or SOUTIIERX INDIA. 
53 
the Articulata with tlie plates on the upper part of tlic calyx articulated, and the 
Tessellata, in which all the plates composing the calyx arc merely in contact with 
each other, without articulation. 
Of the Articulata, the only species occurring in the cretaceous roclcs of South 
India is a JPeutacrinus, a few fragments of a stem having been found in the Arrialoor 
sandstone near Shillagoody. The short, at the margin distinctly dentated, joints 
are, at the middle of the periphery, provided with a tuberculatcd ridge, the tubercles 
being most conspicuous between the rounded angles of the joints. The facets on 
the jdanes are oval, and the grooves and ridges long ; the central areolm narrow, 
their breadth being equal to onc-third of the whole width of one facet. The general 
character of the stem exactly agrees with that of an unnamed species delineated in 
figure 11 on plate xix of Dixon’s Gcol. of Sussex, this specimen with several other 
similar ones being derived from the white chalk. (Comp. pi. VII, figs. 38—39). 
Of the second group, two siiccics appear to ho represented, belonging to the 
remarkable genus Marsupltes, which, together with Astylocrinus, belongs to a special 
family — the MARfiuriTiDjE , — differing from all other knoAvn T essellata\>y single 
basal and an entirely free calyx, without a trace of a stem or a special place of 
attachment. 
I. MAESUPITES, Mantell, 1821. 
Miller, Crinoiden, p. 131. 
Mantell, Foss. Sth. Downs, p. 183. 
Calyx cup-shaped, perfectly free, composed of regular series of plates ; one 
basal surrounded by two alternating superposed zones, each of five subradialia, and 
followed by a series of five radialia, to which five dichotomous arms are attached ; 
ventral portion of calyx apparently covered with scales or small plates, out of 
which the oral aperture protruded. 
The species of this genus are only known from upper cretaceous deposits. 
1. Marsupites Mileeri, Mantell. PI. VII, Pig. 41. 
1822. M. Milleri, Mantell, Geol. Sth. Downs, p. 184 ; — idem auctorum. 
31. caiyce ovate cupuliformi, tabula basali penlagona, subraclialihus inferioribus 
pentagonis, mperiorihus ccqualibus, hexagonis, lateraliter suhangustatis ; radialibust 
minoribus, crassis, supra medio articulationibus eniarginatis instructis, lateraliter 
declivihus, ad angulos subsulcatis, sulcis fere ad mediani tahularum subradialiuni 
prolong atis ; tabulis omnibus modice convexiusculis, radiatim granulatis atque ad 
margines striata stdcatellis. 
The basal is perfectly equal in form and size to one of the lower suh-radials, 
while one of the hexagonal suh-radials is a trifle smaller, and the radials are consi- 
derably smaller, but thicker than the others. At the upper end the radials have 
broad, nearly semi-circular depressions, the external segment being sepai'ated by a 
raised x'idge, provided with a hole in the centre, while the inner portion is trilobate ; 
( 123 ) 
