360 ARCTURID^E. 



ing a distinct genus or subgenus, it will be necessary to 

 employ for them another name, in which case that of 

 Leacia, proposed in 1825 in honour of Dr. Leach, by 

 Dr. G. Johnston, must be used instead of Arcturus, a 

 step, however, which we by no means considered neces- 

 sary and advisable. 



Mr. Goodsir, who carefully studied the animals of 

 this group, w r as not acquainted with the characteristics 

 of the male sex in the Arcturi, almost all the speci- 

 mens which he procured having eggs in the marsu- 

 pium. The eggs are pear-shaped and curved, and have 

 a tough external membrane, with a granular white and 

 a light yellow mass to\vards their centre, which may be 

 of the nature of yelk globules. The ovaries are two 

 elongated white granular bodies on each side and beneath 

 the liver: they open at the third segment of the body, at 

 the extremity of the marsupium. 



