36a Mr. P. W. Bassett- Smith on 



StylopJiora ptstiUata, Esper, sp. 



1797. Madrepora pistillata, Esper, Madre. pi. Ix. 



A single fragment doubtfully belonging to this species. 

 Tizard Bank, 7 fath. 



Btylofliora (?) Ehrenhergij E. & H. 



1859. Stijlophoi-a Ehrenbei-gi, E. & H., Ann. des Sci. Nat. 3° ser. t. xiii. 

 p. 105. 



A small fragment was obtained which apparently belongs 

 to this species. It is doubtful, however, whether the form 

 can properly be retained in the genus Stylophora, since there 

 is apparently no coencnchyraa and in character the septa much 

 resemble those of an Astrtean coral. 



Tizard Bank, 3 fath. 



Stylophora Guentheri^ sp. n. 



Corallura incrusting, growing in thin successive layers over 

 foreign objects ; upper surface uneven, with nodose projec- 

 tions. Base with wrinkled epitheca formed of delicate con- 

 centric lines. The layers from 1 to 3"5 millim, in thickness. 

 Calices circular, without regular arrangement, not projecting, 

 but on a level with the general surface ; no definite lip deve- 

 loped. The calices from '8 to 1 millim. in diameter, from '3 

 to 1 millim. apart, usually four in 5 millim., rarely five in 

 this distance. The septa delicate, six small as well as the 

 six large can be recognized, the free edges markedly dentate. 

 Columella styliform, prominent, reaching nearly to the level 

 of the calice. Interspaces between the calices thickly beset 

 with minute blunt spines. In places fine lines can be seen in 

 the interspaces, marking polygonal outlines of the corallite. 

 Occasionally there is a small papilla-like prominence on one 

 side of a calice apparently connected with one of the large 

 septa ; but this character does not appear to be general. 



This species is characterized by its incrusting mode of 

 growth, the small size and insert character of the calices, and 

 the strongly dentate septa. Two specimens were obtained, 

 one (alive) from a depth of 32 fath., the other (dead) from a 

 depth of 22 fathoms. 



Macclesfield Bank, China Seas, 22 and 32 fathoms. 



