SCOLOPHTHALMUS. 225 
the basal segment bears a small vesicular incubatory lamella, the second seg- 
ment a well developed exopod; the body of the fourth segment is very short, 
but is expanded internally into a large and broad porrect lobe or plate, which 
reaches forward nearly to the end of the long fifth segment; the inner mar- 
gin of this lobe is fringed with sete; terminal segment small, its margin 
setiferous, and tipped with a strong spiniform seta. The following pairs of 
legs are long and slender, the antepenultimate reaching forward beyond the 
base of the antennal scale ; the third and fourth pairs are imperfect in both 
of the specimens obtained, only the bases together with the exopods remain- 
ing; the distal segment of the second pair is short, unguiform, and partially 
concealed by long sete, which arise from the distal end of the antecedent 
segment; the distal segment of the fifth, sixth, and seventh pairs is lanceo- 
late, and drawn out to an exceedingly long and acute point; the proximal 
end of the propodites of these three pairs of appendages is divided into three 
short segments. The first to the fifth abdominal appendages bear each 
a pair of simple appendages which increase in size successively from the first 
to the fifth; the inner branch of the posterior pair of abdominal appendages 
(uropods) is long, lanceolate, surpassing the telson and the outer branch, the 
latter of which is rounded at the distal end, and divided by a transverse 
suture; the inner branch is setose on both margins, the outer branch is 
setose on the inner margin and also the distal part of the outer margin, 
beyond the transverse suture; there is a spine at the point where the 
transverse suture meets the external margin of the outer branch. Marsupial 
pouch. of female composed of seven pairs of incubatory lamella. 
The natural position of this genus appears to be next to Hansenomysis,* a 
genus based on a single mutilated specimen of H. fyllw taken off the west 
coast of Greenland in 80 fathoms. As far as can be determined by compari- 
son with Hansen’s description and figures, Scolophthalmus differs from Han- 
senomysis in having a prominent rostrum, spiniform eye-stalks (?) and long 
robust antennular peduncles which surpass in length the antennal peduncles 
and equal the antennal scales; moreover, the proximal part of the outer 
margin of the antennal scale is smooth and naked in Scolophthalmus, and the 
outer plate of the uropods is fringed with seta on the inner margin only. 
The maxillipeds of Scolophthalmus, like those of Hansenonysis, are devoid of 
exopods and internal meral lobes. The gnathopods are similar to those of 
* Arctomysis Hansen, Vidensk. Meddelelser fra Naturhist. Forening i Kjébenhavn for Aaret 1887, 
p. 210, Plate VII. Fig. 5-54, 1888 (nom. preoc.) ; Hansenomysis Stebbing, Hist. Crust., p. 268, 1893. 
29 
