[221] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
I haye already described. The mandibles are nearly black; their ante- 
rior alar edges have a deep notch and a prominent tooth. 
The color, which is partially preserved on the arms and ventral side 
of the body, agrees very well with that of Ommastrephes illecebrosus. 
The skin is bluish or pinkish, thickly specked with small purplish brown 
chromatophores. P 
Architeuthis princeps? V. (No. 28.) 
In a letter from the Rev. M. Harvey, dated December 19, 1881, he in- 
forms me that he had been told by Mr. C. D. Chambers, magistrate of 
Harbour Buffet, Placentia Bay, N. F., that a very large specimen of 
Architeuthis had been found on the beach at Hennesey’s Cove, Long 
Island, Placentia Bay, during the first week of November last. This 
was discovered by Albert Butcher and George Wareham, who cut a 
portion from the head. The specimen had been much mutilated by 
crows and other’ birds. The locality is uninhabited. The men esti- 
mated the length of the body and head at 26 feet, but this is probably 
too large an estimate. 
Conspectus of the families, genera, and species of Cephalopoda included in 
this paper. 
In the following synopsis the species that have actually been proved 
to belong to the fauna of the northeastern coast of America, or the 
waters adjacent, are numbered serially. They have all been personally 
studied by me, except Taonius pavo. 
Suscuass DIBRANCHIATA. (See p. [73].) 
Orpver L—DECACERA Blainville. (See p. [75].) 
OIGOPSIDA. (See p. [75].) 
The division called Oigopsid@ includes two very diverse groups, differ- 
ing very widely in their visceral anatomy, as well as in the structure of 
the eyes, siphon, and mantle connections. These may be called Teu- 
thidea and Taonidea. 
The former will include all the Oigopsidz described in this paper 
except the Desmoteuthide. The Taonidea will include the Desmoteuthide 
and also several allied forms, which have usually been carelessly referred 
to Loligopsis. 
TEUTHIDEA Verrill. 
Eyes with free lids, not stalked. Siphon with a subterminal valve. 
Mantle attached to the siphon by free connective cartilages. Stomach 
large, pouch-like; intestine short; liver very large; ink-sac large. Pen 
