662 ; CLASS X. 
Phyllosoma Lracu. Body depressed, covered by two shields, 
the first oval, the second transverse, placed above the trunk. Eyes 
set upon a long petiole. 
Comp. Leacu in Tuckry’s Expedit. to the Zaire, pp. 416, 417, and fig. 
Pl. x1., Journal de Physique, Tom. 86, 1818, pp. 306, 307, GusiRiIn Mém. 
sur VOrganisation des Phyllosomes et Monographie de ce genre de Crust. 
Magasin de Zool, 1833, Cl. vit. Pl. 6—13, C. Geaunsaur Ueber Phyllosoma 
in SIEBOLD and KoELLIKER Zeitsch. f. wissensch. Zool. V. 1853, p. 352. 
The latter author, from the consideration of the circulation, which in its 
more minute details agrees with that of the decapods, thinks that Phyllo- 
soma ought to be arranged with these. 
a) EHxternal antenne setaceous, longer than internal. Abdomen distinct 
from trunk, divided into segments, with terminal pinna. 
Sp. Phyllosoma commune Tuckey 1. 1., with fig., Desmar. Crust. Pl. 44, 
fig. 5.—Phyllosoma clavicorne TucKEY ibid. with fig., Dusmar. ibid. fig. 4. 
b) External antennee lamellose, increased by a lobe at the base, shorter than 
internal. Abdomen very short or triangular, continuous with the shield 
of trunk. 
Sp. Phyllosoma laticorne Tuckey 1. 1., Cancer cassideus J. Forster, Natur- 
forscher XVII. pp. 206—213, Tab. 5. 
Most of the species come from the Indian and African seas; yet one 
species from the Mediterranean is known. ‘These animals gave occasion to 
the name of the family which does not apply to the following genus. 
Amphion Epw. Shell elongate, oblong, continuous, covering 
head and all the segments of trunk. ‘Tail narrow, conical, com- 
posed of seven segments, terminated by a flabelliform pinna. Ex- 
ternal antennz long, furnished with an oval scale at the base, 
filiform. 
Sp. Amphion Reynaudii MILNE Epwarps, Ann. de la Soc. entomol. 1. 1832, 
pp. 330—340, Pl. 12 a, Hist. nat. des Crust. Pl. 28, fig. 8. 
Family XXVI. Caridicidea or Schizopoda. Shell covering 
head and trunk, descending to the sides over the bases of feet, com- 
pressed. Abdomen long, made up of seven segments, the seventh 
with two lamellee of the last abdominal feet on each side composing 
a flabelliform pinna. Feet of trunk slender, natatory. 
This family forms by its habitus the transition to the following, 
from which, however, it differs by the absence of shear-shaped feet 
and by the gills not being included within the shell. 
