g G. O. Sars. 



The 2nd pair of antennæ, or the antennæ proper (ibid.), 

 are in the form of 2 flattened (not as in most other 

 Branchipodids compressed), foliaceous larnellæ, generally 

 extended straight downwards. In length they about equal 

 the antennulæ, and are about twice as long as they are 

 broad. The tip is evenly rounded, and exhibits, about in 

 the middle, a very small pointed projection. Otherwise the 

 edge is evenly curved, and provided with extremely delicate, 

 small sensory hairs. Within the base of each antenna 

 enters from the head a muscular bundle, which soon divides 

 into numerous fine, diverging branches (see fig. 3). Any 

 essential significance however, this muscle does not seem 

 to have, as the antennæ are scarcely movable, and generally 

 keep their prone attitude nearly unaltered during life. 



The anterior lip is easily observable in a ventral or 

 lateral view of the animal (fig. 2), forming a flap-shaped 

 expansion covering over the masticatory parts of the 

 mandibles, though admitting of being somewhat removed 

 from them ventrally. 



The mandibles also appear very distinctly in the lateral 

 view of the animal (fig. 2), lying like a pair of much bent 

 bows on each side of the head, at the limit between its 

 anterior part and the cervical segment, and meeting ventrally 

 at the place where the oral aperture occurs. 



The maxillæ, in the lateral aspect of the animal, are 

 hidden by a lobular expansion of the cervical segment, 

 containing the lower part of the shell-gland (see fig. 2). 



Of branchial legs there are, as in all true Branchipodids, 

 1 1 pairs, all of a rather uniform structure, though somewhat 

 diminishing in size both anteriorly and posteriorly. They 

 arc pronouncedly laminar in character, and are extended 

 downwards and somewhat laterally, with the anterior face 



