3(j6 CiEOLCXJY AXl) PETHOLOGY OK TllK (iHKAT SKliPEXTIXK BELT OF X.S.W., 



\iew of tile eorallites in the Russian species is not given, liut tliey are saiil to be 

 polygonal and in'egularly arranged. The species has since been referred to Man- 

 ticuUpora on account of its double-walled structure. 



Undoubtedly the nearest allied form is the ''Alveolites'' septosa Milne Ed- 

 wards and Haime,t a coral described from the Mountain Limestone (Upper Car- 

 boniferous) of Corwen, near Bristol, Lee in Northumberland, in Westmoreland, 

 Derbyshire and Ireland; also at Novgorod, Russia. Chaetetes septosus M. Edw. 

 and Haime sp. has been shown by Messrs. Nicholson and Etheridget to belong 

 to the genus Chaetetes and not to Alveolites. That species differs from the i)re- 

 sent Chaetetes spinuliferus in the greater development of the septal teeth and 

 spines seen in vertical section at or near the junction of the tabulae, and also in the 

 more irregular growth of the eorallite walls, which in C. septosus are nearly 

 uniformly parallel. The form of the eorallites in transverse section and the 

 development of the septal tooth are in both species nearly comparable . 



Occurrence. — Lower Carboniferous Limestone. Parish of Moorowarra, New 

 South Wales. 



POLYZOA. 



Order CYCLOSTOMATA. 



Genus Fistulipoea McCoy. 

 FiSTULipORA iiicROscopicA, sp . uov. (Plate sxiv.. fig. 8.) 



Description. — Zoarium small, parasitic or encrusting; more or less lamellate; 

 zooecial tubes sparsely tabulate, open and flexuose; interspaces with two or more 

 series of vesicles. Diameter of zooecial tubes, .13 mm, diameter of vesicular 

 cells, .08 mm.; height of zoarium, 2.5 mm. 



The zoarium is seated on a base of calcareous algae and is in turn overgrown 

 by a similar organism. The zooecial opening's are not clearly seen, but all other 

 structures point to its being a typical FistuVporu, although of such snuill ilinu-ii- 

 sious. 



Comparisons. — This species resembles Hexagonella* another of the Fistuli- 

 porids, in structure, but is more minute and is not dendroid in habit of growth. 

 The interzooeeial tissue is more horizontally extended in vertical section, and the 

 mesopores are larger than in Fistulipora incrustans Phillips sp.,$ which our spe- 

 cies otherwise much resembles. Moreover, F. incrustans is a larger form, having zooe- 

 cia of twice the diameter of /•'. microscopica. It is interesting to note that F. in- 

 crustans is also a Carboniferous species, being found in the Carboniferous Lime- 

 stone of Yorkshire, Northumberland, Derbyshire, West of Scotland, and Ireland. 



Occurrence. — In Lower Carboniferous Limestone. Parish of Mcorowarra. 

 New South Wales. 



Genus C ViC I. o I n o T R Y p a, gen. nov. 



Zoarium adnate or encrusting and repent; filling up intei-stices in sliells, etc. 

 Apertures of surface maculae sub-circular; vesicrdar tissue not well developed. 



tMon. Pal. See, vi., 1852, p.l57, PI. xlv., figs.S, 5a, b. 



JJoui'n. Linn. Soc. Lend., xiii., 1877, p. 365. 



'.See Hinde, Geol. Mas-, Dec. iii.. Vol. vii., 1890, p.aoo, Pl.viii., fig.ti; Pl.viiia., fi'jcs. 

 5, 5a-d. 



gPhillips, Geol. Yorkshire, Pt. ii., 18.36, p.200, PI. i., figs.63, 64 ( Calamofiora iii- 

 rnis/'ins). A/so Nicholson and Foord. Ann. Mag. Nat. Hist., ser.5, vol.xvi.. 1885, p.500. 



