MUSEUM OF COMPARATIVE ZOOLOGY. 41 



Memoirs: — 



Vol. XL. 



No. 9. Studies from the Newport Marine Laboratory. XVI. The 

 development of osseous fishes. II. The pre-embryonic stages of de- 

 velopment. Part 2. — The history of the egg: cleavage, formation of 

 the periblast, and development of the germ ring. By Alexander Agassiz 

 and C. O. Whitman, pp. 6. 11 plates. April, 1915. 



Vol. XLII. 



Reports on the scientific results of the expedition to the Eastern Tropical 

 Pacific, in charge of Alexander Agassiz, by the U. S. Fish Commission 

 Steamer "Albatross," from October, 1904, to March, 1905, Lieut. Com- 

 mander L. M. Garrett, U. S. N., commanding, and of other expeditions 

 of the "Albatross," 1891-1899. XXIX. The sponges. 3. Hexactinel- 

 lida. By Robert von Lendenfeld. pp. 397. 109 plates. June, 1915. 



Report: — 



1913-1914. pp. 51. December, 1914. 



Zoological Laboratory. 

 Contributions : — 

 250. Crozier, W. J. — The growth of the shell in the lamellibranch 



Dosinia discus (Reeve). Zool. jahrb., Abt.f. anat., December, 



1914, 38, p. 577-584, pi. 35. 



252. Patten, B. M. — A quantitative determination of the orienting 



reaction of the blowfly larva (Calliphora erythrocephala 

 Meigen). Journ. exper. zool., August [September], 1914, 17, 

 p. 213-280. 



253. Rand, H. W. — Wound closure in actinian tentacles with refer- 



ence to the problem of organization. Arch. f. entwicklungs- 

 mechanik, January, 1915, 41, p. 159-214. 



254. Arey, L. B. — An abnormality in the intestine of Necturus 



maculosus Raf. Anal, record, November, 1914, 8, p. 493-498. 



255. Crozier, W. J. — The orientation of a holothurian by light. 



Amer. journ. physiol., December, 1914, 36, p. 8-20. 



256. Crozier, W. J. — On the number of rays in Asterias tenuispina 



Lamk. at Bermuda. Amer. nat., January, 1915, 49, p. 28-36. 



257. Robertson, W. R. B. — Chromosome studies. III. Inequali- 



ties and deficiencies in homologous chromosomes: their 

 bearing upon synapsis and the loss of unit characters. .Journ. 

 morphol, March, 1915, 26, p. 109-141, 3 pis. 



258. Crozier, W. J. — A note on the physiology of the ( uvierian 



organs of Holothuria captiva Ludw. Amer. journ. yky9vol. % 

 January, 1915, 36, p. 190-202. 



259. Arey, L. B. — The orientation of Amphioxus during locomo- 



tion. Journ. exper. Zoo!., July, 1915, 19, p. 37-44. 

 261. Seep. 40. Bull. 59, no. 2. 



