464 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
tained the parasites in question, while among seventeen salmon from the 
Baltic, four were infected. As to B. latus the author has found its 
larvze in Trutta lacustris , perch, and pike. 
5. Incertse Sedis. 
Indian Rotifers.* — Mr. H. H. Anderson gives a first account of 
the species of Rotifers he has been able to find in the Calcutta tanks, 
and enumerates forty-seven, several of which are new. He looks, 
however, on this list as a mere instalment, for the weedy tanks teem with 
Rotifers. Floscularia unilobata, CEchistes [sic] stephanion , which differs 
from most of its congeners in having a very small corona, Rotifer mento , 
which seems to inhabit a tube, Actinurus ovatus, which does not possess 
all the generic characters ascribed to Actinurus by Dr. Hudson and 
Mr. Gosse, Stephanops dichthaspis, Metopidia torquata , M. angulata , 
Pterodina intermedia , BracJiionus longipes and B. bidentata are the new 
species. Of the last but one, we are told that the foot is of extraordinary 
length, for in a dead specimen in which the lorica measured 1/100”, the 
foot, which was wrinkled, measured 1/75” ; in living specimens the foot 
is often extended so as to be three times as long as the lorica. 
Three new Rotifers.]* — Mr. A. Pell states that, during the past 
winter, he found seventy species of Rotifers, sixty-four of which he was 
able to identify with forms described by Dr. Hudson and Mr. Gosse ; 
three he was uncertain about, and three appear to be undescribed. 
Mastigocerca bicuspes is easily distinguished by the two spines on the 
back, one on each side of the median line of the body ; it resembles M. 
carinata , but the ridge continues almost to the foot. The body is 
1/200” long, and the height of the body and ridge 1/300". Cathypna 
Stolcesii is easily distinguished by the two flattened points which terminate 
the lorica ; it is not so broadly ovate as C. luna , and it has spines which 
are a continuation of the dorsal plate. It is 1/144" long. Copeus 
americanus has a general resemblance to C. labiatus, but is distinguished 
from it by the absence of the large lip ; it is more slender than that 
species, and it is 1/50" in length. 
Echinodermata. 
British Deep-sea Echinoderms.J — Prof. F. Jeffrey Bell has a note on 
some Echinoderms collected in deep water off the S.T7. coast of Ireland, 
supplementary to his report already published.§ The most noticeable 
fact in this collection is the extension of the depths at which some of 
the more common shallow-water species — such as Asterias rubens, A. 
giacialis, Sticiiaster roseus , and Spatangus purpureus — were found. 
Coelenterata. 
Actinida of North Sea.|j — The latest of the beautifully illustrated 
reports on the Zoology of the Norwegian North Sea Expedition is one 
* Joum. Asiat. Soc. Bengal, lviii. (1889) pp. 345-58 (3 pis.). 
t Microscope, x. (1890) pp. 143-5 (3 figs.). 
% Joum. Marine Biol. Assoc., i. (1890) pp. 324-6. § Ante, p. 44. 
|| ‘Den Norske Nordhavs Expedition, 1 1876-8, xix. (Zoologi) 1890, 184 pp., 
25 pis., 1 map. 
