611 
of Edinburgh, Session 1865 - 66 . 
The hard parts of the animal were densely calcareous, and the 
disc seemed quite solid. On the under surface was a bulky, soft 
mass, of a reddish-brown hue, which covered the central disc, and 
extended outwards over the bases of the arms. Microscopically 
this consisted of a rich cellulo-granular structure, that might have 
been the debris of ova. The mass readily separated from the 
under surface of the body and arms, but left a membranous coat- 
ing which adhered very closely to the edges of the limbs, so that it 
seemed a fixed process. In this tough, translucent membrane were 
many minute calcareous scales, with a concentric structure, like 
those of a cycloid fish. The oral surface, after removal of the soft 
mass, had a wide circular opening, with several tooth-like pro- 
cesses projecting inwards from the circumference. 
Imbedded in the soft mass last mentioned, and partly projecting 
outwards, was a curious crustacean parasite, of a 
mottled crimson colour, when fresh (fig. 5). 
The occurrence of Synapta Galliennii (Hera 
path),* a species hitherto only procured from 
Guernsey, is interesting, and shows how cau- 
tiously deductions as to the distribution of 
marine animals ought to be made. Some of the 
specimens, though imperfect, measured between 
2 and 3 inches, of a pale pinkish or flesh colour, 
clouded by the dark intestine. Interspersed 
amongst the spicula were numerous circular, 
papilliform, grained rings of a brownish-red 
colour. The specimens agreed in most respects 
with Dr HerapatlTs description, but the anchors 
and anchor plates seem to be more than ser- 
rated,” since both are studded over with groups 
of microscopic spikes and granules, which impart to them a rough, 
corroded aspect, very characteristic when compared with the suc- 
ceeding species or S. digitata. 
Synapta Bushiif new sp.- — Two, about an inch in length, were 
dredged (nine to ten fathoms) on a bottom of muddy clay in Loch- 
* Quart. Jour. Micros. Soc., January 1865. 
t Named after Professor G. Busk, Loudon. 
