2GO MYRIOZOID.E. 



upwards, and elevated above the surface of the cell. These 

 large avicularia are also scattered irregularly over the 

 zoarium. 



ScHIZOPORELLA AURICULATA, Hassall. 

 Plate XXIX. figs. 3-9. 



LKPRALIA AURICULATA, //as*. Ann. N. H. ii. 412 : Johnston, B. Z. ed. 2, 310, 

 pi. liv. fig. 8 : Busk, B.M. Cat. ii. 67, pi. Ixxxix. figs. 4-6. 



E.OCHARELLA AURICOLATA, Smitt, OEfv. K. Vet.-Ak. Forh. 1867, Bihang, Krit. 

 Forteckn. iv. 12 & 90, pi. ixiv. figs. 58, 59. 



LEPRALIA OCHRACEA, Hincks, Dev. and Cornw. Cat., Ann. N. H. ser. 3, ii. 

 206, pi. xii. fig. 3. 



Zooecia rhomboid, occasionally subovate, short, depressed, 

 disposed in linear series, radiating from a central point, 

 separated by raised lines, punctured or granular, some- 

 times covered with a thick reticulated crust; orifice 

 suborbicular, with a sinus below ; marginal spines 2-4 ; 

 a small avicularium, with rounded mandible, imme- 

 diately below the centre of the lower lip, usually on a 

 mamillary eminence, which is sometimes prolonged 

 into a mucro, frequently replaced by a larger avicu- 

 larium, with spatulate mandible. Ooecia subglobose, 

 depressed, closely united to the cell above, sometimes 

 completely immersed, punctured, often partially enve- 

 loped in a granular crust ; occasionally mucronate. 



Colonies spreading in subcircular patches of a bright red 

 colour; when young surrounded by a distinct border 

 of partially developed zooacia. 



Var. a. ochracea (=Lepralia auriculata, var. Leontiniensis, 

 Waters). Surface of the zoarium flat, thickly covered 

 with minute papillae; orifice of the zooscia suborbicular, 

 produced below into a pointed sinus ; a little below it a 

 small oval avicularium, immersed, sometimes placed ob- 

 liquely, mandible pointing downwards; often replaced 

 by a very large, elongate avicularium, covering a great 

 portion of the front of the cell; mandible of almost 



