48 CRETACEOUS ECHINODERMATA 
1. CiDARis niuuDO, Sorignet. PI. VII, Figs. 3—16. 
Cot teau, Pal. Fran?, ten-, cret., vol. vii, p. 244, pi. 1054 bis, figs. 6-16. 
This .species is represented by a great number of spines and a few plates, both 
agiceiug in eyery respect with similar portions of the test described and figured bv 
Dixon and Cotteau. The ambulacral areas have six rows of gi’anules, the outermost 
on each side being the largest, and betw'een the inner rows some smaller granules 
are irregularly interposed. Each two pores of the narrow poriferous zones are 
separated by a small granule, superseded by a short groove. The primary tubercles 
of the interambulacra have rather low, small, perforated mamelons, and the bosses 
Avith smooth, sharp edges siu-rounded by large areolae. The margin of the latter 
is proAuded AA’itli from IG to 18 mammillated granules, and the rest of the surface 
of each ambulacrum with small, densely set, round or slightly elongated granules, 
between which occasionally some very minute ones are interposed. 
The spines haAm ahvays a more or less distinct fusiform shape, with a slender, 
tolerably long neck, inflated about or above tlie middle, then someAAdiat attenuated 
and truncated at the end. The margin of the articular cavity is conspicuously 
crenulated ; the head very minutely striolated, somcAvhat coarser on the milled ring 
itself than above it. The stem is surrounded by numerous longitudinal ribs, more 
or less distant from each other, and Avith shorter and longer ribs interposed between 
the others ; they arc generally granular, but the granules are almost invariably 
better developed on the basal than on the terminal portion of the stem, and near 
the neck they arc occasionally dissoh^ed into simjilc rows of granules. Rarely more 
than eight to twelve of the princijial ribs extend to the tip of the stem, Avhere they 
form a kind of rosett, with a few unequal granules in the impressed centre. The 
interspaces between the ribs are regularly finely sbagreened. 
Locality . — MoraAuatoor, in brownish marly limestone. 
Formation . — Ootatoor group. 
Ciclaris hirudo is a well known and widely spread species in the Cenomanien 
and lower Senonien beds of France and England. Forbes first noticed it as a 
variety of and subsequently proposed to call ii sulcata, but Sorignet’s 
name has priority. 
2. CiDARis conf. VESICULOSA, Goldfuss. PI. VII, Figs. 21 — 24. 
Cotteau, Pal. Fran?, terr. cret., vol. vii, p. 222. 
Wright, Mon. llrih. Cret. Echinodermata, p. 41. 
A few spines of a rather slender, subfusiform shape appear to belong to this 
species. They have a small articular cavity, with a crenulated edge, like those of 
the preceding species, but the neck is more slender and smooth ; the longitudinal 
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