84 



1904. Haly sites pycnoblastoides R. Etheridge : A Monograph of the 

 Silurian and Devonian Corals of New South Wales. Pt. I , The 

 Genus Halysites. Mem. Geol. Survey, New South Wales. 

 Palaeontology No. 13, p. 30, pi. IV., Figs, i, 2; pi. VIII., figs. 

 5, 6. 



191 5. Halysites pycnoblastoides Y.\be : Bemerkungen iiber einige Haly- 



sites-Arten p., 36 (12), pi. IX (V), figs. 3, 4. 

 1915. H. pycnoblastoides Y\hv. d.nd }r{h\kS\}s.A: Palaeozoic Corals from 



Japan, Korea and China, Journ. Geol. Soc. Tokyo, vol. XXII., 



p. 79. 



Corallum pyriform, small, 30 mm. high and 1 5 mm. wide : fenestrules 

 somewhat irregularly polygonal and unequal in size ; one side of the fenest- 

 rules composed of i-ii corallites together with the corresponding number of 

 the interstitial tubes ; the average width of the fenestrules is 15 mm. Coral- 

 lites oval in cross section, 1.8 X 1.5 mm. large, traversed by numerous tabulae 

 which are complete and concave upwards ; there are 8-9 tabulae in a space 

 of 5 mm. Septal spines well developed in the corallites, always 12 in num- 

 ber, directed obliquely upwards ; rather long, but not so long as to form a 

 pseudocolumella at the center of the corallites. Interstitial tubes well deve- 

 loped, regularly intercalated between the corallites ; those at the junction of 

 three corallites are especially large, unequally six-sided, while the others are 

 smaller, (0.5 X0.3 mm.), rectangular and elongate at right angle to the chain 

 of the corallites. Tabulae in the interstitial tubes horizontal, slightly less 

 than twice as many as those in the corallites. 



Obs. — The single specimen of this species at hand being a young stock, 

 it must be expected that its fenestrules will somewhat be smaller than those 

 of the older stocks ; nevertheless the present specimen shows already very 

 characteristic features of the fenestrules in their irregular polygonal outline 

 and by being very variable in size. 



The interstitial tubes of the specimen show a kind of small spinous pro- 

 cesses, which are no doubt of different origin from those in the corallites. 



Now comparing this specimen with those forms previously described from 



