10 
range as well as strength, and in some cases they were scarcely detectable, ” 
clearly refers to the septa on the tabulated portions of the corallum, and not 
in the calice, the structure of these two portions of the coral differing con- 
siderably, as will he seen from the specific descrijition given above. 
I am under the impression that Lonsdale’s figure represents a specimen 
inverted, the apparent tabular boss being in fact the downwardly projecting 
septal fossula, similar to that represented in our PL VIII, Pig. 2, and PI. 
IX, Pig. 13. Its excentric position hears this out. 
Locality^ and Horizon. — Jervis Bay, Slioalhavcn District, Co. St. Vin- 
cent {C. Cullen)', Shoalhaven Heads, ditto (C. Cullen) : — Upper Marine Group. 
Zapiirentis (Pleropiiyllum ?) CAiNODON, De Koninck. 
PI. Till, Pigs. 13-16. 
Zai^hrentis cainodon, De Koninck, Poss. Pal. Nouv. Gallos cln Sud, 1877, Pt. 3, p. 151, 
t. 5, f. 8, 8«. 
Sj). Char. — Corallum cylindro-conical, long, rather curved, gradually 
tapering, and of somewhat irregular habit from unequal growtli accretions, 
pointed at the base ; section generally oval. Calice deep, open. Septa forty 
to forty-two in number, thickened by a deposition of stereoplasma, which 
unites to form a coalesced mass on the dorsal side ; dorsal septa slightly 
shorter and straighter than the ventro-lateral, which are curved, and unite in 
two groups to surround a septal fossula, which reaches to the centre of the 
calice, and contains from one to three counter septa of variable length ; 
cardinal septum not apparent ; dissepiments moderately well developed on the 
ventral side, and generally irregular in their arrangement ; dissepimental 
vesicles, some oval, some tiaangular, but usually irregularly developed. 
Tabulate area small, tabular immediately below the calice vesicular. Biigm 
appear to be simple both on dorsal and ventral sides ; epithcca not pre- 
served, but probably thiu.^ 
Obs. — This species generally resembles the next to be described, Z. 
gregoriana, but is much longer and proportionately larger, the calice 
rounder in section, and the relative increase in diameter within a given sj)acc 
much less. Lastly, the septa arc more numerous, and the septal fossula 
shorter. 
* other localities recorded are — Barber’s, Barber’s Creek, and Amprier, near Clenrock, Co. Argyle 
{St.rzelecki) ; .Sboalhaven District ( Sirzelecki) ; Curradulla. or Limestone Creek,? Co. Argyle (M'Coi/, Ann. Slag. 
2^at. Hist., 1847, XX, p. 228) ; Colocolo (De Koninck). 
2 De Koninck describes the epithcca as probably thin and smooth. 
