476 MOLLUSCA. 
Body elongated, pyriform, smooth, or faintly wrinkled. Head long, 
the distance from the aperture to the base of the arms being nearly as 
great as to the posterior extremity. Aperture not extending to the 
eyes, the lip having a slight angular projection at the centre. ‘Tube 
broad at base, soon becoming slender and cylindrical, truncate at tip, 
reaching to the origin of the arms. Eyes not prominent, rather large, 
pupil black, iris golden; on the superciliary region are three cirrhi; 
the largest over the posterior angle of the eye, the posterior one near 
the angle of the aperture, the other at about the same distance in front 
of the middle cirrhus. As seen, they were wart-like, but doubtless have 
the property of being extended. The neck is expanded below the 
eyes, so that the ventral surface of the head is broader than the dorsal. 
Arms very long and slender, and nearly equal in length. The cupules 
are large, nearly contiguous, on short peduncles, with a thin lip, the 
interior radiately grooved, and the margin of the inner orifice tumid ; 
ninety-six pairs were counted on the upper arms. ‘The umbrella is 
small, extending laterally much farther than from before backwards, 
and not extending far along the sides of the arms. ‘The ground colour 
is ochreous, but constantly varies, sometimes being nearly black, or 
mottled with ash-colour, or entirely ash-coloured, the dark shades 
being always produced by minute dottings. The under side is paler, 
and shaded with orange-coloured dots. Cupules milk-white. 
Length of body, six inches; of arms, about forty inches. 
Obtained in the market at Rio Janeiro, and from fishermen. 
This animal is remarkable for its long and slender form, its small 
umbrella, its dusky colouring, and for the warty cirrhi above the eyes. 
Its general form and coloration are like those of O. tetracirrhus, Delle 
Ch.; but it is more slender, the cirrhi are different in number and 
position, and the membrane between the arms is far less developed. 
Its proportions are much like those of O. macropus, Risso, but its 
coloration is very different. 
Figure 589, the animal, with details. 
Ocrorus ornatus (Gould). 
Corpus subglobosum: caput dimidiam corporis latitudinis adequans : ocult 
