490 



CRUSTACEA MALACOSTRACA. 



Fam. 3. Dajidae. On Schizopods. Adult female with only 5 pairs of 

 thoracic legs, body curved round the eggs. Male completely or imper- 

 fectly segmented in adult state. Dajus Kroy. on My sis and Siriella. 

 Aspidophryxus Sars ; Notophryxus Sars ; Heterophryxus Sars. 



Fam. 4. Cabiropsidae. On free or parasitic Isopods. Female, in adult 

 state, reduced to an incubatory pouch folded round the brood. Em- 

 bryo with peculiar ventral abdominal shield. Clypoeniscus G. and B. ; 

 Munnoniscus G. and B. ; Seroloniscus G. and B. ; Cdbirops Kossm. on 

 Bopyrus. 



I tit JT fc 



ao 



FIG. 303. Adult female of an Entoniscid (Portunion maenadis) (from Lang's Textbook, 

 after Giard and Bonnier). A with the brood cavity partly opened in the ventral median 

 line and the brood lamellae separated ; the ventral side of the abdomen is seen. B with the 

 brood cavity intact, and the abdomen seen from the dorsal side. Ir the anterior, middle and 

 posterior lobes of the first brood lamella of the right side ; II. &e same of the left side ; Ilr 

 and I second brood lamellae, right and left ; Illr and I third brood lamellae, right and left ; 

 IV fourth brood lamellae ; Vr and I fifth brood lamellae, right and left ; ab abdomen ; ne 

 second, ai first antenna ; ci cephalogaster (dorsal surface of head containing paired diverti- 

 cula of the alimentary canal) ; ens endopodite of third abdominal appendage ; ex% exopodite 

 of the second abdominal appendage ; h cardial prominence ; mf maxilliped ; cv ovary ; fl 

 pleural lamella of first abdominal segment ; th thorax. 



Fam. 5. Podasconidae. On Amphipods of the sub-families Ampelis- 

 cina and Lysianassina. Adult female reduced to an incubatory pouch, 

 which is closed ventrally by the fused oostegites of the 5th thoracic legs. 

 Male unknown. Podascon G. and B. on Haploops. 



Fam. 6. Cryptoniscidae. Hermaphrodite and protandrous parasites on 

 the Rhizocephala or other Cirripedes. Adult symmetrical ; all or most of 

 the appendages have disappeared. Cryptoniscus Fr. Miill. (Fig. 302), 

 Danalia Giard (Fig. 301), Liriopsis M. Sch. ( = Liriope Rathke). Eumetor 

 Kossm. paras, on spp. of Peltogaster and Sacculina and their allies. 

 Cryptothir Dana ( ? = Hemioniscus Buchholz) on non-parasitic Cirripedes. 



