96 MR. A. W. WATERS ON 
sent to me by Joliet, from Roscoff, as C. ramulosa there is a long 
spinous process beyond the mandible. 
This seems to be represented in the Southern hemisphere by 
the Cellepora Eatoniensis of Busk, since described by Julhen as 
Osthimosia eveza, Jul). 
Loc. British seas; Mediterranean. 
Jackson-Harmsworth Exp.: Lat. 77° 55' N., long. 55° 25’ E., 
115 fath.; lat. 77° 55’ N., long. 53° 16’ E., 180 fath.; 50 miles 
N.W. Cape Mary Harmsworth, 234 fath. 
57. CELLEPORA VENTRICOSA, Lorenz. (PI. 12. fig. 10.) 
Cellepora ventricosa, Lorenz, Bry. von Jan Mayen, p. 96, pl. vii. 
fir. 13. 
The zocecia of this species are much larger than those of 
C. incrassata, Smitt, and the two species can be distinguished by 
the naked eye. ‘The operculum is also longer, and the ovicell is 
narrow and imperforate. There are 21 tentacles. In the Cape 
Mary Harmsworth specimens I do not find any vicarious avicu- 
laria, nor does Lorenz mention any. 
Loc. Jan Mayen (Lorenz). 
Jackson-Harmsworth Exp.: off Cape Mary Harmsworth, 
53-93 fathoms. 
58. ReTEPoRA CELLULOSA (Z.). (PI. 12. figs. 8, 9.) 
Retepora cellulusa, Smitt, “ Krit. Fort.” 1867, pp. 35 & 2038, pl. xxviii, 
figs. 222-225; Waters, Medit. & New Zealand Retepore, Linn. Soc. 
Journ., Zool. vol. xxv. p. 259, pl. vi. figs. 17 & 20, pl. vii. fig. 12; 
Bidenkap, Bry. von Ost-Spitzbergen, Zool. Jahrb. vol. x. p. 630, 
From off Cape Mary Harmsworth there is a piece about 22 inches 
in diameter spreading out and forming a rather flat expansion. 
I am unable to find any oral spines, nor did Bidenkap find any 
in his Spitzbergen specimens, whereas they are readily found in 
the Mediterranean RP. cellulosa. Also the operculum does not 
widen towards the proximal border so much as in the Medi- 
terranean specimens. These differences are interesting, but are 
not thought to furnish sufficient ground for separation ; and it is 
curious that this species, common in the Arctic and the Medi- 
terranean, is not found off the British coasts. 
Loe. Spitzbergen, 19-35 fath., Greenland, Kara Sea, Norway, 
Adriatic, Naples, Capri, Rapallo, Villefranche-sur-Mer. 
Jackson-Harmsworth Exp.: off Cape Mary Harmsworth, 
53-93 fath. 
