62 MR. A. W. WATERS ON 
127 fathoms, have large zocecia with very thin walls and an 
avicularium with triangular mandible at each upper corner. 
There is no ovicell. As far as can be seen, it agrees with Jullien’s 
species from the North of Spain, and is much like Membranipora 
membranacea with the spinous process developed into avicularia. 
There are 18 tentacles. 
Besides the Membranipore referred to in this paper, I. craticula, 
Alder, is said to have been found off Jan Mayen (Lorenz), and 
Franz-Josef Land (Ridley), Kara Sea, Novaya Zemlya, West 
Greenland, and Davis Straits. J. Plemingit, Busk, from Jan 
Mayen and West Greenland. M. armifera from the Gulf of 
St. Lawrence. JZ. trifolium, 8S. Wood, from Jan Mayen. [MM 
cornigera, Busk, from Bear Island (Nordgaard). | 
19. Cripritina PuNcTATA (Hassall). (Pl. 8. fig. 22.) 
Escharipora punctata, Smitt, “Krit. Fort.” 1867, p. 4, pl. xxiv. figs. 4-7. . 
The species brought back by the Jackson-Harmsworth 
Expedition is no doubt the species figured by Smitt, but it seems 
exceedingly doubtful if this is the same as the British species, 
and therefore I only refer to Smitt; and not having had the 
opportunity of examining many specimens of C. punctata I hesi- 
tate to give a new specific or varietal name, especially as the 
Franz-Josef Land specimens are very fragmentary and not 
sufficient for thorough examination. 
The difference consists in the very wide ovicell, which is often 
almost concealed; and although Hincks speaks of the ovicell being 
subject to considerable variation, the difference between this very 
wide ovicell and the rather narrow ovicell of the ordinary British 
form is so very great, that until the lmks have been carefully 
studied we may doubt the identity. 
It is mentioned as occurring off Jan Mayen, but as Lorenz 
does not give any particulars we cannot judge which form he had 
before him. 
This species is of considerable interest from the fact that it 
occurs of the same size and with the same characterson a specimen 
of Hornera lichenoides, Pout., said to be from lat. 74° §. and 
long. 172° E., 380 fath., and to have been dredged by Sir John 
Ross in his Antarctic expedition. Mr. Busk mentions and had 
named the Hornera and also a piece of Escharoides Sarsii, Smitt, 
from the same dredge; but the Cribrilina punctata, Tass., had not 
been determined or mentioned when Mr. Kirkpatrick kindly 
