1897-98. The Upper Elf Loch, Braids. | 373 
the Beautiful Floscule (Floscularia ornata); two of the Tube- 
dwelling Rotifers (Melicerta ringens and M. tubicolaria); and 
what has been described as “ perhaps the most beautiful of all 
the rotifers,’ Stephanoceros Hichhornii—a very rare rotiferon 
in Scotland. The 2nd order, the Sdelloida, has been increased 
‘by seven species; whilst the 3rd order, the Plotma,—the 
largest of all,—has had no fewer than sixty-six species added 
to it—making in all a record of ninety-seven species. Though 
none of these species are new to science, several of them are 
very rare. We are much indebted to Mr John Hood for his 
invaluable aid in the identification of the Rotifera,—a group 
with which he is so well acquainted. We have been favoured 
with the following notes by Mr Hood on three of the species 
enumerated in our list. The first refers to Euchlanis pro- 
patula (No. 48 of list), regarding which Mr Hood writes as 
follows :— 
Mr Gosse was the first to describe this species (in ‘The Rotifera, or 
Wheel-Animalcules,’ vol. ii. p. 87), by the name of Diplois propatula, 
illustrated by two figures, a dorsal view and a lateral one. The dorsal 
view is a very good likeness of the creature, and a sufficient guide to its 
identity ; but, on the other hand, the lateral view is very unsatisfactory, 
and not at all like it. It has been subsequently described by Dr Burn and 
Mr Bryce at its proper place in the genus Euchlanis. Its generic characters 
are undoubtedly those of a Euchlanis. Its ventral plate is a little larger 
than the dorsal one, which is quite the reverse of all the other species of 
the genus; but, notwithstanding this, the jaws, internal organs, and foot 
are those of a Euchlanis. 
The next note refers to Salpina marina (No. 90 of list), 
which certainly calls for some explanation, as occurring here 
in a fresh-water loch. Mr Hood says :— 
Mr Gosse has doubtless erred, at p. 39 of the Supplement to his mono- 
graph on the Rotifera, in placing this as a marine rotifer. The only 
example he described from was a dead one he found in a tube of water 
from the Firth of Tay which I sent him in 1886, and which contained 
Notholea spinifera and a few other marine forms. I have no doubt this 
Salpina had been introduced accidentally into the tube by me—possibly 
it had been in the dipper when I filled the tube with marine forms. I have 
never myself found a Salpina in a marine habitat. 
The last note is on Triphylus lacustris, Huds. (Furcularia 
lacustris, Ehr.), (No. 97 of list), regarding which Mr Hood 
writes :— 
This species has only recently been found in Britain. Dr Hudson placed 
