W. Lilljeborg on the Genera Peltogaster and Liriope. 165 
culatis destitutum. Os in organo adfigendi subinfundibuliformi 
vel acetabuliformi plus vel minus corneo, absque appendicibus 
buccalibus, in latere inferiore corporis situm. Ad extremitatem 
unam (anteriorem) corporis apertura, interdum magna, interdum 
parva, cavitatem generalem corporis internam aperiens adest *. 
Nullum corpus internum carnosum adest nullusque ventriculus a 
cavitate corporis distinctus, quare hee cavitas, que intus, sub 
cute firma et transverse fibrosa, membrana tenui pellucida sat vero 
firma est vestita, et ad alimentum digerendum vel saltem adser- 
vandum, et ad ovaria complectanda servit. Genitalia bisexualia ? 
Partes due subclavatee vel sacculiformes (? testes vel vesicule 
seminales), pedunculo vel canali ad membranam internam cavitatis 
corporis sub ovariis adfixet+. Ovaria duo, in principio in fundo 
cavitatis corporis supra et inter partes illas duas sacculiformes 
adfixa, juxta sese posita, extus sacciformia, intus acinosa, mem- 
brana cellulosa circumdata, et demum totam cavitatem corporis 
explentia, et inter se ita coalescentia, ut vix disjungi possint. 
Pulli iisdem antecedentis similes, entomostraciformes, cum Cirri- 
pediorum pullis processibus lateralibus a parte anteriore et infe- 
riore corporis exeuntibus congruentes, sed tamen etiam formam 
pullorum Lernzidarum referentes. 
From their more simple internal structure, the deficiency of a 
fleshy internal body, and the sacciform ovaries which occupy 
the whole cavity, the author considers that these animals form 
not only a distinct genus, but even a distinct family. This pre- 
sents some analogies with Darwin’s order Apoda. The structure 
of the larva and of the mature animal, which is probably herma- 
phrodite, appears to prove that both Peltogaster and Pachybdella 
belong to the Cirripedia. 
The form of the body in Peltogaster is cylindrical, sometimes 
a little flattened, and the aperture leading into the cavity of the 
body is placed at one of its extremities. These characters 
distinguish Peltogaster from Pachybdella. In other respects the 
two genera are similar. The body in Peltogaster is sacciform, 
enyeloped in a soft and smooth, more or less compact and trans- 
parent skin, which has externally a very fine, transparent, struc- 
tureless, chitinous epidermis, and under this a thicker and less 
transparent dermis, of fibrous structure, and furnished with 
transverse fibres. The thickness and opacity of this skin vary 
in different species, and even apparently in individuals of the 
Same species, according as the internal parts are more or less 
developed. Within the dermis is a delicate transparent mem- 
brane without epithelium, slightly attached to the dermis by an 
* Rathke regarded this orifice as a mouth. 
+ Rathke, perhaps correctly, regards these as male sexual organs, and 
therefore believes the animals to be hermaphrodites, which is also the case 
in the Cirripede which approaches them most closely, although it is still 
very different—namely, Darwin’s Proteolepas. 
