CLASS I. CRUSTACEA. 
301 
Fam. I. Phhouyma»j;. Leach’s MSS. 
**8 S fourteen : antenna two, inserted one on each side of the front of 
the head. {Tail furnished with styles.) 
Genus 1. PHRONYMA. Lutr., Leach, Lamarck. 
‘lead large, mitant : antenna Inarticulate, tire first joint small : thorax 
seven-jointed, all its segments bearing legs : legs compressed, two 
anterior pairs with the antepenultimate joint furnished at its point 
with a foliaceous process ; the penultimate joint with the point bifid 
a nd terminated with a small claw: third and fourth pairs simple, 
longer, somewhat thicker, terminated by a bent claw : fifth pair 
large, very long, thicker, didactyle ; the first joint gradually thick- 
e ned towards its point; the second subtrigouate ; the third ovate, 
and abruptly narrowed at its base ; the last narrowed at its base ; the 
Ungers curved, and internally furnished each with one tooth : sixth 
and seventh pairs simple, terminated with a nearly straight claw : 
abdomen Inarticulate, each segment, on each side, with a double ap- 
pendice, placed on a peduncle : tail Inarticulate, the first joint on 
e ach side furnished with a hiarticulate process, terminated by two 
s tyles; second joint with four processes, each terminated by two 
styles ; the inferior processes hiarticulate, the superior Inarticulate. 
' P- 1- Phron. sedentaria. Fifth pair of legs with the apex of the thumb 
and base of the fingers internally denticulated, 
ancer sedentarius. Forsk. Fn. Arab. 95. Phronyma sedentaria. Lair. 
Gen. Crust, et Ins. i. 57. leach, FJin. Enci/cl. vii. 403 — 433. — Trans. 
Linn. Soc. xi. 355. Cancer (Gammarellus) sedentarius. Herbst, ii. 
130. t. 37- .fig. 8. 
Inhabits the Mediterranean Sea and Zetland Sea, residing in a cell 
composed of a gelatinous substance, open at each extremity, where 
11 sits in an incurved posture. 
The only specimen of this most interesting, rare, and curious 
animal was taken by the Reverend Dr. J. Fleming, one of our most 
jealous naturalists, who found it on the 3d of November 1809, at 
“array in Zetland, amongst rejectamenta of the sea, and communi- 
^ted it to Dr Leach. 
Fam. II. Gammartd.t.. Leach’s MSS. 
°d.V laterally compressed : legs fourteen, with lamellifbrm coxte : 
antenna four, inserted by pairs. {Tail furnished with styles.) 
Stirps l — Antenna : four-join ted, the last segment composed of many 
nttle joints ; the upper ones very short. 
■p G enus 2. TALITItUS. Latr., Bose , Leach. 
°nr anterior legs in both sexes subequal, monodactyle ; 'upper antenna 
shorter than the two first joints of the under ones. 
