46 THE CRAG POLYZOA. 



12. L. BRONGNIARTII, Audouin. PI. VI, fig. 1. 



Cellulis ovatis seu pyriformibus transversim ragulosis, distantibus, spatiis reticulatis 

 distinctis. Aviciilario parvo ad apicem orificii supra armatis. Ovicellula pyramidal!, 

 aviculario cristata. 



Cells ovate or pyriforra, transversely rugose, distinct, separated by reticulated spaces 

 or large openings; orifice suborbicular transverse; a minute avicularium on the summit of 

 each cell above and behind the orifice; ovicell pyramidal, crowned with an avicularium. 



CELLEPORA BRONGNIARTII, Audouin, Explan., p. 240 ; Savigny, Egypt, pi. x, fig. 6. 

 LEPRALIA BRONGNIAUTII, Busk, B. M. Cat., part ii, p. 65, pi. 81, figs. 1 5. 



TENTHS, Hassall ; Johnston. 



CATENATA, Peach, MSS. 



ASSIMILIS, Johnston ; Gray. 



JACOTINI, Gray. 



Habitat. C. Crag, Sutton, S. W. (on shell). (Recent) Britain, Mediterranean, on 

 shells, stones, or fucus. 



13. L. MAMILLATA, S. W. PI. VI, fig. 5. 



Cellulis suberectis, magnis, supra liberis, coarctatis, infra ventricosis, superficie rugoso- 

 granulata seu sulcata ; basin circa serie uuica vel multiplici punctorurn ornatis. Orificio 

 suborbiculari aculeum internum infra ostendente; peristomate antice et ad latera producto, 

 postice late emarginato 2-4 spinis marginalibus superioribus. Ovicellula depressa, globosa, 

 superficie granulosa sen sulcata. Aviculario parvo utrinque ante ovicellulam posito. 



Cells suberect, superiorly free and projecting; contracted above, ventricose below; 

 surface coarsely granular or sulcate ; a single or multiple row of pores around the base ; 

 orifice suborbicular, with a spinous process within the lower margin ; peristome much pro- 

 duced in front and laterally, deficient posteriorly ; 2-4 marginal spines above and behind ; 

 ovicell depressed spherical, surface granular or sulcate. A small avicularium on each side 

 in front of the ovicell. 



C. MAMILLATA, S. Wood, Ann. Nat. Hist., xiii, p. 19; J. Morris, Cat. B. Foss., p. 120. 



I retain the name affixed by Mr. Wood to specimens in his collection, though not 

 satisfied with him that it is the form intended by Blainville, under the same appellation. 

 The species is very distinct and well marked, at once recognisable by its great com- 



