780 AUSTRALIAN OCTOPODILVE, 



Genus Cirroteuthis, Eschricht. 

 Body with two transverse medial fins : arms united by a web 

 nearly to their tips. 



Family II. TEEMOCTOPIDJE. 



Genus Tremoctopus, Chiaje. 



Body rounded : two aquiferous pores in the neck : third right 

 arm hectocotylized, fringed on the sides, and developed in a sack- 

 like aperture on the side of the head. 



Genus Parasira, Steenstrup. 



Body rounded : head small ; no aquiferous pores : third right 

 arm hectocotylized, not fringed, developed f rom a pedicelled sack. 

 Male very different from the larger female. 



Genus Halipiiron, Steenstrup. 

 Arm only known, with bell-shaped cups having lily-like borders. 



Family III. AEGONAUTID.E. 



Genus Argonauta, Linnaous. 

 Characters those of the family. Third right arm hectocotylized. 



Family I. OCTOPODID/E. 



Genus Trttaxeopus, Owen. 



Synopsis of species. 

 1. The cups of the arms sub-equal, regular. 



A. The lower cups far apart, in one series. 



a. Body smooth, not bearded. 



b. Body smooth, bearded. 



c. Back slightly granular. 



d. Back granular, rough. 



B. The lower cups rather crowded. 



a. Body smooth, not bearded. 



