8 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
the body, sub-elliptical in shape, the posterior margin almost straight, the 
anterior more curved. The internal cartilage (Plate 3, Fig. 5) lies in a hori- 
zontal plane around the hinder end of the body ; it is almost semicircular, 
delicate and transparent, and pointed at the extremities ; on the external sur- 
ace near the extremity is a facet with which the base of the fin articulates ; 
the long axis of the fin is directed somewhat forward with respect to the 
median axis of the cartilage. 
The Head is short; the eyes prominent, standing out somewhat further 
than the sides of the body. 
The Arms are long, slender, and sub-equal, and taper very gradually to their 
ends, but as these were in many instances mutilated, it is impossible to give 
accurate dimensions : the length was, however, about 5-6 cm. The suckers are 
small, placed in a single series, very elosely set, and of firm consistency, em- 
bedded in much soft connective tissue and not in the museular substance of 
the arms, Most of the suckers were lost, and it was only here and there that 
I could find traces of the cirri alternating with them: those I did find were a 
little longer than the diameter of the suckers, and rather stout and blunt. 
The Color, when alive, is shown in the sketch reproduced on Plate 2, 
Fig. 9. 
The solitary specimen on which this species is based came into my hands 
in a state approaching disintegration and fell to pieces under very careful 
handling. The characters which I was able to decipher are, however, quite 
suflicient to prove that it cannot be placed in any genus yet known. Fortu- 
nately a sketch, partly colored, was made of thé animal immediately after its 
capture, which, reproduced in Plate 2, gives the form and proportions of the 
animal much more clearly than could be ascertained from. the preserved speci- 
men. On the margin of the drawing is a memorandum by Mr. Agassiz to the 
effect that the creature was “ like Otrroteuthis, but no film” (umbrella). "This 
statement is very important, for it proves that the absence of the umbrella is 
not due to defective preservation. 
FAMILY ALLOPOSIDAE. 
Alloposidae, Verrill, '81, p. 365, 
BOLITAENA. 
Dolitaena, Steenstrup, ’59, p. 183. 
Although this generic name was published and very briefly characterized 
more than forty years ago (Steenstrup, '59, p. 183), the type was first de- 
scribed in the “Challenger” Report (Hoyle, '86, p. 16) from notes made in 
the Copenhagen Museum. It was then placed by me in the family Poly- 
podidae (Octopodidae) along with Eledonella and some other forms, but on 
reconsidering the question in connection with the specimen to be described 
