74 Dr. T. Wright on Fossil Echinoderms 
tubercle is prominent and central; the granulations are almost 
microscopic; the base is flat; the mouth is small and central, 
and the anus marginal; the ambulacral, sulci are bifid; the 
margin of the test is thin, and the sinuosities well marked. Let 
the student compare these characters with the detailed description 
of S. subrotunda given in the preceding article. 
Locality and stratigraphical range.—It was collected from bed 
No. 4, the calcareous sandstone at Malta, where it is not common. 
Our French specimen is from the middle tertiaries of Terre- 
Négre. 
Genus Ecurnotampas (Gray, 1835). 
Test of an elongated or subdiscoidal form; petaloid portion 
of the ambulacral areas large, generally elevated into convex 
leaves, contracted towards the base, where they cease to rise 
above the level of the test ; inferior surface concave towards the 
mouth, which is median, symmetrical, pentagonal, and sur- 
rounded by five lobes; basal portions of the ambulacra with five 
short poriferous zones around the mouth; anus transversely 
oblong and inframarginal; apical disc small and excentral, five 
genital and five ocular plates placed around the madreporiform 
body ; tubercles small, uniform and numerous, sunk in the test, 
and surrounded by ring-like areolas. Three species are living 
in the seas of warm latitudes; the others are fossil, mostly in 
the tertiary rocks. A few are found in the upper stages of the 
cretaceous series. 
Echinolampas Kleinii, Goldf. 
Syn. Clypeaster Kleinii, Goldfuss, Petrefact. Germanic, tab. 42. 
fig. 5. p. 133. 
Echinolampas Kleinti, Desmoulins, Etudes des Echinides, p. 346. 
no. 14; Agassiz and Desor, Cat. raisonné, Ann. Sc. Nat. 
tom. vil. p. 166. 
Test ovato-orbicular in the outline, with the posterior border 
slightly produced ; dorsal surface convex, posterior half more 
elevated than the anterior; ambulacral areas unequal, usually 
on a level with the general surface, but sometimes more 
convex and prominent than the rest of the test; apical disc 
excentral and anterior ; base concave; mouth excentral and 
anterior ; anus inframarginal; both mouth and anus trans- 
versely oblong. 
Dimensions. — Antero-posterior diameter 2,% inches, trans- 
verse diameter 233 inches, height 1,9, inch. 
Description.—This Urchin has been well figured by Goldfuss, 
and is a very characteristic fossil of the Miocene tertiary beds 
