470 SUMMARY OF CURRENT RESEARCHES RELATING TO 



from the pr^-abdomen. The miuute structure and the development of 

 the organs are dealt with. 



After an injection of an emulsion of Chinese ink into the general 

 cavity, the ]iarticles are found first in the lymphatic gland and in the 

 lymphoid organ. The ink is carried in the plasma of the blood and in 

 the leucocytes. The hyaline leucocytes, the fundamental elements of 

 the lymphatic gland, show a very marked phagocytic capacity, and there 

 is considerable phagocytosis, which the author discusses, in various parts 

 of the bodv. 



«• Crustacea. 



Inheritance of Eye-Colour in Gammarus chevreuxi.* — E. AV. 

 Sexton and ]M. B. Wing have made observations on 21,514 specimens 

 of this Amphipod. The normal eye-colour is black, with a superficial 

 reticulation of opaque white pigment. The pigmentation is very 

 variable within limits. Eyes have been observed either partially or 

 entirely lacking in the coloured pigment of the retinular cells, or with 

 either a partial or an entire lack, or else an excess of the opaque white 

 pigment. 



A red strain arose as a " sport " in the second generation of off- 

 spring of the first animals captured. No red-eyed forms have been 

 found in many thousands of specimens in natural conditions, nor has 

 the strain heen got again from the Pure Black. The red colour is not 

 a sex-limited character ; about as many males as females come to 

 maturity. Over 4000 red-eyed individuals were examined. 



The inheritance of the coloured pigment of the eye is Mendehan. 

 Black is dormant and Red recessive. The dominants are divided into 

 Pure Black and Impure or Hybrid Black. The- Pure Dominants and 

 the Recessives breed true through all generations. An absence or 

 diminution of the white pigment and of the coloured pigment was also 

 studied. The breeding together of animals from different generations 

 gives the same results as regards proportions of colours as the breeding 

 together in tlie same generation. 



■'tj 



Hepatopancreatic Secretion of Crayfish.j — CI. Gautier has studied 

 the properties of this fluid in the fresh-water crayfish, and finds that it 

 has an anti-coagulant efficiency. It is able to hinder the coagulation 

 of the fibrinogen of the plasma (of the horse's blood) by the serum of 

 the same. That implies that the hepatopancreatic secretion blocks the 

 action of the thrombine in the serum. 



Australia Cirripedea.J — Hjalmar Broch reports on a number of 

 Cirripedes collected by Mjoberg on the Swedish Scientific Expedition to 

 AnstraHa (1910-13). The collection includes Balanus mjohergi sp. n., 

 growing embedded in a Muriceid colony ; B .{?)fiUgranus sp. n., which 



* Journ. Mar. Biol. Assoc, xi. (1916) pp. 18-50 (1 pi.). 



t C.R. Soe. Biol. Paris, Ixxviii. (1915) pp. 732-4. 



% K. Svensk. Vetensk. Handliugar, lii. No. 8 (1916) pp. 3-16 (2 pis. and 2 figs.) 



