460 SUMMARY OF CURRENT RESEARCHES RELATING TO 



British Actinians.* — Charles L. Walton discusses the occurrence of 

 Sagartia In eke. Verrill at Plymouth. It was found on the American 

 coast about 1892, and in Plymouth Docks in 1896, and it may be that it 

 was introduced into both areas about the same time. The author makes 

 some interesting notes on Sagartiidae and Zoanthidae from Plymouth, and 

 in another paper t he reports on fourteen species collected by the ' Huxley ' 

 in the North Sea in the summer of 1907. 



Porifera. 



Inclusion of Foreign Bodies by Sponges.:}: — Igerna B. J. Sollas 

 describes Migas porphyrion g. et sp. n. from Mozambique, an interest- 

 ing Monaxonid whose skeleton consists of foreign bodies as well as 

 " proper " spicules. Reasons are given for believing that the inclusion 

 of sand-grains is due to the activity of small granular amcebocytes on 

 the cortex. Other cases — Euspongia officinalis var. rotunda and 

 Tedania commixta — are discussed. In the former the cells of the free 

 surface, in the latter those of the basal surface appear to engulf foreign 

 matter. 



Protozoa. 



Rhizopods and Heliozoa of the Netherlands. § — H. R. Hoogenraad 

 gives a faunistic account, including over fifty species of Amoeba, Vam- 

 pyrella, Arcella, Diffiugia, Quadrula, Raphidiophrgs, etc. 



Rhizopods from G-ough Island. || — James Murray reports that a 

 small tuft of moss brought from Gough Island by the ' Scotia ' Expe- 

 dition harboured Heliopera petricola Leidy, var. amethystea Penard, 

 Euglypha ciliata Ehr., another species of Euglypha, and a species of 

 Diffiugia. 



Protozoa of Sandusky Bay. If — F. L. Landacre gives a faunistic list 

 of the Protozoa collected in or near this bay (Lake Erie). The locality 

 is very rich in Infusoria and Mastigophora, and the list is a long one. 

 The bibliography of papers dealing with North American Protozoa will 

 be found useful. 



Studies on Colpoda.** — P. Enriques discusses various species of this 

 genus, distinguishing Colpoda cucullus 0. F. Midler, G. maupasi sp. n., 

 and G. steini Maupas emend. He also deals with some structural 

 features, e.g. the buccal appendage, which turns out to consist of distinct 

 cilia, not of a continuous membranella. 



Regeneration in Ceratium.ff — C. A. Kofoid finds that in Dino- 

 flagellate genera, such as Ceratium, in which the theca is shared between 



* Journ. Marine Biol. Assoc, viii. (1908) pp. 217-14. 



t Tom. cit., pp. 215-26. 



% Ann. Nat. Hist., ser. 8, i. (1908) pp. 395-401 (5 figs.). 



§ Tydschr. Nederland. Dierk. Ver., x. (1908) pp. 384-424. 



|| Proc. Roy. Phys. Soc. Edinburgh, xvii. (1908) pp. 127-9. 



i Proc. Ohio Acad. Sci., iv. (1908) pp. 421-72. 



** Arch. Zool. Exper., viii. (1908) Notes et Revue, No. 1. pp. i.-xv. (10 figs.). 



ft Univ. California Publications (Zoology) iv. (1908) pp. 345-86 (33 figs.). 



