62 FOREIGN OOLITIC CIDARIDtE. 



CiDARis PROPiNQUA. Miinst., in Goldfiiss, Petrefact., p. 119, t. 40, fig. 1. 



Agassiz, Echin. Eos. Suisse, ii, p. 62, t. 21, figs. 5, 6, 7, 9, 10. 



Test small, depressed ; ambulacra much flexed, with two rows of marginal granules ; 

 poriferous zones narrow, sunk; pores small, contiguous; inter-ambulacra with four or 

 five plates only ; areolas small ; bosses small, summits nearly smooth ; tubercles very large 

 and prominent; scrobicular circles complete, touching, formed of prominent spaced-out 

 granules. Spines short, elliptical, clavate; stems much swollen out in the middle, and tapering 

 to a point at their distal extremity, covered with longitudinal rows of large, distinct granules. 



Formation. — Coral Rag, Jura blanc, (Argovien etage ?) 



Localities. — Baireuth. 



Argovien des Laegern, du Randen. 



Argovien (formation y, Quenstedt) Sirchingen, Wiirttemberg. 



Environs de Metz, Moselle. 



Collections.— M.\x^QVim& of Zurich, Bale, Tiibingen, Neuchatel. 

 British Museum, my Cabinet. 



CiDARis ELEGANS. Miiust., in Goldfuss, Petrefact., p. 118, t. 39, fig. 5. 



Test small, depressed ; areolas small, circular ; tubercles large and prominent, bosses 

 crenulated ; scrobicular circle formed of spaced-out granules ; ambulacra with two rows 

 of marginal granules. Spines short, clavate ; stem covered with small granules. 



Formation. — Coral Rag of Baireuth, Bavaria. 



Coral Rag of Nattheim, Sigmaringen, Wiirttemberg. Formation t, Quenst. 



Collections. — Museums of Bonn, Tiibingen, Stuttgart, my Cabinet. 



CiDARis coRONATA. — Goldf., Pctrefact., p. 119, t. 39, fig. 8. 



Agassiz, Echinod. Foss. Suisse, ii, p. 59, t. 20, figs. 8 — 17. 

 Quenstedt, Petrefactenkunde, t. 48, figs. 16 — 21, with beautiful 



and accurate details. 

 Desor, Synopsis des Echinides Foss., p. 9, t. 1, fig. 1. 



