W. Lilljeborg on the Genera Liriope and Peltogaster. 61 



forming his proposed order of Cirripedia Suctoria, which he 

 considers to constitute two famiHes : — 



He also gives the following modified characters of the genera 

 Sacculina (Pachybdella) and Peltogaster : — 



Genus Sacculina, Thompson. 

 (Pachybdella, Diesing.) 



Animal e Crustaceorum classe et Cirripediorum subclasse, ecto- 

 parasiticum, sub abdomine Crustaceorum Decapodorum Brachy- 

 urorum degens. 



Animal adultum crassum, sacciforme, transverse ellipticum, cute 

 (pallio) leevi, molli, sed firma, corpus internum crassum, carnosum, 

 genitalia continens et sine cavitate digestioiiis distincta, instar pallii 

 circumdante, vestitum. Os in organo adfigendi subinfundibuliformi 

 et corneo perforatum, et in oesophagum vel tubulum suctorium trans- 

 iens. Genitalia bisexualia. Testes duo, sacculiformes, elongati ? 

 vel fortasse tubuliformes et ramosi ?, in corpore interno positi. Ova- 

 ria ramosa, tubuliformia, in corpore interno sita. Tubuli oviferi 

 numerosi, ramosi, cseciformes, circa corpus internum ad duas mem- 

 branas tenues adfixi. Cavitas inter corpus internum et pallium per 

 foramen sat magnum, ori oppositum et plicis pallii circumdatum, 

 aperta. 



PuUus entomostraciformis, pullo Cirripediorum processibus ad 

 latera partis anterioris corporis similis, et tantum processibus pluri- 

 bus posterioribus diversus. 



Genus Peltogaster, H. Rathke. 



Animal e Crustaceorum classe et Cirripediorum subclasse, ecto- 

 parasiticum, in abdomine Crustaceorum generis Paguri degens. 



