158 



There is a prominent columella consisting of seven or 

 eight twisted ribbon-like laminae, arranged longitudinally in 

 the fossa. The pali are connected with it by stoutish process- 

 es. 



The specimens vary in size as well as in outline ; the larg- 

 est is 47 mm. in height, without counting the curve, and its 

 calice is 26 mm. by 23 mm. in diameter. The type calice is 

 18 mm. long and 16 mm. broad. The majority of the adult 

 examples are about 30 mm. in length. 



Dredged off Cape Jaffa at from 120 to 300 fathoms, and 

 off Beachport at 110 fathoms. 



The only species with which C. ■plrnulamcllafd needs to be 

 compared is C. comnnmis, which was described by Moseley in 

 the 'Challenger" reports. His specimens came from theNo'rth- 

 ern Hemisphere, with the exception of a single broken one, 

 which is recorded from the Cape of Good Hope. 



I have not seen any examples of (\ conDumiis, but Mose- 

 ley's drawings show a species with spined or granulated pali, 

 whereas in the Australian species these structures are per- 

 fectly plain. Again, the latter has normally a pedicellate 

 base, and in some instances is still attached, while C. 

 communis is said to be constantly free and without sign of for- 

 mer adherence. 



In 1878 Tenison Woods described a curious little coral 

 which was dredged off Port Jackson under the name of Dvno- 

 cyathus paras'iticiis, the genus being new, and founded on 

 that species alone. Duncan proposed to absorb the genus, con- 

 sidering that the solitary specimen of such a very small coral 

 was not of sufficient value.* Very numerous specimens have 

 now been obtained, and though they do not fully support 

 Woods's diagnosis, the genus, slighth^ modified, may be con- 

 veniently retained. Instead of being immersed, the corallum 

 generally rises for some distance above tiie polyzoon to which 

 it is attached, and then shows distinct costge. The septa are 

 very deeply notched at their columella ends, and their central 

 tooth-like projections may be fairly classed as pali. The coral 

 has the habit of a Turbinolian, though a slight amount of 

 endotheca is noticeable in some examples. 



Genus Dunocyathus, Ten. Woods (emend.). 



Corallum simple, parasitic, rarely immersed, but usually 

 rising to some height above the polyzoon to which it is in- 

 variably attached. Septa dentate; costal prominent; one row 

 of pali. No epitheca. 



* Revision of the Madreporaria, p. 2o. 



