TWENTY-FOURTH ORDINARY MEETING. 293 
Nominations for Officers for the ensuing year were then 
made. 
Mr. Frank T. Shutt, B.A., read a Paper on “The Anatomy 
of the Wood-Louse,” illustrated by diagrams and specimens. 
The following is an abstract : 
NOTES ON THE ANATOMY OF THE WOOD-LOUSE.* 
This paper opened by discussing the various classifications of the 
Crustacea by Huxley and others, and concluded its remarks upon 
this subject by adhering to the classification which places the 
Oniscidae as a family of the Isopoda, the latter being ranked as an 
Order of the Edriophthaimia. 
A general description of the anatomy of the Isopoda followed, 
which points out the most characteristic features that serve to 
distinguish the forms of this order from those of related orders, ¢.g., 
respiratory function of lamellate abdominal feet ; absence of Cephalo- 
thorax, ete. 
The life-history of the members of this Order was then briefly out- 
lined, and it was shown that although the vast majority of them 
were marine, many were fresh water types, and others, as the 
Oniscidae (to which the Wood-Louse belongs) were terrestrial. The 
fact was also noted that such terrestrial forms were always found 
in damp places, and therefore that moisture was necessary for the act 
of respiration. The family of the Oniscidae, while somewhat isola- 
ted, is yet a widely spread group, being found in both Hemispheres, 
and as far north as Greenland. - 
The anatomy of the parts and appendages was then fully described, 
the descriptions being accompanied by drawings made by the Author. 
The segments of the head, thorax and abdomen, as to their shape, 
colour, etc., first received treatment, and then a more minute account 
of the attachments followed. 
With regard to the appendages of the Head, the most important 
features to be noticed are—the possession of a single pair of Antenne. 
These are the Antenne proper. This seems to point toa high degree of 
development in the Oniscide, and in conjunction with the fact that 
the mandibles possess no palps causes them to resemble some of tlie 
Myriapoda. The eyes are sessile, black, slightly convex, and ae 
*This paper was awarded the McMurrich Medal, Uniy. Coll., Toronto, 1885. 
