xvm 



Map illustrating the Geographical Distrihution of the Land-MoUusca 



of the Philippine Islands 455 



Hypocolhis nmjyelmus, d 2 ^'^ 



Palate of Aulacodus, to illustrate the ridges upon the hard palate . . 625 



Brain of A idacodm, viewed from above 526 



Bkmuophi/Iium petropaiili 584 



Forjicuh auricularia. the Common Earwig. Low male and high 



male 587 



Diagram showing frequency of occurrence of forceps of various 



lengths in male Earwigs {F. auricularia) 588 



Diagrams of XyJotrupes gideon, (f , seen fi-om side. High male, 



medium male, and low male : 590 



Diagram showing frequency of various lengths of the cephalic horns 



in Xylotnqjes gideon, cJ 591 



Table of frequency of elytra of various lengths in Xylotrupes gideon, cJ 592 

 Table of frequency of various lengths of mandible in Lucamis cervus, 



cS 693 



Brain of Capromys pilorides 598 



Brain of Lagostomus trichodactylus 599 



Brain of Dasyproda azarce 602 



Brain of Ccelogenys paca 604 



Brain of Dolichotis j)atagomca G08 



Brain of Aulacodus, Adewed from above 611 



Brain of Rabbit, showing abnormal development of convolutions . . 612 

 Segments hearing atrial and sperm-duct pores in a number of Acan- 



thodrilids 669 



Octochcetus thomasi, dissected to show the principal organs 673 



3 MAY 1893 



