360 ESCHA11ID.E. 



iii. With a mucronate peristome . 

 Genus MUCRONELLA, Hincks. 



Der. From macro, a point. 



BERBXICEA (part.), Fleming. 

 LEPRALIA (part.), Johnston: Busk: &c. 

 ESCHARELLA, Gray. 

 DISCOPOEA (part.), Smitt. 



GENERIC CHARACTER. ZO<ECIA with a suborbicular or 

 semicircular orifice ; the peristome elevated in front into a 

 more or less prominent mucro, ZOARIUM (in the British 

 species] incrusting. 



THIS genus is equivalent in part to the Discopora of 

 Smitt, but not of Fleming, who originated the name for 

 a species belonging to a totally different section of the 

 Polyzoa (the Cyclostomata] , with which it is still connected 

 in the slightly modified form Discoporella. In the British 

 species the lower margin of the orifice is almost univer- 

 sally dentate. 



a. Without avicularia. 

 MUCRONELLA PEACHII, Johnston. 

 Plate L. figs. 1-5, and Plate LI. figs. 1, 2. 



LEPRALIA PKACHII, Johnst. B. Z. ed. 2, 315, pi. Iv. figs. 5, 6: Gray, Br. 

 Radiate, 118: Bitsk, B.M. Cat. ii. 77, pi. Ixxiii. fig. 4, pi. 

 xci. figs. 5, 6, pi. xcvii. ; Crag Pol. 48, pi. v. figs. 6, 7, 8, 

 pi. Ti. fig. 4; (?ar. labiosa) Quart. Journ. Micr. Sc. iv. 309, 

 pi. i. figs. 5, 6 : Heller, Bryoz. d. Adriat. Meer. 32. 



LEPRALIA IMMERSA, Johnst. B. Z. ed. 2, 325, pi. Ivii. fig. 8. 



BERENICEA JMMKK.SA, Flem. Br. An. 533 : Couch, Corn. Faun. pt. iii. 118. 



ESCHARELLA IUUERSA, Gray, Br. Bad. 125. 



DISCOPOBA COCCINEA, forma PEACHII, Smitt, loo. cit. 26 & 170, pi. xxvii. figs. 

 164-166, & 167 (referred to L. ventricosa). 



? DISCOPORA EMUCEONATA, id. Krit. Forteckn. (Efy. &c., 1871, 1129, pi. xxi. 

 figs. 27, 28. 



