146 CATALOGUE OF THE ZOOPHYTES OF 



deep-water specimens, this expansion is often calcareous and 

 granulated, but more frequently it is smooth, and has a semi- 

 transparent corneous texture. The avicularia are numerous and 

 very variable in position, but there is generally a large one on 

 each side of the ovicapsule, sloping outwards like a pair of ears. 



7. M. PouiLLETii, Aucl PI. X., fig. 5, 



Cells ovate, broadish below, rather larger than in 31. Fle- 

 minguj and without the inner expansion; margin granu- 

 lated, with a thin rim; spines 4, or sometimes 6, round the 

 top of the cell, short, one only on each side visible below 

 the ovicapsule. Ovicapsule large, globose or elongated, 

 strongly granulated and occasionally perforated. Avicu- 

 laria dispersed; sometimes a small one on each side of 

 the ovicapsule. 



Memhrampora memhranaceay Johns. Brit. Zooph., 328 



(part)? 

 Memhranipora Pouilletn, Audouin (Expl. I,, p. 240), 

 Savigny, Egypt, t, ix., f. 12. 

 On shells and zoophytes, especially on Flustra foliacea ; fre- 

 quent. 

 This species is distinguished from the last principally by ne- 

 gative characters. Though not quite so common as M. Fle- 

 mingn, it is far from rare. Both are sometimes found together on 

 Flustra foliacea, overlapping each other, but not intermingling. 

 In this case a comparison between the two can readily be made. 

 M. Pouilletii is distinguished by the larger size of its ovicapsules, 

 which are more strongly frosted or granulated than in M. Fle- 

 mingn, and often a good deal elongated ; by the partial absence of 

 spines, and by the entire absence of the expansion partly filling 

 up the cell, which is so peculiar a feature in the latter species. 

 For the name, and the reference to Savigny's work, I am in- 

 debted to Professor Busk, who has also kindly sent me a tracing 

 of Savigny's figure, which fully warrants the identification. 



8. M. UNICORNIS, Fle7n. PI. X., fig. 6. 



Cells stout, oval; the margin granulated, with 2 spines 



