330 Rey. T. Hincks’s Contributions towards a@ 
Ibid. (p. 68 sep.). 
Cellepora granum, sp. n- 
For synonyms see Miss Jelly’s ‘ Catalogue.’ 
Waters has remarked that this species is closely allied to 
Lagenipora spinulosa, Hincks, and L. lucida, H. There are 
no doubt points of resemblance, but the differences in the 
structure of the zocecium &c. are probably of sufficient 
importance to justify us in referring them to distinct genera. 
The first of these species (L. spinulosa) he considers to be 
probably identical with Cellepora bicornts, Busk*. I am 
indebted to Dr. Giinther’s courtesy for the opportunity of 
examining specimens of the latter from the ‘Challenger’ 
Collection, and I am inclined to think that they are distinct 
forms. One of the marked features of ZL. spinulosa is 
the strongly reticulated surface of the cells. They are com- 
pletely covered below the tubular peristome with rather 
large roundish foramina closed in by a silvery-white mem- 
brane and surrounded by a raised line, forming a distinct 
network over the cell-wall. This is the usual and. charac- 
teristic structure, though occasionally in certain states it may 
be more or less obscured. Of this there is no mention in 
Busk’s description of Cedlepora bicornis, nor is there a trace of 
it in the specimens which | have examined. A few large 
circular pores are present along the margin of the cell and 
sometimes round the orifice, 
The aviculiferous processes in C. bicornis, which are tall 
and stout, are placed at the front of the peristomial orifice 
(‘‘ preoral,”’ according to Busk), and above them are fre- 
quently two spinous processes; in L. spinulosa they rise on 
each side close to the upper margin, and immediately below 
the ocecium, when present. In this species the front margin 
of the orifice (peristomial) is elevated above the rest, some- 
what everted, plain or trimucronate; in C. bicornis it is 
usually sinuated between the aviculiferous processes +. 
The avicularium of this species is minute as compared 
with that of the ‘Challenger’ form. There are also differ- 
ences in the ocecium. ‘That of C. bicornis is small, globular, 
smooth and glossy, with a roundish foramen closed in b 
membrane (‘ fissure,” Busk) in front, surrounded by a raised 
line; while that of L. spinulosa is semicircular, usually 
placed far back, and often considerably below the oritice of 
* ‘Challenger’ Report, part 1, p. 202, pl. xxx. figs. 1 and 12. 
+ These processes appear to rise from ‘the primary orifice. 
