ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 359 



collected at low tide. The collection includes eight species, one of 

 which, Astronwricea stellifera, is new. There is also a new variety of a 

 remarkable species of Echinomuricea, previously found in the Indian 

 Ocean. 



Hydroids of Behring Sea.* — E. Jaderholm reports on a number 

 of hydroids from Behring Sea, including Lafo'ea fruticosa, Halecium 

 telescopicum, Abietinaria gigantea, Grammaria immersa, and Selaginopsis 

 cylindrica. 



Autotomy of Hydranth of Tubularia.f — Max Morse finds that 

 colonies of T. crocea brought into aquaria lose their hydranths, which 

 are pinched off and disintegrate. New hydranths replace the old ones. 

 The influence of illumination, oxygenation, currents, etc., has been 

 studied, and the author finds that temperature seems to be the only 

 consistent factor involved in tbe decapitation. When the temperature 

 is kept about 10°-15° C. the hydranths are retained. 



Cladocarpus formosus.J— James Ritchie has a note on this rare 

 Plumularian, which Allman described in 1874, from the Faeroe Channel. 

 Fresh specimens have been obtained from the same place. Some 

 additional information and corrections of some details in Alhnan's 

 description are given. It is noted that " C.formosus" of the ' Challenger ' 

 Report, is really a variety of C. crenatus, and that C. crenulatus Levinsen 

 is the same as C.formosus. 



Protozoa. 



Wagnerella borealis.§ — Margarete Zuelzer has studied this interest- 

 ing type, with its conical base, long stalk, and spherical head. There 

 are minute crescent-shaped needles of silica in the rather rigid base 

 and stalk, and the same, along with large loosely connected needles in 

 the head. There are numerous needles in the protoplasm beneath the 

 delicate elastic pellicle. The pseudopodia stream out from the loose 

 framework of the head, and show great sensitiveness. In the centre of 

 the head there is a strongly refracting spherule, which can pass along 

 with the head protoplasm into the shelter of the stalk. There is 

 multiplication by fission, by budding, and by spores. Conjugation of 

 spores was not observed, but it probably occurs. There is an alterna- 

 tion of generations. 



Foraminifera of Woods Hole.|| — Joseph A. Cushman records 28 

 species in 16 genera. The shallow, sheltered area, with a bottom in 

 many parts of shifting sand, is not favourable to Foraminifera. Most 

 of the species are those which are common also in the littoral zone of 

 the European coast of the North Atlantic. 



* Archiv Zool., iv. (1908) No. 8, pp. 1-8 (2 pis.). 



t Biol. Bull., xvi. (1909) pp. 172-82 (2 figs.). 



% Ann. Nat. Hist., iii. (1909) pp. 310-14 (2 figs.). 



§ SB. Ges. Nat. Freunde Berlin, 1908. pp. 151-6 (1 pi.). 



|| Proc. Boston Soc. Nat. Hist., xxxiv. (1908) pp. 21-34 (1 pi.). 



