586 SUMMARY OF CURRENT RESEARCHES RELATING TO 



An examination of the axopodia of Actinosphserium confirms the con- 

 clusion that contraction may take place in a definite direction in the 

 absence of doubly refractive particles. 



Foraminifera from Hawaiian Islands.* — R. M. Bagg,- Jr., reports 

 on a collection of over 200 species, including the following new ones : — 

 Gaudryina quadrangular is, Bolivina semi-alata, Bigenerina arenacea, 

 Sagraina irregularis, and Pulvinulina gilberti. 



Dimorphism of Ophryodendron.t — C. H.Martin finds that Oplvryo- 

 dendron abietinum is a true ectoparasite of the hydroid to which it is 

 attached, and its contained nematocysts are derived from its host. The 

 same is true of 0. sertulariee. The genus shows true dimorphism. A 

 proboscidiform individual gives rise by a process of external budding to 

 a vermiform individual of quite different structure. Both forms can 

 give rise to ciliate embryos. The ciliated embryos of the proboscidiform 

 develop on fixation into young proboscidiform individuals. It is probable 

 that the ciliate embryos of the vermiform individuals also develop into 

 proboscidiform individuals. 



Parasites of Fishes 4 — J. Fiebiger describes a number of ecto- 

 parasitic and endoparasitic Protozoa. Among Ciliata he discusses 

 Ghilodon cyprini Moroff from carp, the very beautiful Cydochsete 

 domerguei from carp and eel, and Idithyophthirius multiftliis, which is 

 readily visible with the unaided eye. Among Flagellates he discusses 

 Costia necatrix from sea-trout and Trypanosomes in carp. Among 

 Sporozoa he deals with numerous forms, e.g. Eimeria subepithelialis from 

 carp, Goussia gadi sp. n. from the swim-bladder of Gadus virens, Lento- 

 spora cerebralis Plehn in larval trout. 



Amoebidium in Larvae of Simulium.§ — E. Chatton and E. Roubaud 

 describe from the rectum of the larvae of Simulium argyreatum and 

 S. fasciatum a representative of the genus Amoebidium, which is mor- 

 phologically identical with A. recticola found in Daphnia magna and 

 D. pulex. 



New Hsematozoon from Sloth. |] — F. Mesnil and E. Brimont 

 describe Endotrypanum schaudinni g. et sp. n. from the blood of 

 Choloepus didactylvs. It is an intracellular parasite, elongated like 

 a Haemogregarine, probably occupying a position somewhat like that 

 of Leishmania, between Trypanosomes and the Haemocytozoa. 



Haemogregarines of East Africa. f — G. Bouet gives preliminary 

 descriptions of a large number of Haemogregarines which he has 

 observed in a tortoise (Stem other us derbianus), a lizard (Varanus 

 arenarius), pythons and some other snakes, and a toad. 



* Proc. U.S. Nat. Museum, xxxiv. (1908) pp. 113-72 (1 pi.). 

 t Quart. Journ. Micr. Sci., liii. (1909) pp. 629-64 (6 figs.). 

 X Verh. Zool. Bot. Ges. Wien, lix. (1909) pp. 32-48 (12 figs.). 

 § C.B, Soc. Biol. Paris, lxvi. (1909) pp. 701-3. 

 || Op. cit., lxv. (1908) pp. 581-3 (6 figs.). 

 1 Op. cit., lxvi. (1909) pp. 741-3. 



