184 SUMMARY OF CURRENT RESEARCHES RELATING TO 



zoospores (? gametes) of D. Versluysii and D. favulosa. The author 

 concludes with a short criticism on the work of Derschau and Lewitski 

 on mitochondria. 



AlgSB on Marine Birds.* — C. Lindner cites a passage written by 

 C. Bolle t with reference to the Mediterranean Cormorant {Phalsero- 

 corax Desmaresti)^ a young specimen of which was found to have the 

 feathers of its back, shoulders and tail stained with a green substance 

 which was proved by P. Savi to consist of an Ulvaceous alga. The 

 microscopic structure of the alga was briefly described, and the name 

 Ulva involvens proposed. But the proper systematic position of the alga 

 remains a matter of doubt and requires investigation. Lindner suggests 

 that the reported luminosity of some owls may be due to micro-organisms. 



Melobesiese of the Charcot Expedition.! — Madame Lemoine 

 reports on the Melobesie^ collected during the Charcot Expedition of 

 1908-10. Five species are known in Antarctic regions, of which one 

 is new and widely distributed. It represents in the Antarctic the 

 group with no hypothallus. All occur in the littoral zone, except 

 Lithothamnium Lenormandi, which has been dredged from 50 m. 

 Four species are common to the west coast of Graham's Land and Tierra 

 del Fuego ; and two to Graham's Land and South Orkneys. 



Guerinia.§ — C. A. Picquenard gives a description of Guerinia, a 

 new genus of Floridese allied to Rhodochortoti or to Schmitziella, and 

 founded on a species instituted by the Crouan brothers under the name 

 Hapalidium caUithamnioides. 



Oceanic Alg8e.|l — A. Mazza continues his studies of oceanic algology 

 and discusses the structure and morphology of the following genera : — 

 Microdadia (4 species), Campylsephora (1), Rho do chorion (2), Thamno- 

 carpns (1). These genera belong to the Ceramiacese. 



v^Coloration of Floridese.f — H. Kylin writes on the green and 

 yellow colouring matters of Florideae. Discussing chlorophyll and its 

 relation to phycoerythrin, he states that after examination of Geramium 

 rubrum he finds the green colouring matter contains magnesium and 

 therefore is true chlorophyll in the sense of Willstatter. He considers 

 that chlorophyll and phycoerythrin in living chromatophores of 

 Florideae are two independent colouring matters occurring together and 

 not chemically connected with one another. As regards the yellow 

 colouring matter, the author proves the presence of carotin in a number 

 of species of which he gives a list. In G. rubrum carotin was shown 

 macrochemically, as well as xanthophyll and another allied yellow matter. 

 L. Marchlewski ** criticizes the work of Kylin, and makes suggestions 

 as to methods of investigation. 



* Irish Naturalist, xxi. (1912) pp. 52-3. 

 t Journ. f. Ornithologie, xiii. (1865) pp. 419-20. 

 i Comptes Eendus, cliv. (1912) pp. 1432-4. 



§ Trav. Sci. Lab. Zool. Phys. Marit. Concarneau, iv. fasc. 3 (1912) 5 pp. (2 pis.). 

 II Nuov. Notar., xxiv. (1913) pp. 1-22. 

 i Zeitschr. Phys. Cheraie, Ixxiv. (1911) pp. 105-22. 

 ** Zeitschr. Phys. Chemie, Ixxv. (1911) p. 272. 



