IV. Pisces für 1906. l5 



l'expedition Antarctique national ecossaise. Ebenda p. 172 — 182. — 

 Ref. in: Journ. R. Micr. Soc. 1906. 1906 p. 662. 



Doppeliiiair, G. €!. Über die biologische Station der Fischzucht- 

 anstalt Nikolisk. In: Trav. Soc. nat. St. Petersbourg, 37. p. 226—30. 

 [Russisch.] 



Drzewina, Auna. Modifications des leucocytes acidophiles chez 

 certains Teleosteens marins sourais ä des variations de salure. In: 

 C.-R. Soc. biol. Paris 60. p. 167—8. — Ref. von J. Tandler in: 

 Zoolog. Jahresber. 1906, Vert. p. 224. 



Drüuer, L. Die Kiemenbögen der Wirbeltiere und ihre Abkömm- 

 linge. In: Ber. Senckenb. Gesellsch. 1906. p. 6 — 10. 



Behandelt die Morphologie der Kiemenbögen des Wirbeltierstamms 

 von den Selachiern bis zu den Säugetieren und führt den Vergleich 

 an dem Bau des Skelets, der Muskeln und Nerven bei den Haien, 

 Schwanzlurchen und Säugetieren durch. Die enge Zusammengehörigkeit 

 der Selachier, Urodelen u. Säugetiere auf diesem Gebiete wird hervor- 

 gehoben. Skelet und Gefäßsystem sind den entwicklungsgeschichtlichen 

 Befunden im Bereiche des Nervensystems unterzuordnen. 



Dubuisson, H. Contribution ä l'etude du vitellus. In: Arch. zool. 

 exper. (4) 5. p. 153—402. T. 5—9. 



Duges, A. Role des nageoires chez les Poissons. In: Mem. Soc. 

 „Ant. Alzate" 22. 1905. p. 217— 20. — Auch in: Bull. Soc. zool. 

 France, 30. p. 107—110. 



Durnford, C. D. (I). Flying-fish flight and an unfixed law of nature. 

 In: Amer. Natur. 40. p. 1 — 11. Auch in: Ann. Mag. Nat. Hist. 17. 

 p. 158—167. — Ref. in: Zoolog. Jahresber. 1906, Vert. p. 99. und in: 

 Journ. R. Micr. Soc. 1906. p. 293. 



Verfasserresume : ,,1. That flying-fish would require to have a 

 wing-area several, and probably many times greater, according to 

 their weights, than they actually possess to enable them to accomplish 

 sailing flight in even such a restricted form as that carried out by 

 saiUng birds. 2. That we know of no parallel case in nature which 

 would justify the assumption that the possession by these fishes of 

 even such increased wing-area would of necessity enable them to sail 

 long distances — (a) horizontally, or (b) close to an obstruction (the sea), 

 or (c) in defiance of the direction of the wind ; much less all three (a), 

 (b) and (c) combined, as they commonly fly. 3. That their common 

 flight is exactly what is to be expected of flyers holding, as they do, 

 a very low wing to weight ratio — flyers capable of and of necessity 

 employing, extreme wingspeed." 



— (3). The flying-fish problem. In: Ann. Mag. Nat. Hist. 18. 

 p. 327—38. 



,,1. The tail-impelled, visibly (to many) wing-assisted jump from 

 the water to a hight, where the wings can work freely. 2. The flight 

 continued by an intensely rapid and laboured wing-movement — one 

 easily mistaken for stillness, and usually seen, if at all, as blurr. 3. Short 

 periods of slowing down of wing-speed, during which the wing-move- 

 ment becomes again visible. These periods often precede a special 



