LEPRALIA PALLASIANA. 297 



belonging to the same section, we see the tendency to the 

 secondary development of the peristome which is so 

 strongly marked in this family. 



i. With a simple primary orifice only. 

 Genus LEPRALIA, Johnston (part.). 



Der. From Xeirpa scurf, and u\os marine. 



ESCHARA (part), auctt. 

 LEPRALIA (part.), auctt. 

 LEPRALIA, Smitt. 



GENERIC CHARACTER. ZOCECIA usually ovate, with the 

 orifice more or less horseshoe-shaped, arched above, con- 

 tracted at the sides, and with the lower margin entire and 

 generally slightly curved outwards. ZOARIUM (in the 

 Jiritlsh species] incrusting, or rising into foliated expansions 

 composed of one or two layers of cells. 



LEPRALIA PALLASIANA, Moll. 

 Plate XXXIII. figs. 1-3 ; and Plate XXIV. fig. 4. 



ESCHARA PALLASIANA, Moll, Seerinde, 64, pi. iii. fig. 13. 



CELLEPORA PALLASIANA, Lamx. Pol. flex. 95, no. 190. 



FLUSFRA HIBERNICA, Hass. Ann. N. H. vi. 172, pi. vii. fig. 1 ; ibid. vii. 370. 



LEPRALIA PEDILOSTOMA, Hass. Ann. N. H. yii. 368, pi. ix. fig. 4 (not the L. 

 pedilostoma of Couch). 



LEPRALIA PIDIOSTOMA, Johnst. B. Z. ed. 2, 315, pi. IT. fig. 7. 



LEPRALIA PALLASIANA, JBusi; Mar. Pol. ii. 81, pi. Ixxxiii. figs. 1, 2; Crg 

 Pol. 54, pi. ix. fig. 7 ; (var. armata) Quart Journ. Micr. Sc. 

 ZoophytoL, IT. 309, pL xi. figs. 1, 2: Hincks, Devon Cat, 

 Ann. N. II. Her. 3, ix. 204 : Smitt, (EfT. K Vet.-K. Forh, 

 1867, Krit Fort. IT. 19 and 123, pi. xiri. fig. 93. 



Zooecia large, broad-ovate, distinct, coarsely punctured 

 over the entire surface, disposed in lines ; orifice ample, 

 longer than broad, arched above, contracted on cadi 

 side below the middle, lower margin slightly curved 



