ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 763 



3. PedicelUna belgica van Beneden is synonymous with Barents ia 

 gracilis. 



•4. Barentsia benedeni (Foettinger), and B. gracilis (Sars), are 

 distinct. 



Pectinatella magnifica near Berlin.* — W. Kokler reports the 

 occurrence of large masses of this remarkable North American Bryozoon 

 in the " Tegeler-See," near Berlin. It has been previously found near 

 Spandau and in the Oder at Breslau. The statoblasts adhere very 

 readily with their minute thorns, and may be transported by birds. 

 Probably the transport from America was effected by ship. 



Rotifera. 



New Rotifera. f — Three new species from different parts of the 

 world are figured and described by C. F. Rousselet : Anurseopsis navicida, 

 from Lake Gregory in Ceylon ; Brackionus havanaensis, found in Plankton 

 collected in the Illinois River near Havana ; and Brackionus satanicus, 

 a remarkably shaped species found living in the Devil's Lake, North 

 Dakota. 



Claro Island Rotifera.j — In connection with the biological investi- 

 gation of this small island on the west coast of Ireland, C. F. Rousselet 

 has collected 109 species of Rotifera on the island and adjoining main- 

 land, of which 37 are new to Ireland. Some rather rare species are 

 noted, but no forms new to science were discovered. The author 

 remarks on the two distinct species : Proales parasita Ehrenberg (not 

 Gosse), and Hertwigia volvocicola Plate, usually found parasitic in the 

 spheres of Volvox globator. 



Echinoderma 



New European Crinoid.§ — Austin Howard Clark defines Antedon 

 adriatica sp. n. He finds that there are four perfectly distinct and 

 readily recognizable European species, two inhabiting the Atlantic 

 coasts of Europe, and two the southern shores east of the Straits of 

 Gibraltar. The first two are Antedon petasus (Diiben and Koren), 

 A. bifida (Pennant) ; one of the last two is A. mediterranea (Lamarck) ; 

 the fourth is A. .adriatica. The occurrence of four distinct species 

 throws light on the discrepant results of embryologists who worked 

 with what they accepted as one species, A. rosacea. According to the 

 author, Antedon is primarily an Indian Ocean genus, an intrusion into 

 the Atlantic area, like Leptometra. The area inhabited by it is marked 

 by a series of species, each phylogenetically more developed than its pre- 

 decessor, and the least specialized more advanced than the species of 

 Mastigometra, its modern representative in the Indian Ocean. 



Recent Crinoids of Australia.! — Austin Hobart Clark reports on the 

 Crinoid collections of the Australian Museum. There are 46 species known 



* Internat. Rev. Hvdrobiol., iv. (1911) Biol. Supp., pp. 6-7 (1 pi.). 

 + Journ. Quekett Micr. Club, xi. No. 68 (1911) pp. 161-4 (1 pi.). 

 % Proc. Roy. Irisb Acad., xxxi. pt. 51 (1911). 

 § Proc. U.S.Nat. Museum, xxxviii. (1911) pp. 329-33. 



|| Mem. Australian Museum, iv. (1911) Scientific Results ' Thetis' Expedition, 

 pt. 15, pp. 705-804. 



