18 XV. Ecln'nodermata (mit Einschluss der fossilen) für 1907. 



— (3). Some features in the behavior of the Starfisli. [Auszug]. 

 In: Science (2) 25. p. 726. 



(1). Inhalt: Introductory p. 56. Respiration and its protection by 

 the pedicellariae p. 59. Detailed behavior of the pedicellariae p. 64. 

 Capture of food p. 84. Behavior of the starfish in selecting the con- 

 ditions of existence p. 94. Reaction to light p. 102. Positive reactions 

 p. 113. The righting reaction p. 130. • Formation of habits in the 

 starfish p. 148. The unified Impulse and the determination of the 

 varied activities under its influence p. 169. — Als,,Concluding Statement" 

 sagt Verf. u. a. : „Perhaps the most important thing developed in the 

 paper is the demonstration of the variability, modifiability, unity 

 and adaptiveness in the main features of the behavior of thfe starfish. 

 The movements are shown to depend on the varying physiological 

 conditions of the animal, and the numerous factors, which demonstrably 

 modify the physiological condition, and therefore, the behavior, are 

 set forth in detail. Habit formation is demonstrated and discussed 

 in füll. The unity and coordination of much of the behavior is presented 

 and some theories of its nature and origin are discussed. Of subordinate 

 importance are the essentially new, correct accounts of the method of 

 locomotion and of the way in which the negative reactions occur." 



liiering, H. v. Archihelenis und Archinotis. Gesammelte Beiträge 

 zur Geschichte der neotropischen Region. Leipzig 1907. 350 pp. Fig. 

 Karte. 



Über Echinodermen nichts Besonderes. 



Jolmstone, J. The food of fishes. In: Trans. Proc. Liverpool 

 Biol. Soc. XXI. p. 316—327. 



Echinus, Holothuria und vor allen Dingen Ophiuroideen (darunter 

 Ophioglypha) zu wiederholten Malen in Fischmagen gefunden. 



Jordau, H. E. On the relation between nucleolus and chromosomes 

 in the maturing oocyte of Asterias forbesii. (Preliminary paper). In: 

 Anat. Anz. 31. p. 39 — 46. — Ausz. v. Ludwig in: Zoolog. Jahresber. 

 1907. p. 9. 



,,My results show conclusively that in this Echinoderm form, 

 at least, the chromosomes do not arise from out of the nucleolus. Fre- 

 quently the chromosome group is in such close superficial contact with 



the nucleolus as to give the appearance of a nucleolar origine The 



important point that seems to have escaped notice previously is that 

 however close or remote the relative position of the chromosomes 

 in the nucleus, the nucleolus always contributes chromatin to the 

 chromosomes by virtue of which the latter grow in size before entering 

 the polar spindle. . . . Nucleolar fragmentation occurs in an almost 

 infinite variety of ways The nucleolus is a störe house of nutri- 

 tive material . . . The reduced number of chromosomes is 18." 



Jordan, D. S. and Kellogg, V. L. Evolution and animal life; an 

 elementary discussion of facts, processes, laws and theories relating 

 to the life and evolution of animals. New York (Appleton), 1907. 

 XI + 489 pp., with col. front., illustr., col. pl. 



Joubin, L. Notes sur les gisements de Mollusques comestibles des 



