10 Transactions of the Society. 
Mucronella ventricosa var. multispinata Busk, with which, however,. 
Busk unites it. 
Lepralia cleidostoma Smitt, plate III. fig. 16. 
Lepralia cleidostoma Smitt, Floridan Bryozoa, p. 62, pi. xi. 
pp. 217-219. 
There is more variation in the width of the operculum than is at 
all usual in the Bryozoa. Whether this difference indicates that the 
aperture of sexually mature zooecia is different from the others, cannot 
he decided from the specimen examined, nor has the specimen any 
ovicells. This is much like L. hippopus Smitt, as already pointed out 
by Smitt, but differs in having triangular avicularia. 
Lepralia Pallasiana var. strumata , plate III. figs. 33, 3d. 
This differs from typical L. Pallasiana in having a collar below 
the aperture extending across the zooecium, and from the resemblance 
in this respect to P. struma Norm. I have called it var. strumata. It 
also differs from the typica and var. projecta in my collection in having 
a smaller aperture. L. Pallasiana typica is unknown with an ovicell,. 
but ovicells occur frequently on what I called var. projecta, and they are 
also abundant on the specimens before us ; and Mr. Hincks described 
one from Madeira with ovicells, but he does not mention any collar,, 
though it is possible that it was this variety in which the collars were 
slightly developed. The collars commence as a series of tubercles, 
and then there is little to distinguish it from typica. 
The ovicell has several large pores, and is closed by the oral oper- 
culum, and is closely united to the cell above. 
This is very similar to the Lepralia ( Phylactella ) columnaris of 
Kirkpatrick, from Mauritius, in which, however, judging from the 
figure, the ovicells are much smaller. 
Lepralia peristomata nom. nov., plate III. fig. 20. 
Lepralia Mangnevilla Busk, Q. Journ. Micr. Sci., vol. viii. I860,, 
p. 284, pi. xxxi. fig. 5. 
I do not think that the Madeira species described by Busk is the 
same as Audouin’s Cellepora Mangnevilla, and have therefore given, 
it a new name. Audouin does not show the ovicells immersed, nor a 
pronounced peristome, and he figures avicularia by the side of the 
aperture as they occur in Smittia trispinosa. 
The present form would have to be placed under Phylactella, if 
that genus were recognised, but the raised peristome is known in so 
many genera that Phylactella cannot be retained. The broad band 
at the side of the operculum indicates the position of peristomata 
under Lepralia. 
The specimen which I mentioned as Mucronella canalifera Busk,* 
* ‘ Challenger * Supp. Report, pt. lxxix. vol. xxxi. p. 24, pi. iii. fig. 44. 
