ILLUSTRATIONS. XLIX 



Page. 

 Fi(4. <)39. — Iloldphrvxus alascensis. a, Dorsal vii-w <>i feinaU'. />, Lateral view 



of female, c, Ventral view of female 576 



()40. — Holophryxu.s alaseensis. Maxilliped -. 576 



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



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



of adult female. />, Ventral view of same, r, Female at a stage 



intermediate between a and h. d, Mode of opening of incubatory 



lamelliK by marginal folds (adult female). «', The same seen from 



within 578 



648. — Clypeoniscus meinerti (After Giard and Bonnier), a, Posterior 

 part, viewed dorsally, of end)ryo of first stage, h, Lateral view 

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

 terior extremity. /, Fifth leg 580 



644. — Oosaccus. a, Dorsal side of female, h, Ventral sitle of same 582 



645. — Tylos niveus (After DoUfus). a, Head with antenna, h, Last two 



segments of abdomen 585 



646.— Tylos latreilii. Operculum 586 



647. — Tylos latreilii (After Dollfus). a. Head with antenna, h, Las*- two 



segments of al)donien 586 



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

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

 and sixth segments of abdomen and un)[)oda ( n])per side), d, The 



same ( under side ) 589 



649. — Ethelum americanum (After Budde-Luiid ). ((, Apex of inner 

 lacinia of first right maxilla, h, Left antenna. <•, Flagelluni of 



left antenna 589 



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

 ments of thorax (upper side). />, The same (underside), r, Fifth 

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



side) 590 



651. — Ethelum reflexum (After Dollfus). <i, Head and first two segments 

 of thorax (upper side), b, The same (underside), 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. h, 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. ((, Dorsal view, b, Uroj)oda 599 



656. — Synuropus granulatus. Maxilliped 599 



657. — Oniscus asellus (.\fter Sars). a, Mandible, b, Posterior lip. r, 

 Anterior lip. d, Second antenna, e, First antenna. ./', Second 

 maxilla, g, First maxilla. /(, Mandibles. /', Dorsal view of 

 • body. ./', Maxillipeds. A, Head (lateral view) . /, First pleopods 

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

 0, Second pleopod of male. }>, Uropod. q, Abdomen (ventral 

 view), r, Last segment of abdomen, .s'. Seventh leg. t, First 



leg. n, Third pleopod of f(>male 601 



658. — Philoscia richmondi 603 



659. —Philoscia richmondi. a, Maxillijjed. h, Mandible 603 



