152 



PROE. P. MAETiN" Duncan's eevision of the 



Grenus Asteroseris, JE. de Fromentel, Pal. Fran^., Terr. cret. 

 torn. viii. p. 328 (1867). 



Syn. Stephanoseris, E. de From., non Ed. & H. 



Oorallum hemisplierical, with an imperforate basal plateau, 

 wliicli is discoid and covered witli granulations which are in 

 radiating lines near the edge. Columella slightly developed, 

 and reduced to three or four slightly visible points. The septa 

 are large, unequal, and strongly granulated where free. Pali well 

 developed before the tertiary septa. Synapticula present. 



Distribution. — Fossil. Cretaceous : Europe. 



M. de Fromentel does not say anything about the dissepiments 

 or the condition of the septa. 



G-enus Microseeis, F. de Fromentel, Pal. Frang., Terr. cret. 

 No. 23 (1870), p. 367. 



Corallum hemispherical. Wall horizontal, naked, and covered 

 with sparsely distributed granulations which do not simulate 

 costse. Septa large, arched, uniting in joining at the centre of 

 the calice, where there is a little rounded fossula. Synapticula 

 rare, but well developed. 



Distrilution. — Fossil. Cretaceous : Europe. 



This genus requires further consideration. 



III. Alliance PSAMMOSERIOIDA. 



Simple Lophoseridse with the base containing a Sipunculid worm or 

 growing on univalve shells, low. Penultimate septa well developed. With 

 or without pali. No epitheca. 



Genus Psammoseris, Ed. & H. 



Genus Stephanoseris, Ed. & H. 



Genus Psammoseris, Milne-Fdwards Sf Jules Haime, Hist. Nat. 

 des Corall. vol. iii. p. 55 (1880), pi. x. figs. 9, 9a; Ann. des 

 Sci. Nat. 1848-49, Zool. tom. 9 ; amended. 



Corallum simj)le, low ; base broad, containing a Sipunculid 

 worm ; sides perforated with several apertures. The wall is 

 thick, naked, strongly granulate, and barely striated below, cos- 

 tulate elsewhere. Calice circular. Columella spinulose, papillary. 

 Septa low, thick, close, granular; primaries and secondaries 

 longest and largest ; the septa of the fourth cycle next in length, 

 and uniting axially in front of the tertiaries. 



Distribution. — Beeent. Chinese seas, Malacca. 



