546 REPORT-—1885. 
zocecium into an upper and lower chamber by the interposition of a 
calcareous lamina beneath the membranous front wall.’ But Mr. Hincks 
says that he is unable to follow Dr. Jullien in his proposed distribution 
of the Cheilostomata into two principal groups, characterised by the 
presence or absence of this double ectocyst. . . . There is room, however, 
for a fuller investigation of its history and meaning. 
After duly considering the question raised by Dr. Jullien, Mr. Hincks 
believes that there are at least two distinct generic types—there may be 
more—and these are represented by the species given below :— 
Genus. Steganoporella. 
Steganoporella magnilabris, Busk (see ante). 
Genus. Smittipora, J. Jullien. 
Smittipora abyssicola, Smutt. 
Tat one time referred the above species to Setosella (mihi), but the 
British species (S. vulnerata), for which this genus was founded, does not 
possess the dithalamic cell. 
Two species, formerly described as Stegunoporella, are now referred to 
Micropora. 
Genus 41. Caleschara Macgillivray. 
(See Busk, ‘Chal. Rep.’ p. 76.) 
‘ Zoarium polymorphous ; erect, foliaceous, and contorted, or composed 
of ligulate branches and bilaminar, or decurrent and incrusting. Zocecial 
area pyriform ; the margin very thick and bevelled off to a considerable 
depth, so as to leave a very contracted elliptical aperture, at first mem- 
branous, but eventually occupied in the lower two-thirds by a calcareous 
lamina attached below to the bottom of the aperture, and above by a 
broad band on each side, and leaving on either side an elongated fissure. 
The upper third above the lamina represents the internal or secondary 
orifice. In the natural state the entire area is filled in by a rather thick 
epithecal membrane, in which alone is seated the semicircular or sub- 
crescentic operculum. Fertile cells distinguished by their greater width.’ 
—COhal. Rep. pp. 76 and 77. 
Caleschara denticulata (?) var. tenuis, Busk. 
‘Chal. Rep.’ p. xxi. fig. 9. 
See Hincks, ‘Ann. Mag. Nat. Hist.’ Feb. 1881, p. 152, pl. viii. fig. 2. 
Genus 42. Diplopora, Macgillivray. 
‘Zoarium incrusting; cells occupied by a calcareous membrane in 
front, and divided into two parts, the posterior half being very much 
elevated ; a narrow transverse portion a little distance behind the month, 
and in front of the elevated part, deficient in calcareous matter and 
entirely membranous.’—Macgillivray, Proceed. Roy. Soc, Victoria. Diplo- 
pora cincta (Hutton’s sp.). Loc. : Queenscliffe ; Portland (Mapleston). 
This is the Membranipora cincta of Hutton, and is the same species 
that has been described as Membranipora transversa by Mr. Hincks. 
