GENERA OF FA VOSITIDyE. 



179 



or may be crossed by an occasional partition, and which runs 

 down the centre of the visceral chamber of each corallite, and 

 possesses non-perforate walls. Septa represented by crenula- 

 tions of the walls of the corallite, which are continued over the 

 upper surfaces of the tabulae in the form of a series of short 

 spines or tubercles, arranged in radiating rows, till they ulti- 

 mately disappear in the depths of the central tube (fig. 27). 



This extraordinary genus is only known by a number of 

 silicified specimens, in a state of beautiful preservation, col- 

 lected by Mr George J. Hinde in the Niagara Limestone of 

 Manitoulin Island, Canada, and about to be fully described by 

 him under the name of Syringolites Huronensis} Under these 





'J ATI •) 





Fig. 27. — A, A fragment of a colony oi Syringolites Hitrtmcnsis, Hinde, of the natural size ; B, 

 A single calice of the same, enlarged eight times, showing the central tube, and radiating 

 lines of septal tubercles ; c, Part of a corallite of the same, split open, and enlarged six 

 times, showing the composition of the central tube out of invaginated tabulae ; D, Part of 

 a corallite of the same, viewed from the exterior and enlarged six times, showing the 

 mural pores. Niagara Limestone, Manitoulin Island, Ontario. Coll. George J. Hinde. 



circumstances, it would not be proper for me to do more than 

 to say that, after a careful examination of the specimens col- 

 lected by this indefatigable observer, I am able to entirely 

 corroborate his views as to the structure of the genus, while I 

 may justifiably add a few general remarks bearing upon the 

 connection between this new type and those which have been 

 previously considered. 



In the first place, then, it is clear that in Syringolites, Hinde, 

 we are presented with a coral closely allied to Favosites proper, 

 as shown by its general form, its prismatic corallites, intimately 



1 Since the above was written, Mr Hinde has published his description of S. 

 Huronensis [see Geol. Mag., Dec. ii., vol. vi. p. 244, June 1879). 



