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ZOOPHYTOLOGY. 



1. Polyzoa cheilostomata. 

 Gen. 1. Membranipora, Blainville. (* Brit. Mus. Cat.,' p. 56.) 



1. M. hexagona, Busk. PI. XII,, fig. 4. 

 Area of cell hexagonal, or sub-elliptical ; surface smooth ; septa smooth, 

 even ; mouth semilunar. 



Flustra coriacea, E. Forbes ; Johnston, * Brit. Zooph.,' p. 348. PI. 



LVL, fig, 8 (non ' Esper Pflanzth. 

 Fhist.,' Tab. vii., fig. 2 ; Busk, ' Brit. 

 Mus. Cat.,' p. 57. PI. LXXIIL, fig. 

 4,5). 

 Hab. Coast of Devon, Miss Cutter; Isle of Man, E. Forbes; Fowey 

 harbour, Peach; Sana Island, Hyndman. 



The species figured by Esper, under the name of F. coriaceo, 

 is clearly not the same as the one here represented, which seems 

 to correspond with E. Forbes' description and Dr. Johnston's 

 figure. Esper's figure corresponds more nearly with the M. 

 coriacea of the Brit. Mus. Catalogue, which is also a British 

 form. For the specimen from which the present figure was 

 taken, I am indebted to Miss Cutler. 



Gen. 2. Lepralia, Johnston. 



1. Ij. ringens, n. sp. Busk. PI. IX., figs. 3, 4, 5. 



Cells ovate, with a circumscribed area in front ; surface minutely ]Hmc- 

 tured, scaly ? ; a vibraculum on the front or side of the cell ; mouth ex- 

 panded below the base of the moveable lip into a transverse, sub-crescentic 

 fissure ; 4 to 6 marginal spines. 



Hab. Shetland, on stone, Barlee. (In the Newcastle Museum, pre- 

 sented by Dr. Edward Charlton.) 



A curious form which, as Mr. Alder, to whom I am indebted 

 for the drawings from which the figures are taken, remarks, " has 

 very much the appearance of a Membranipora, filled in with 

 calcareous matter similar to the rest of the cell. There is a 

 strong raised rim in the same position as in [some] Memhrani- 

 porce. The mouth is very curious. There is a wide transverse 

 aperture, edged with a horny substance, below what appears to 

 be the true mouth covered with the horny operculum ; but I 

 cannot," he says, " make out whether or not there is any 

 calcareous division between the two. In the freshest cells the 

 surface, when highly magnified, has a beautiful scaly appearance, 

 each scale being perforated {vide fig. 5). In the older cells the 

 perforations only appear." 



2. L.fissa, n. sp. Busk. PL IX., fii^s. 8, 9, 10. 



Cells ovate, immersed, quincuncial, or disposed in parallel contiguous 



