APPENDIX. No. IV, 417 
encrease in length: at the base of the second joint, each is furnished with a 
bipartite flagrum, the second division of which is articulated and ciliated : 
the third pair is terminated by a simple ciliated jomt; the three next pair 
by claws, which in some of the species are ciliated with spines, and meet 
little spines on the interior side of the apex of the joints to which they are 
attached: the last pair is abruptly shorter than the preceding legs, and 
varies in the number of its joints, from two to five. The organs, termed ears 
by the French naturalists, are very large and prominent. I have not 
examined the nervous system. 
1, Phyllosoma brevicorne. Inferior antenne shorter than the superior ones, 
with the second division slightly dilated externally; the two last divisions 
setaceous ; hinder pair of legs two-joited ; the second joint simple. 
2. Phyllosoma laticorne. Inferior antenne a little longer than the superior ones, 
the second joint very much dilated externally, and produced at its external 
apex, the last division lanceolate, hinder pair of legs five-jointed, the last 
joint with a simple slightly curved claw. 
Two specimens only were taken, and their locality was not set down. 
3. Phyllosoma commune. Inferior antennee filiform rather more than twice the 
length of the superior ones, hinder pair of legs four-jointed; the last joint 
terminated by a straight simple claw. 
Taken at Porto Praya and during the voyage until 2, 58, O S. lat. 
9, 21, 22 E. long. in the greatest profusion. 
4, Phyllosoma clavicorne. Inferior antennz filiform, half as long again as the 
thorax, with the extremity of the last division clavate, hinder pair of legs 
four-jointed ; the last jomt terminated by a simple and very slightly curved 
claw. Occasionally taken with the preceding species, 
From the above very general observations, it will be very evident to 
entomologists, that Phyllosoma constitutes a family of crustacea ma- 
croura, to which no other discovered genus can be referred. 
Amongst the sessile-eyed crustacea, with compressed bodies, there are four 
new species which constitute the types of as many genera, and of those 
with depressed bodies, there are; of 
SrH#RoMA, a new species. 6. } 
CyMoTHoA, a new species. 
And a new species of an unnamed genus, intermediate betwixt the genera 
Higa and Eurydice, 
3H 
