SCOLOPHTHALMUS. 225 



the basal segment bears a small vesicular incubatory lamella, the second seg- 

 ment a well developed excpod ; 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 setJB ; 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 tlie 

 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 sette, which arise from the distal eiKl 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 lamellae. 



The natural position of this genus appears to be next to Hanse^iomi/sis* a 

 genus based on a single mutilated specimen of H. fylloc. 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- 

 senomi/sis 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 ScolojMhalmm, and the 

 outer plate of the uropods is fringed with setae on the inner margin only. 

 The maxillipeds of ScolopMhnlmus, like those of Ilansenomysis, are devoid of 

 exopods and internal meral lobes. The gnathopods are similar to tho-se of 



* Arctomj/sis Hansen, Vidensk. Meddelelser fra Naturliist. Forening i Kjobenhavn for Aaret 1S87, 

 p. 210, Plate VII. Fig. 5-5', 1S88 {iiom. praoc.) ; Hansenomi/sts Stebbing, Hist. Crust., p. 268, 1893. 



