E. F. TOMES OF THE GEEAT-OOM.TE HADEEPOEAEIA. 191 



All such examples, so far as I have observed, are attached to speci- 

 mens of Thamnastrcea Lyelli. 



Miceosolebta. eegulaeis, M.-Edw. & Haime, Brit. Foss. Cor. p. 122, 

 tab. xxv. fig. 6. 



Alveopora rnicrosolena, M'Coy, Ann. & Mag. Nat. Hist., ser. 2, 

 vol. ii. p. 419. 



At present I have only met with this coral, as a Great-Oolite 

 species, at Fairford and Aylworth ; and it appears to be mnch less 

 abundant at those places than in the Lower Trigonia-grit of the 

 Inferior Oolite near Cheltenham. 



Genus Teicycloseeis, Tomes. 



This genus was proposed by me for a coral obtained by myself 

 from the Margaritatus-zone of the Middle Lias at Charmouth, and 

 described in the ' Quarterly Journal of the Geological Society 'in 1878*. 

 It was there described as a compound Cyclolite, having an elongated 

 and lobular form. 



Two specimens of a coral, having obviously the same generic 

 peculiarities, were procured by Miss Slatter from Eairford; and 

 these, while they confirm the genus, render some modification in its 

 definition necessary. I now define it as follows : — 



The corallum is oblong; and there is a flat basal plate furnished 

 with an epitheca ; the upper surface is in the form of a rounded 

 ridge ; and the calices are small and near together, and in a line 

 along the ridge. The central one is the largest ; and the others 

 have been produced by gemmation from it on either side, somewhat 

 as in Dimorpliarcm. From this calicular ridge the long septal costae 

 slope off all round ; and the outer boundary is in the form of a thick 

 rounded edge. The septa and endotheca are perforate and like those 

 of Microsolena. 



Teicycloseeis limax, n. sp. Plate VII. figs. 18, 19. 



The corallum is irregularly oblong ; and there is a tendency to 

 push out into lobes or corners at the ends. The under surface is 

 concave, and consists of an imperforate basal wall, which does not 

 extend all over the corallum and is furnished with an epitheca. 

 The upper surface is shaped like a rounded ridge which slopes off 

 on all sides to the thick and rounded outer margin of the corallum. 



The calices are four in number in both specimens. One, which 

 is larger than the other, holds a nearly central position, and is 

 round and well defined and has a small but deep fossula. The 

 others, which are near to it and are in the same line with it, are 

 small and irregular. About thirty septa enter into and compose the 

 middle calice. They, as well as the septal costae, are very distinctly 

 moniliform ; and they closely resemble the same parts in specimens of 

 Genabacia stellifera, from the Cornbrash of Wast, near Boulogne, but 

 are not quite so closely placed together. These septal costae are 

 * Vol. xxxiw p. 190, pi. ix. fig. 1. 



