16 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



to be subject to considerable variation. The tabula? are complete and are 

 on an average, about 1*5 mm. apart, and in some specimens " squaniulse " 

 are seen to be present though never apparently in large numbers. 



Abundant in the Corniferous and Hamilton formations of Ontario ; 

 found also in the Oriskany sandstone. The largest specimen in the 

 museum is from the Corniferous ; it was about 1 foot long when perfect 

 and is over 5 inches in diameter at its broadest part. Calamopora 

 basaltica of Goldfuss from the Eifel (pi. XXVI, figs. 4c, 4d, op. cit.) bears 

 a strong resemblance in the size and curve of its corallites and the arrange- 

 ment and size of the pores to F. turbinata, Billings. The specimen 

 figured by Goldfuss is a fragment only, so that it is impossible to tell what 

 the shape of the corallum was when entire, although the marked curve of 

 the corallites might suggest a form similar to the typical one of F. turbin- 

 ata. 



In the enlarged drawing the pores are in a single row on two sides of 

 the corallites and there is a partly double row on a third side, also in 

 figure 4c the pores are shown in single and double rows. The tabulae are 

 apparently complete. 



If, at any future time, it is found that F. turbinata is the same speci- 

 fically as the coral represented by Goldfuss in these two figures, the name 

 turbinata would still remain in use as the other form of Calamopora 

 basaltica, Goldfuss from Lake Erie (fig. 4a), which is in the writer's 

 opinion conspecific with F. epidermata, Rominger and was evidently 

 considered the type of the species by its author, as it is mentioned and 

 figured first, should be known as F. basaltica, Goldfuss. 



It is possible that the Calamopora hemispherica of Troost is conspecific 

 with F. turbinata but the description is so indefinite as to render it a 

 matter of conjecture whether the two belong to the same species or not. 

 As the " Fifth Geological Report to the Twenty-third General Assembly 

 of Tennessee" may be difficult of access to many it is thought advisable 

 to give Troost's description in extenso ; it is as follows: — "Calamopora 

 hemispherica, nobis. The fossil to which I have applied the name of hemi- 

 spherica occurs, so far as I have been able to observe, only in hemispherical 

 masses. It is formed of tubes of such size that nine of them, placed the 

 one next to the other, will occupy half an inch ; they radiate from the 

 centre towards the circumference. In the interior of the mass they are 

 internally and externally prismatic, but the upper surface is so much 

 incrusted, that their oral apertures have no regular shape. Some of these 

 tubes (on water worn masses) project here and there, and are then internally 

 as well as externally cylindrical, and not connected together ; they may 

 be mistaken for Syringopora. The transverse septa are flat, and the con- 

 necting pores placed in the middle of the sides." 



