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THE VOYAGE OF H.M.S. CHALLENGER. 
The phylogenetic relations of Spirula with other Dibranchiates .may be represented 
by the following table : 
1 The relations of the Octopods with the CEgopsids (more archaic), and especially the group Leachia, are 
demonstrated by the following facts : 
1st. Certain of these last have not more than eight arms ( Leachia , Ckaunoteuthis, Chiroteutliis 
bonplandi, adult Veranya, the Cephalopod [embryo] of Grenacher). 
2nd. Cranchia and Leachia among the CEgopsids, and the generality of Octopods, are deprived of a well- 
developed “ resistance ” apparatus. 
3rd. The Octopods, like the CEgopsids, have still two pairs of well-developed salivary glands. 
4th. Leachia and Chiroteutliis bonplandi have no longer an infundibular valvule like the Octopods. 
5th. The kidneys of the Octopods and of the CEgopsids stretch only to the ventral side of the visceral sac. 
6th. The Octopods and the CEgopsids have two oviducts. 
7th. Cranchia and Leachia have no longer any nidamental glands, like the Octopods. 
8th. In the Octopods, like the CEgopsids, we find cases of hectocotylised arms on the right or on the left. 
