ILLUSTRATIONS. XLIX 



Page. 

 FIG. 639. Holophryxus alascensis. a, Dorsal view of female, b, Lateral view 



of female, c, Ventral view of female 576 



640. Holophryxus alascensis. Maxilliped 576 



641. Holophryxus alascensis. First incubatory lamella (distal lobe) ... 576 



642. Clypeoniscus meinerti (After Giard and Bonnier), a, Dorsal view 



of adult female, b, Ventral view of same, c, Female at a stage 



intermediate between a and b. ' d, Mode of opening of incubatory 



lamellae by marginal folds (adult female), e, The same seen from 



within 1 578 



643. Clypepniscus meinerti (After Giard and Bonnier), a, Posterior 

 part, viewed dorsally, of embryo of first stage, b, Lateral view 

 of embryo, c, Ventral view of embryo, d, Sixth leg. e, Pos- 

 terior extremity. /, Fifth leg 580 



644. Oosaccus. a, Dorsal side of female, b, Ventral side of same 582 



645. Tylos niveus (After Dollfus). a, Head with antenna, b, Last two 



segments of abdomen 585 



646. Tylos latreilli. Operculum 586 



647. Tylos latreilli (After Dollfus). a. Head with antenna, b, Las* two 



segments of abdomen 586 



648. Ethelum modestum (After Dollfus). a. Head and first two seg- 

 ments of thorax (upper side), ft, The same (underside), c, Fifth 

 and sixth segments of abdomen and uropoda ( upper side) . d, The 



same (under side) 589 



649. Ethelum americanum (After Budde-Lund). a, Apex of inner 

 lacinia of first right maxilla, b, Left antenna, r, Flagellum of 



left antenna 589 



650. Ethelum americanum (After Dollfus). a, Head and first two seg- 

 ments of thorax (upper side), b, The same (underside), r, Fifth 

 and sixth segments of abdomen (upper side), d, The same (under 



side) 590 



651. Ethelum reflexum (After Dollfus). a, Head and first two segments 

 of thorax (upper side), b, The same (under side), c, Fifth and 

 sixth segments of abdomen and uropoda (upper side), d, The 



same (under side) 591 



652. Alloniscus perconvexus 596 



653. Alloniscus perconvexus. a, Maxilliped. b, Second antenna, c, 

 First maxilla (inner lobe), d, Second maxilla, e, First maxilla, 



. (outer lobe). /, Mandible. </, First antenna 597 



654. Alloniscus perconvexus. Terminal segment of abdomen with 



uropoda 597 



655. Synuropus granulatus. a , Dorsal view. 6, Uropoda 599 



656. Synuropus granulatus. Maxilliped 599 



657.^-Oniscus asellus (After Sars). a, Mandible, b, Posterior lip. c, 

 Anterior lip. </, Second antenna, e, First antenna. /, Second 

 maxilla, g, First maxilla, h, Mandibles, i, Dorsal view of 

 body, j, Maxillipeds. k, Head (lateral view). I, First pleopods 

 of male, m, Head (ventral view), n, First pleopods of female. 

 o, Second pleopod of male, p, Uropod. q, Abdomen (ventral 

 view), r, Last segment of abdomen, s, Seventh leg. t, First 



leg. u, Third pleopod of female 601 



658. Philoscia richmondi 603 



659. Philoscia richmondi. a, Maxilliped. 6, Mandible 603 



