66 BRITISH FOSSIL CORALS. 
broad, straight, granulated laterally, unequally developed, but not differmg much in the 
first and second ecycla. Pali corresponding to the septa of the first three cycla, rather 
narrow, and unequally developed in an inyerse fatio to the corresponding septa ; no pali in 
the radii of the septa belonging to the fourth cyclum. Height of the corallum, three lines ; 
diameter of the calice, four lines. 
This species belongs to the fourth section of our genus Trochocyathus (Z. dreves), and 
consequently its characters need not be compared with those of the various species belonging 
to the sections of the 7. simplices, T. cristati, and 7. multistriati, the description of which 
may be found in our ‘ Monograph of the Turbinolide.’ It differs from 7: odesus, 7. armatus, 
and 7. perarmatus,' by not having any costal spines, and from 7. Afichelini by the coste 
being distinct down to the basis, and by its general form being less depressed. It appears 
to be most closely allied to the fossil which we shall next describe under the name of 
Trochocyathus (?) Konigi, but is of a more slender form. 
T. Harveyanus was found in the Gault at Folkstone, the birthplace of the illustrious 
physiologist to whom we have dedicated this species. The specimens here described belong 
to the collections of Mr. Bowerbank and Mr. D. Sharpe. 
3. Trocnocyatnus (?) Kontet. 
TurBinoi1a Kontat, Mantell, Mlust. of the Geol. of Sussex, p. 85, tab. xix, figs. 22, 24, 
1822. 
— — Fleming, British Animals, p. 510, 1828. 
_ (tRocHocyaTHUS?) Konte1, Milne Edwards and J. Haime, Monogr. des Turb., 
in Ann. des Se. Nat., 3"° série, vol. ix, p. 335, 1848. 
The specimens of this fossil figured by Mr. Mantell, and those which we have seen in 
the collections of MM. d’Orbigny and Michelin, are in a very bad state of preservation, 
1 This species, which has been lately designated under the name of Turbinolia perarmata by 
M. Talavignes, but has not yet been described, and has been given to us by that geologist, was discovered 
at Fabresan, in the department of the Aude. M. Alex. Rouault has since then met with the same species 
at Bos d’Arros in the Lower Pyrennees. (See Bull. Soc. Géol., 2™° serie, vol. v, p. 206.) It may be 
recognised by the following characters : 
Corallum very short, subdiscoidal ; its under surface flat and almost smooth; sometimes adhering to a 
small shell. Coste distinct near the calice, projecting very little, closely set, almost equal, and delicately 
granulated; those of the first eyclum not differmg much from the others, but bearing, at a short distance 
from the calicular edge, a strong spiniform appendix, which is rather compressed, extends outwards, and 
presents, on its under edge, a small pointed tubercle. Calice circular. Septa forming four complete cycla 
and six equally developed systems; closely set, rather exsert, thin, and unequally developed ; but those of 
the second cyclum differing very little from the primary ones. Pali narrow and rather thick. Height of 
the corallum, one line and a half; diameter of the calice, two lines and a half. Fossil from the Nummulitiec _ 
formation at Fabresan and Bos d’ Arros. 
