IsOTODELPHYS. 
237 
of lower joint arising in pairs. The third pair of foot- 
jaws (f. 1 /) is composed of seven articulations, the 
basal being the largest, the others diminishing in size as 
they succeed, and all armed with a number of long setae 
on the inner edge. 
The legs are five pairs, all formed alike. They con- 
sist (f. 1 g) of a common footstalk, of two joints, and 
two branches, each of which is divided into three articu- 
lations. The external branch is much the larger of the 
two, and has the last articulation the longest, and armed 
with several rather long setae. The internal branch is 
about as long as the first two segments of the external 
portion, and the articulations are short and setiferous. 
The fifth pair is formed like the others. 
The abdominal portion of the body is small and slender, 
the animal generally carrying it curved upwards. The 
last segment is bilobed, and each lobe gives off five 
tolerably strong setae or spines. The alimentary canal 
consists of a simple straight tube. 
Hab . — Frith of Fortin IT. Goodsir, W. Thompson, Esqrs. 
Genus — Notodelphys.* 
The genus Notodelphys of Allman must form the type 
of a new family. Till we are better acquainted with it, we 
must place it here provisionally, as it has many things in 
common with both the Cyclopidae and Cetochilidae, though 
it differs materially from both. 
Character . — One eye. Head and first ring of thorax 
consolidated together. Thoracic portion of body consists 
of four, and abdominal also of four segments. Superior 
antennae many-jointed ; inferior prehensile. Foot-jaws, 
four pairs. Ovary consists of a large sac, placed behind the 
last thoracic ring, and within the parietes of the body. 
* From vojtoq, tergum, back ; and 8t\<pvg } matrix or womb. 
