216 MICROPORELLID^l. 



condition, the vitreous and hyaline cells literally glittering 

 on the red weed, which it specially loves. " It is so glassy 

 in its texture," writes Mrs. Gatty, " that the colour of the 

 red Phyllophora can be distinguished through the cell." 

 The punctures, which are surrounded by a white ring, 

 show very prettily on the clear and glistening surface. 

 When the polypides are living, their delicate bells have 

 the appearance of a bluish mist over the hyaline and 

 speckled crust. 



MlCROPORELLA VIOLACEA, Johnston. 

 Plate XXX. figs. 1-4. 



LEPRALIA VIOLACEA, Johnst. Br. Zooph. ed. 2, 325, pi. Ivii. fig. 9: Biisfc, 



B.M. Cat. ii. 69, pi. kxxvii. figs. 1, 2 ; Crag Pol. 43, pi. iv. 



fig. 3 : Manzoni, Bryoz. Plioc. Ital., 1st Contrib. 5, pi. i. 



fig. 9 (Sitzb. k. Akad. d. "Wissensch. Bd. lix. 1. Abth. Jan.- 



Heft, 1869). 



ESCIIARELLA VIOLACEA, Gray, Brit. Ead. 125. 

 LEPRALIA PLAGIOPORA, Busk, Crag Pol. 44, pi. iv. fig. 5. 

 LEPRALIA DIVERSIPORA, Beuss, Forain. Anthozoa u. Bryoz. d. Deutsch. 



Septar. 60, pi. viii. fig. 3. 



PORINA VIOLACEA, Smitt, Floridan Bryoz. pt. ii. 30. 

 PORINA PLAQIOPORA, id. ibid. 



Zocecia ovate or lozenge-shaped, surface roughened, fre- 

 quently punctured or areolated round the border, and 

 sometimes surrounded by a raised line ; a rather deep 

 depression in the centre, within which there is a single 

 circular pore; orifice slightly arched above, elongated 

 transversely, the lower margin nearly straight; peri- 

 stome somewhat thickened and raised above; immedi- 

 ately below the inferior margin an avicularium, with an 

 acute mandible pointing upwards. Ooecia none. 



Var. a. Zocecia flat below, much raised towards the orifice ; 

 the peristome much elevated behind the mouth, and 

 projecting like a pent-house ; two pores in the central 

 depression. Avicularium very long and slender ; raised 



