6 Alf Wollebæk. [No. 12 
consists of about fifty articulations. The first joint of the pedunele 
is of about the same length as the two succeeding ones together: 
the second joint is rather shorter than the third. As in the case 
of C. cormatus the coxa is narrowest anteriorly: the posterior 
portion is expanded and forms å cavity with å fairly broad elon- 
gated opening on the upper side of the joint just below the eyes. 
The opening of the cavity is covered along either side by å row 
of sensory bristles (Cilia auditoria) which face each other. Fine 
grains of: sand were present in all the specimens examined by us, 
and they gave åa darkish appearance to å large portion of the joint. 
No otoliths were found. In addition to å row of setae the coxa 
is furnished on the outer edge with aå single small spine. 
2nd Antennae (fig. 2, III) resemble the same limbs in OC. coro- 
natus. "The 2nd joint carries å stylocerite (st), between which and 
the 4th joint is a scaphocerite (sec). Both these are of the same 
length in proportion to the remaining joints as in the said species, 
the scaphocerite being slightly longer than the 4th joint and the 
stylocerite reaching beyond the first third of this joint. 
Mandibles (Siagon) are very well developed, of an irregular 
rectangular shape and furnished with a three-jointed palp (Syna- 
phipod) on the outer side. Corpus is anteriorly expanded triangu- 
larly into an obtusely rounded prominence with irregular slightly 
dentated edges (molar prominence). Below this in the middle of 
the inner edge we find å rounded setose knob to which is fastened 
a chitinous tendon for the strong rotator muscles. On the upper 
surface the corpus is provided with a flattish exparsion terminating 
in å short obtuse projection directed towards the exterior edge 
(see fig. 3, III, B): the palp being attached at the same height. In 
the basal portion of the corpus we find on the outer edge å narrow 
tapering projection (see fig. 3, III, OC). The palp consists of three 
joints, the distal one being the longest, the two remaining ones 
being of almost the same length, about half as long as the third 
joint. In its anterior portion the third joint is thickly covered 
with short setae and it is further provided like the second joint 
with longer less dense setae. The first joint is without setae. 
1st Maxilla (ist Siagnopod) (fig. 1, I V) has three well-developed 
branches, the centre one of which (2) is as usual largest and most 
