FOREIGN JURASSIC COLLYRITID^. 327 



Formation. — "Du 12" etage Callovien des environs d'EscragnoUes (Var.)" 

 Collection. — M. d'Orbigny. 



CoLLYRiTES CARiNATUs, Leske. Sjn. Spatangites cnrinatus, Leske, apud Klein, tab. 51, 



figs. 2, 3. Goldfuss, Petref. Germ., tab. xlvi, fig. 4. 

 Desor, Disaster, tab. iii, fig. 1. 



Test small, inflated, cordiform ; with an anteal sulcus, and a carina or ridge more or 

 less marked, which extends from the middle of the upper surface to the vent. Base 

 convex and cushioned, single inter-ambulacrum very prominent at the base, anal opening 

 marginal. 



Formation. — Oxfordien de Gunsberg (Cant, de Soleure). Oxfordthon ; Thonkalkemit 

 Terehratula impressa, Weisser, Jura (a), (Oxfordian.) Quenstedt. 



CoLLTRiTEs CAPiSTRATA, DesmouUns. Syn. Spatangus capistratus, Goldfuss, Petref. Germ. 



Agassiz, Echinid. Foss., tab. iv. Desor, Disaster, 

 tab. iii. 



Test cordiform, rounded anteriorly, with an anteal sulcus, tapering behind, and inflated 

 at the sides, without a dorsal carina ; vent in the middle of the posterior border ; postero- 

 lateral ambulacra rise high up on the dorsal surface and converge at a point nearly 

 equidistant from the anterior summit and the vent. 



Dimensions. — Height, seven tenths of an inch ; breadth, one inch ; length, one inch 

 and one fifth. 



Formation. — Corallien inferieur d'Urach, (Wiirtemberg) , de Porrentruy, Ste. Croix, 

 Weisser, Jura a (Oxfordian). (Quenstedt. Wiirtemberg. 



Collections. — Museums Neuchatel, Bale, British. Abundant. 



CoLLYRiTES EXCENTRiCA, Milnst. Syu. NeiccleoUtes excentricits, Goldfuss, Petr. Germ., 



tab. xlix. Desor, Disaster, tab. iv, figs. 1 — 3. 



Test small, nearly circular, or elliptical, abruptly truncated posteriorly; posterior 

 ambulacra converge above the vent, which opening is high up towards the dorsal surface. 



43 



