ON RECENT POLYZOA. 573. 
a. Bilaminar (escharan). 
1. Mucronella contorta, Busk, ‘Chal. Rep.’ pl. xx. fig. 9 
= Eschara id., Busk, ‘ Brit. Mus. Cat.’ p. 89, pl. eviii. 
figs. 1-3. 
2. - pyriformis, Busk, ‘ Chal. Rep.’ pl. xx. fig. 5. 
B. Unilaminar, erect or crustaceous, unattached (hemischaran). 
3. Mucronella quadrata, Busk, ‘Chal. Rep.’ pl. xviii. fig. 5; and 
pl. xvii. fig. 8. 
A. delicatula, Busk, ‘Chal. Rep.’ pl. xviii. fig. 2. 
5. a rostrigera, Busk, ‘Chal. Rep.’ pl. xix. fig. 2. 
6 bisinuata, Smtt, ‘Chal. Rep.’ pl xix. fig. 5 
= Escharella id., ‘ Florid. Bryozoa,’ p. 59. 
iA Ss castanea, Busk, ‘ Chal. Rep.’ pl. xix. fig. 6. 
8 35 magnifica, Busk, ‘ Chal. Rep.’ pl. xviii. fig. 3. 
y. Adnate (lepralian). 
= 
Mucronella canalifera, Busk, ‘Chal. Rep.’ pl. xxii. fig. 2. 
? Phylactella (sp.) 
= Lepralia Mangueville, Busk, ‘Quart. Jour. Micr. 
Soc.’ vol. xiii. p. 284. This form differs from 
Lepralia (Phylactella) labrosa, and also from L. 
(Phylactella) collaris—in the one case in the absence 
of an internal denticle, and in the other in the 
presence of oral spines and the absence of punctu- 
ration on the ocecium. 
f tricuspis, Hincks, ‘Chal. Rep.’ pl. xxii. fig.3; and 
Hincks, ‘ Ann. Mag. Nat. Hist.’ 1881. 
% simplicissima, Busk, ‘Chal. Rep.’ pl. xxii, fig. 5. 
Probably an adnate variety of No. 2. 
4 ventricosa, Busk (Lepralia id., 1861, var. multispinata, 
Busk) 
=(?) Mucronella Peachii, var. octodentata, Hincks, 
‘Brit. Mar. Polyzoa.’ 
I think it best to give, in addition to the above, the Mucronelle as 
worked out by Mr. Hincks both in his ‘ British Marine Polyzoa’ and also. 
in his ‘ Contributions.’ 
The genus Mucronella ‘is equivalent in part to the Discopora of Smitt, 
but not of Fleming, who originated the name for a species belonging to a 
totally different section of the Polyzoa (the Cyclostomata), with which it 
is still connected in the slightly modified form Discoporella.’—Hincks,. 
‘Brit. Maz. Polyzoa,’ p. 360. 
a. Without avicularia. 
13. Mucronella Peachii, Johnst. (‘Brit. Mar. Polyzoa,’ p. 360, pl. 1. 
figs. 1-5; pl. li. figs. 1, 2). 
Var. a, labiosa, Busk, pl. li. fig. 1. Loc.: Belfast Bay ; 
Guernsey. 
wer 3, octodentata, Norman, pl. li. fig. 2. Loc. : Shet- 
and. 
