FIG. 221. Thoracic feet 

 of ScMzopoda (after G. O. 

 Sars). A and B, Lophogas- 

 ter typicus. A, 1st thoracic 

 foot (rnaxillipede) ; B, 2cl 

 thoracic foot of the <? , with 

 brood-lamella. C-E, Mysis 

 flexuosa. C, 1st thoracic 

 foot (maxillipede) ; , 2d 

 thoracic foot (maxillipede) ; 

 E, 3d thoracic foot. F-I, 

 Thysanoessa gregaria. F, 

 1st, G, 5th, H, 7th, I, 8th 

 thoracic feet. I, II, Joints 

 of the protopodite, 1-5, of the 

 endopodite ; en, endopodite ; 

 ex, exopodite ; br, gills ; ep, 

 epipodial plate ; brl, brood- 

 lamella ; k, masticatory 

 ridge. 



FIG. 222. 

 Boreomysis 

 scyphops 9 

 (after G. O. 

 Sars). The 

 free portion 

 of the ceph- 

 alo-thorax 

 cut off at x 

 to show the 

 free thoracic 

 segments II- 

 FIII lying 

 beneath with 

 the branchial 

 folds ~br. aul, 



Cup-shaped ophthalmic lobe without eye (without pigment or visual apparatus) ; ctj, 0-2, anterior 

 and posterior antennae ; mdt, mandibular feeler ; mx, maxillse ; & 1; 1st thoracic foot with exopodite 

 (ex) and epipodite (ep), the latter in the uncovered branchial cavity; U, brood lamellze of the 

 2d-8th removed thoracic feet ; ab\, 1st abdominal segment ; cth, cephalo-thorax. 



VOL. I Y 



