125 
OVISACS. They are very large and somewhat oblong (fig. 3b); those [ found were 
a little flattened, the one drawn is ‘74 mm. in length. Hach of the ovisacs containing 
numerous middle-sized eges. 
LARVA. The only specimen found (fig. 3n) is *22 mm. in length. Inside the base 
of the antennula an oblique, somewhat geniculated, pretty considerable list. The antennule 
2-jointed, their terminal seta exceptionally long; the olfactory seta scarcely half the length 
of the cephalothorax. The antennz somewhat shorter than the antennulee; the second joint 
of the same length or a little longer than the first one; third joint short, its terminal seta 
about as long as the whole antenna. Of the maxillule I have only been able to find a 
single rather short branch on one side. The second joint of the maxillee proportionally long 
and rather slender, the third joint comparatively short; the joints smooth. The abdomen 
much as in S. paradoxa, however, the long setz of the first segment extend a little further 
behind the caudal stylets, and the terminal sete of these stylets are scarcely half the length 
of the body. 
POST-LARVAL DEVELOPMENT. A single pupa (fig. 31 and fig. 3m) has been 
found and is mentioned above on p. 56. 
HABITAT. Argissa typica Boeck from the west-coast of Greenland. In the 
marsupium of a female was found the large female represented and a male attached to it, 
besides an unattached male, a larva and four ovisacs, two and two glued together, all 
without larvee and not varying much in size. In an immature specimen without marsupium 
was found the pupa represented; in another young specimen the recently hatched female 
represented in fig. 3¢ and 3d; it was hinged to a gill by a rather broad, triangular (in 
fig. 3d visible) adhesive plate, which on the gill expanded into a circular disk. 
REMARKS. The female presents very few peculiar characters, whereas the very 
beautiful male is distinguished from kindred species by several characters. A lateral view 
of the male, when placed under the microscope, so as to leave out the dorsal outline, pre- 
senting only the part immediately above it, shows the peculiar aspect of the spaces beneath 
the skin represented in fig. 31. 
14. Sphezronella Metope n. sp. 
(PI. IV, fig. 4a; pl. V, fig. 1a -1g). 
FEMALE. The specimen represented in fig. 1a, which is the largest and best, is 
‘40mm. in length and 33 mm. in breadth; the head is tolerably large and well defined from 
the sub-globular trunk; probably the female can become somewhat larger. The frontal margin 
is naked (fig. 1d). The antennule of about medium length, with rather short sete. Tbe 
antenne good-sized, 3-jointed; the basal joint short, the terminal seta about the length of 
the last joint. The mouth-border of about medium breadth. The maxillule with well 
