, primarily described by Forbes in his memoir ‘ On the 
Asteriadz found fossil in British Strata,’ was first figured in Dixon’s ‘ Geology 
and Fossils of the Tertiary and Cretaceous Formations of Sussex,’ London, 1850. 
The example which I consider must undoubtedly have been the type (Dixon, 
pl. xxi, figs. 4 and 5) I have hitherto unfortunately not been able to find. Itis 
stated by Forbes to have formed part of the late Mr. Pearce’s collection, and to 
have been obtained from the Wiltshire Chalk. A badly drawn fragment (Dixon, 
pl. xxi, fig. 8) is preserved in the British Museum, but I do not consider it to be 
correctly referred to this species. In my opinion it belongs to a distinct species, 
Metopaster cingulatus, of which a description is given at p. 53. 
The examples of this species which have been drawn on PI. XIV are preserved 
in the British Museum. 
6. Merropaster suBLuNaAtTuUS, Forbes, sp. 
GonrasTER (GonrIopIscus) suBLUNATUS, Forbes, 1848. Memoirs of the Geological 
Survey of Great Britain, vol. u, 
p: 472. 
— — — Forbes, 1850. In Dixon’s Geology and 
Fossils of the Tertiary and Cretace- 
ous Formations of Sussex, London, 
4to, p. 331. 
— — — Morris, 1854. Catalogue of British Fos- 
sils, 2nd ed., p. 81. 
ASTROGONIUM SUBLUNATUM, Dujardin and Hupé, 1862. Hist. Nat. 
Zooph. Behin. (Suites 4 Buffon), 
p. 399. 
GontasTER (GoNIODISCUS) SUBLUNATUS, Forbes, 1878. In Dixon’s Geology of 
Sussex (new edition, Jones), 
p. 365. 
