MARINE POLYZOA. 75 



preaches Lep. ciliata ; the difference in the form of the ovicell, 

 however, a striking and peculiar feature in the present species, 

 appears amply sufficient to justify their separation. The form 

 of the ovicell in F. (L.) umbracula (And. Expl. i. p. 239 ; Savign. 

 Egypt, pi. 9. fig. 3) is very similar apparently to that of L. per- 

 sonata, as is also in some degree that of the ovicells of L. galeata 

 mihi, PI. XCIV. figs. 1, 2) and of L. reticulata (PL XCIII. 

 figs. 1, 2). 



22. LEPRALIA DEPRESSA, n. s. PI. XCI. figs. 3, 4. 



Cells quite immersed, depressed, the upper margin only being 

 slightly raised ; outline suborbicular or suboval ; mouth con- 

 tracted in the middle, the lower half being filled in by a horny 

 membrane, lip slightly thickened ; a semicircular penthouse-like 

 projection a short distance above the mouth ; a vibraculum on 

 the side of the cell nearly on a level with the mouth. 



Hab. Egean Sea, on fucus, loosely attached, E. Forbes. 



23. LEPRALIA LYALLII, n. s. PI. CI1I. fig. 6. 



Cells oval, walls thin, verrucose or rugose ; mouth raised, 

 margin thickened, with a spout-like sinus in front, and five to 

 six spines on the sides and above ; a small vibraculum on many 

 of the cells, on one side near the top. 



Hab. New Zealand, on fucus, Dr. Lyall, R.N. 



2. Inarmatse. 

 Without either avicularia or vibracula. 



a. With oral spines. 



24. LEPRALIA VARIOLOSA. PI. LXXIV. figs. 3, 4, 5. 

 PL LXXV. 



Cells oval, immersed or subimmersed, usually disposed in 

 linear series ; punctured or areolated round the margin, granular 

 (sometimes punctured) in front ; mouth rounded or subquadran- 

 gular, with two to four close-set spines quite at the summit ; 

 lower lip with a projecting mucro and an internal bifid denticle. 

 Ovicells deeply immersed, also areolated round the margin. 



Lepralia variolosa, Johnst. Brit. Zooph. 2/8. pi. 34. fig. 4; Has- 

 sall, Ann. fy Mag. Nat. Hist. vii. 367 ; Couch, Zooph. Cornw. 

 50 ; Corn. Faun. iii. 116. pi. 22. fig. 6 ; W. Thompson, Ann. 

 Nat. Hist. v. 253; Johnst. Hist. Brit. Zooph. ed. 2. p. 317. 

 t. 55. figs. 8, 9. 



