COELENTERATA. 9 



When the upper layer of the shell is worn off, the arrangement of the internal 

 chamhers is exhibited ; these are formed by the crossing o two systems of walls, a 

 right and a left one. Along the margin the opening of several rows of tubuli can be 

 seen. 



Locality and stratigraphioal position. — Des valley, horizon 2. 



Remarks.— The general shape of the test of this species is so characteristic that 

 there can be hardly any doubt that the Baluchistan specimens are identical with 

 this form, first discovered in the upper cretaceous system of the Pyrenees, 



The generic position of Orbitolites macropora seems not quite certain ; 

 Leymerie, who described it as a new species under the name of Orbitolites disculm, 

 has in his subsequent memoir on the Geology of the Pyrenees referred it to the genus 

 Orbitoides. I take the view of d'Archiac, who thinks that it belongs to the genus 

 Orbitolites, and that 0. disculus Leymerie is identical with Orbitolites macropora. 

 Defrance. 



II. COELENTERATA. 



Class- ANTHOZOA. 



ZOANTHARIA. 



Eamily: ASTR^ID^. 



Genus: TROOHOSMILIA. 

 Teochosmilia protectans, spec. nov. PI. I, fig. 7-75, 8-86, 9-96, 10-105. 



Height of corallnm ..... 

 Large diameter of calice .... 

 Small diameter of calice .... 



The corallum reaches a tolerably large size ; but in the above figures the heights 

 are a little too small, because the basal portion of the corallum, with which it was 

 apparently attached to foreign bodies, is broken away in all specimens ; it is simple 

 cuneiform, compressed, and slightly curved in the direction of the small axis of the 

 calyx. The basal portion is attenuated and the place for attachment very small. 

 Younger individuals exhibit a somewhat different shape to that of full grown 

 specimens, because at the earlier stages they grow more rapidly in breadth than in 

 height. In the figures given above, specimens V and VI afford instances where the 

 breadth of the corallum considerably surpasses its height — an observation which can 



