258 QUARTERLY CHRONICLE. 
Among the miscellaneous extracts and notices at the end 
of Robins’s Journal, we would draw attention to— 
‘“‘ Hematozoa found in the right Heart of a Dog,’ by M. 
Collas. —It appears that the dog in question fell down dead, 
when a post-mortem showed a mass of entozoa, fourteen to 
fifteen in number, packed together in the right ventricle, 
auricle, and pulmonary artery. The largest was 230 mm. 
in length. When the worms were crushed, little worms 
came out from them 72 mm. in length, very fine and thread- 
like. The parasite appears to be the Pseudalius filum of 
Dujardin, common in the Porpoise. 
“ On the Action exercised by Electricity on the Noctiluca 
miliaris,’ by MM. Ch. Robin and Ch, Legros.—In the 
first place, the authors feel satisfied that the phosphor- 
escence exhibited by Noctiluca is not localised at any 
particular spot, but is exhibited at the centre of irritation. 
If the irritation is increased, the phosphorescence becomes 
general. A current of electricity was made to pass through 
a vessel containing Noctiluca. The effect produced was a 
line of phosphorescent Noctiluce between the poles of the 
battery used, the phosphorescence ceasing and recurring 
with the making and breaking of the electric circle. 
ENGLAND.—Annals and Magazine of Natural History. 
July.—* On the Affinities of Peridinium Cypripedium, Jas. 
Clk., and Urocentrum Turbo, Ehr.,” by Prof. H. James Clark, 
A.B., B.S., Soe. Am. Acad.—In this paper Mr. Clark replies 
to an attack upon his identification of Peridinium, lately 
made by Mr. Carter in the ‘Annals.’ An abstract of the 
original paper was given in these pages. 
“On the Rhabdocela,” by HK. Mecznikow.—This is a 
translation, by Mr. Dallas, of an interesting paper by this 
hard-working observer. In the first part of his paper he 
discusses the reproductive organs of Prostomum, describes a 
new species, P. Heligolandicum, and states that he met with 
Claparéde’s P. Caledonicum in Heligoland. Secondly, he 
briefly describes a marine species of Acmostomum, a genus 
established by Schmarda on two North American brackish- 
water forms. Thirdly, he describes a remarkable Turbellarian 
allied to the Alaurina prolifera of Busch, once found at 
Malaga, and similar also to a form described by Claparéde as 
a larval Turbellarian occurring on the Scottish coasts. Both 
these animals were sexless. Herr Mecznikow’s specimens 
were composed of four parts, the foremost being longest, the 
total length of the animal being 14 mm. The anterior 
part was furnished with a tactile proboscis, differing in 
colour from the body, and in the absence of the fine coat of 
