Palaozoic Corals and Foraminifera. 125 



about thirty curved radii : vertical section, tubes irregularly 

 transversely septate by vesicular plates ; spaces between the 

 tubes composed of slightly waved transverse rows of small, 

 curved, vesicular plates, forming a nearly uniform, minutely 

 cellular structure: horizontal section, tubes either ^ " '"" 

 shovdng more or less of the transverse vesicular plates ; iu»,^ 

 vening spaces irregularly cellular, but showing a slight dis- 

 position to form curved, star-like lines round the tubes. 



This interesting coral bears a strong external resemblance to 

 the Nemaphyllum decipiens (M'Coy), but is distinguished by 

 having no divisional lines between the stars in either section. 



Rare in the carboniferous limestone of Derbyshire. 



{Col. University of Cambridge.) 



u Sarcinula Phillipsii (M'Coy). 



Ref. ? Phil. Pal. Foss. fig. 15 D. 



I have given the above name provisionally to a coral which I 

 believe to be identical with the Flintshire one figured as above 

 by Prof. Phillips, but not named or described. It is closely allied 

 to the preceding species, but is of a thicker growth, the tubes are 

 one-third larger and surrounded by thirty-two to forty strong 

 radiating lamellse extending to the adjoining tubes, and there is 

 an obvious tendency in the middle of the transverse diaphragms 

 to extend upwards to form an irregularly compressed soUd axis, 

 often visible in the weathered cups. 



Common in the carboniferous limestone of Corwen. 



{Col. University of Cambridge.) 



Astraa carbonaria (M'Coy). -(A^/^.e^,, / 



Sp. Char. Corallum forming very large masses, terminal stars 

 from 9 lines to an inch and a half in diameter, obscurely 

 pentagonal, bounded by narrow, rounded, cellular spaces 

 (no simple divisional walls), having from 107 to 130 thin, 

 jagged, radiating lamellse, which descend to foi*m an oval or 

 circular cup, and one half of which rise again to form a large 

 oval central boss, in the centre of which the lamellee become 

 indistinctly blended : vertical section shows the uninterrupted 

 passage of the loose vesicular tissue, in gentle curves, from star 

 to star ; a very small space directly under the centre of each 

 star having the vesicular structure almost transverse : hori- 

 zontal section shows the alternately long and short radiating 

 lamellse connected throughout by fine transverse vesicular 

 plates, and the former obscurely blended at the centre (no 

 axis), and the irregular cellular structure intervening between 

 the adjacent stars. 



