REPORT ON THE POLYZOA. 
145 
tion of the future differentiation into separate cells is to he observed, except in the 
part immediately continuous with the last inhabited zocecium, a faint trace marking the 
outline of the future mouth, and a still fainter indication of the distal limit of the 
zocecium ; beyond this no indications even of this faint kind are to be seen. 
(6) Lepralia margaritifera, Quoy and Gaymard (sp.). 
Flustra margaritifera, Quoy and Gaymard, Voy. de l’Uranie, pi. 92, figs. 7, 8. 
Lepralia margaritifera, Bk., Brit. Mus. Cat., vol. ii. p. 72, pi. ci. figs. 5, 6. 
Character . — Cells deeply immersed, with a row of marginal punctures ; front of cell 
raised into an elevated umbo, on the upper side of which is often a small avicularium 
with a rounded mandible and numerous larger and smaller, mostly retentive avicularia 
irregularly distributed ; mouth large, suborbicular, with a thickened margin. Ocecium 
umbonate. 
Habitat . — Station 315, lat. 51° 40' S., long. 57° 50' W., 12 fathoms, sand and 
gravel. 
[Tierra del Fuego, Falkland Islands, Darwin ; Kerguelen Island, Eaton.] 
(7) Lepralia incisci, n. sp. ? 
Character. — Zooecia quincuncial, ovate ; very convex, thick interzocecial septa. 
Surface closely pitted (not punctate). Orifice arched above, slightly contracted below ; 
the lower border slightly concave, a very minute articular notch on each side. Peris- 
tome even with the surface, very slightly thickened ; on each side of the orifice a small 
oval immersed avicularium. 
Gg 19 
Habitat . — Inaccessible Island, 60 to 90 fathoms. 
(ZOOL. CHALL. EXP. PART XXX. 1884.) 
