MR J. W. GREGORY ON THE MALTESE FOSSIL ECHINOIDEA. 



597 



margin, and large anus, is an easily recognised species. In its young stages it is liable to 

 confusion with C. folium, Agassiz, the type of which came from Palermo. Dr Weight 

 recorded this latter species from Malta, on the strength of a specimen in the Earl of 

 Ducie's collection : it was probably a young form of this species. In the collection of 

 the Geological Society there are four Clypeasters which enable the young stages of 

 C. altus and C. marginatus to be compared. The two largest specimens are of almost 

 the same size, so that the following measurements may be of interest : — 





C. altus. 



C. marginatus. 



Height, 



26 mm. 



20 mm. 



Length, 



• 72 „ 



72 „ 



Width, 



• 62 „ 



67 „ 



Diameter of anus, 



2-5 „ 



*(«),. 



Shape, 



. Oval. 



Pentagonal; margin 

 more sinuous. 



Fam. SCUTELLIDiE. 

 Genus Scutella, Lamarck, 1816. 

 Species Scutella striatula, Marc, de Serres, 



1829. 



Synonymy — 



Scutella striatula, Marc, de Serres, 1829, Geogn. Terr, tert., p. 156. 



„ „ L. Agassiz, 1836, "Prod. Mon. Rad.," Mem. Soc. Neufchatel, i. p. 188. 



,, „ Desmoulins, 1837, " 3 re Mem. Ech.," Aetes Soc. Linn. Bordeaux, viii. p. 80. 



„ „ L. Agassiz, 1841, Mon. Scutelles, p. 81, pi. xviii. f. 1-5. 



,, ,, Agassiz and Desor, 1847, Cat. rais. Ann. Sci. Nat. Zool. (3), vii. p. 134. 



E. Desor, 1857, Syn. Ech.foss., p. 232. 



T. Wright, 1855, "Foss. Echinod. Malta," Ann. Mag. Nat. Hist. (2), xv. pp. 

 119-120. 

 „ „ R. Tournouer, 1869, " Recensement Echinod. Calcaire a Asteiies," Actes Soc. Linn. 



Bordeaux, xxvii. pp. 278-82. 

 „ „ Benoist, 1885, Descr. geol. paleont. St Estephe et de Vertheuil, p. 62. 



G. Cotteau, 1891, Pal. Franc. Terr. tert. Eoc. Ech., II. pp. 240-2, pi. cclxii. 

 Echinodiscus suhrotundus, pars Leske, 1778, Addit., p. 206, pi. xlvii. f. 7. 



Scutella subrotunda, pars G. Michelotti, 1861, "Etudes Mioc. inf. Italie Sept.," Natuurk. Verh. 

 Holl. maatsch. Wetensch. Haarl. (2), xv. p. 23. 

 „ „ (non Leske), G. Seguenza, 1879, "Formaz. Terz. Reggio," Mem. R. Ac. Lincei 



(3), vL 42. 



Type.— Ag. Casts, S. 78. 



Distribution. — Malta — Lower Coralline Limestone (Oligocene). France — Le Tremble, 

 near Bourg (Mid. Eocene). Gironde— Calcaire a Asteries (Tongrian). 



Remarks. — Scilla, in his De Corporibus Marinis Lapidescentibus, gave three figures 

 of a Scutella which he called "Echinus melitensisl' &c; his name was not binomial, and 

 as it is pre-Linnean, his figures are only of value from the use made of them by later 

 writers. Leske, in his Additamenta, gave a new figure of a Maltese Scutella which he 



