No. 391.] REVIEWS OF RECENT LITERATURE. 623 
single bladder, containing 246 scolices, only 217 normal. The abnor- 
malities are grouped as follows: (1) simple diminution in the number 
of suckers, two heads having three each; (2) simple augmentation 
in the number, two heads having five suckers each, six, six each, one 
eight and one nine suckers; (3) double rostellum, two heads with 
two rostella each; (4) double rostellum with extra suckers also, two 
scolices with double rostella and six suckers each, one such with 
nine and one with ten suckers. If it be true that the heads with six 
suckers produce the triangular chains in the adult, as has been gen- 
erally maintained, the author justly inquires what heads with three, 
five, eight, nine, and ten suckers will produce ? 
In a seal shot during the Swedish Arctic Expedition of 1898 were 
found abundant remains of a cephalopod, identified by Lonnberg 
(Ofversigt, Kgl. Vet. Akad. Forh., 1898, No. 10, p. 791) as Gonatus 
fabricii. This demonstration of the use of cephalopods as food by 
the seal in its pelagic wanderings shows “that the cephalopods 
form an important link in the chain of marine organisms from the 
microscopic plankton to the mammals.” 
