284 



ox OVr CELLS OF SOME LIClIEXOPOUiE, 



LicnExoPORA vicTORiEXSTs, iiom. IIOV. (PI. XY. fig. 4.) 

 Discoporella reticulata, MacGillivray, Trans. Roy. Soc. Vict. vol. xx. 

 p. 126, fig. 1. 



There is already Lichenopora reticulata, since Hagenow described 

 a fossil as Defrancia reticulata (Bry. der Maast. Kreide, p. 43, 

 pi. iv. fig. 8, non 4). Marsson has already shown that the descrip- 

 tion refers to fig. 3 and not to 4. It is possible that this may 

 have been described under another name, but this is not certain ; 

 and I certainly cannot agree with Dr. Pergens, who would call it 

 diadema, uniting the Defrancia disticha, Hag., D. diadema, Gold., 

 and D. reticulata, Hag. 



As Mr. MacGillivray describes it from Victoria, I would suggest 

 the name L. victoriensis. 



This is one of those species in which without the ovicellular 

 ducts it w^ould be difficult to say whether there was an ovicell or 

 not. The central area is covered by the ovicell, the covering of 

 which is formed by large raised trabeculse, within which there is 

 a smaller reticulation formed by similar trabeculse. There are 

 spines with knobs from the walls of the trabeculsB, similar to those 

 1 described in Lichenopora grignonensis (Ann. Mag. Nat. Hist, 

 ser. 5, vol. xx. p. 262, pi. vii. fig. 4). In the present case I have 

 only figured a few of these spines, not to complicate the figure 

 too much. The spaces between the trabeculsB are filled in with 

 a perforated cover. Aperture of zooecial tubes about 0'06 mm. 

 wide. 



Loc. Victoria {MacG.); Port Stephens, 5-6 fath., New South 

 Wales. 



DiSCOTTJBTGERA ? LINEATA, MacG, (PI. XV. fig. 5.) 

 Diastopora lineata, MacGillivray, Trans. Roy. Soc. Vict. vol. xxi. p. 96, 

 pi. iii. fi^. 1. 



Liripora lineata, MacG. Cat. Mar. Polyzoa of Vict., Hoy. Soc. Vict. 

 1887, p. 32. 



Discotubigera lineata. Waters, Ann. Mag. Nat. Hist. ser. 5, vol. xx. 

 p. 260, pi. vi. fig. 24. 



I have already (loc. cit.) alluded to the ovicell, but it has never 

 been figured, and therefore I add a figure of an ovicell occurring 

 near the border of the zoarium. It will be seen that it is of a 

 type quite different from that of LicJienopora ; but as yet we are in 

 ignorance concerning the ovicells of Discotuhigera and its allies. 



