FROM THE LOWER GREENSAND. 



43 



There is no cpitheca, and the costa; arc distinct. 



There is no coknnclla, and the septa iniite Uterally, and are very numerous. . 



TuRBiNosERis De-Fromenteli, JJujiccm. Pi. XV, figs. 13 — 18. 



The coralluin is tall, and more or less cylindro-turbinate. 

 The cahce is shallow, and circular in outline. 



The septa arc very numerous, long, thin, straight, and many unite laterally with longer 

 ones. There are 120 septa, and the cyclical arrangement is confused. 

 The synapticulse are well developed. 



There is no columella, and the longest septa reach across the axial space. 

 The costae arc well developed, and often are not continuous with the septal ends. 

 Height, 1 i^otlis inch. Breadth of calice, l-njt^s inch. 

 V ariefi/. — With a constricted wall and large base. 

 • Localitij. Atherfield, in the Lower Greensand. Li the Collection of the Royal School 

 of Mines. 



The necessity for forming a new genus for this species is obvious. It is the neighbour 

 of Trochoseris in the sub-family of the Lophoserina. This last genus has a columella, 

 and the new one has none. 



The species has not been hitherto described, but it has been familiarly known as a 

 Montlivallia ; but the synapticula3 between the septa and costa3 determine the form to 

 belong to the FwngiclcB. 



V. — List of New Species from the Lower Greensand. 



1. BrachycyatliKS Orhignyanus, Ed. and H. 



2. TrochosmUia Meyeri, Duncan. 



3. Isadran Morrisii, „ 



4. Tnrbinoseris De-Fromenfeli, ,, 



VI. — List of the Species from the Lower Greensand. 



1. Jlrac//ycyaf/ii(s Or6iynya}?us, Ed. and H. 



2. Siiiilolrochus Austeni, Ed. and H. 



3. TrocJiosiiiilia Meyeri, Duncan. 



4. Jsas/rcpa Morrisii, ,, 



5. Tnrbinoseris De-Froi)ionleli, ,, 

 G. llolocyalis elcyans, Lonsdale, sp. 



7 



