94 abstracts: zoology 



FORESTRY. — Eucalypts in Florida. Raphael Zon. Forest Service 

 Bulletin No. 87. Pp. 47, with plates. 191 1. 



Next to southern California, Florida promises most for the growing of 

 eucalypts in the United States. The region in Florida in which eucalypts 

 can be successfully grown may be roughly denned as the orange belt, 

 about 40 per cent of the total area of the State. In all, about 16 species 

 of eucalypts are growing in Florida today. Those which are especially 

 well adapted to the climate are E. resinifera, rostrata, viminalis, robusta, 

 and tereticornis. The planting is still in the experimental stage. If 

 the species of eucalypts which are adapted to Florida can be economically 

 grown on a large scale, and will yield durable ties, posts, and piles at an 

 age at which the native trees hardly reach sapling size, they will prove 

 of the great value to the State. There are available for experiment large 

 areas in Dade, De Soto, Lee, Hillsboro, Pasco, Fernando, and Sumter 

 Counties at present, which are not in a high state of productivity. 



Findley Burns. 



ZOOLOGY. — Anatomy and physiology of the wing-sheli Atrina rigida. 

 Benjamin H. Grave, University of Wyoming. Bulletin of the U. S. 

 Bureau of Fisheries, 29: 409-440, pis. 48-50, figs. 15. 1911. 



This study establishes the following points: 



1. The arterial system of the two sides is not symmetrical. 



2. The venous system lacks the "sinus venosus" which is commonly 

 present in lamellibranchs and which receives the blood from all parts 

 of the body previous to entering the kidney. This sinus or a substitute 

 for it is a necessary part of the mechanism described by Menegaux for 

 extruding the foot and other organs whose movement is due to blood 

 pressure. 



3. The blood which enters the gills must pass through a capillary 

 system before emerging again. 



5. There is no pallial line but the mantle is attached to the shell at 

 a single point just ventral to the adductor muscle. As a consequence 

 the mantle can be withdrawn a considerable distance from the edge of the 

 shell. After being contracted the mantle again reaches the edge by 

 creeping outward upon the shell. 



6. The spines on the outer surface of the shell are formed by little 

 tongues of the mantle which creep out into them during their growth 

 period. 



7. The mantle gland which Menegaux calls the "appendice" is 

 probably a "swab" for keeping the mantle free from dirt. 



