70 t MR. A. W. WATERS ON 
and the aperture has the lower edge nearly straight, so that the 
operculum is similar to that of the ovicelligerous zocecia of 
Hippothoa hyalina, L. All the specimens from Elmwood were 
dry, and there was no material for cutting sections. The H. di- 
varicata has the aperture of the ovicelligerous and ordinary 
zocecia similar, both having a broad sinus. 
Loc. Gulf of St. Lawrence, Labrador, Maine, Queen Char- 
lotte Islands ; Greenland, 57 fath. ; Shetland, 100 fath. 
Jackson-Harmsworth Exp.: off Elmwood, 18 fath. 
27. Hippotuoa HyatiIna, LZ. (PI. 8. figs. 16-18.) 
Mollia hyalina, forma hyalina, Smitt, “ Krit. Fort.” 1867, p. 16, pl. xxv- 
fies. 84,85. Compare list of synonyms in Hincks’s Brit. Mar. Poly. p. 271, 
and Miss Jelly’s Catalogue. 
Norman * considers this should be placed in the genus Celle- 
porella of Gray, and states that it was the only species in the 
genus as described by Gray, and that therefore the genus Dia- 
zeuxta of Jullien is merely a synonym. It would be unfortunate 
if the laws of priority obliged us to put the latter under Celle- 
porella, as it has been used in another sense by both Hincks and 
Norman. 
However, the reasons for separating Diazeuawia from Schizo- 
porella are based upon the reproductive characters mentioned 
by Jullien. The female zoccia carrying the ovicell are usually 
very short, and according to Jullien possess no polypide. I have, 
however, some specimens in which these zocecia are about the 
same size as the others. There are also very minute zoecial cells 
with very small opercula (fig. 16), which Jullien says are male: 
zoccia without polypides; and these may occur on the front 
of an ordinary zoccium, as in specimens from California, or 
there may be one at each side of the aperture, or they may occur 
scattered between other zocecia. 
Hippothoa has usually short ovicelligerous zocecia ; and if we 
are to attach most weight to the reproductive organs, then there 
seems little doubt that the right place for this species is Hippothoa. 
The shape of the aperture of the ordinary zocecia is similar 
throughout the genus. Jullien considers that larval peculiarities 
and other characters justify this being placed in a family Dza- 
zeuxide, and probably family distinction may have to be made.. 
The small specimens available have not been sufficient for cutting 
satisfactory sections. 
* Ann. & Mag. Nat. Hist. ser. 6, vol. xiii. p. 129. 
