Fig. 1.— Ideal composition of the hitherto I Fig. 2.— The same seen sideways, 
known parts of the Clytea Leachii. | 
a, frontal spine of the Cephalothorax ; h, orbital spines ; c, nuchal furrow ; d, branchial 
furrow ; e, hinder forked furrow ; /, shallow furrow passing from the branchial furrow 
towards the lateral protuberance {h) if the middle part of the cephalothorax ; g, short furrows 
running from the nuchal furrow forward ; i, side-piece of the middle division of the cephalo- 
thorax, which stretches forwards under the front portion ; Ic, smooth border of the cephalo- 
thorax; I, long joint (femur) of the finger-foot; m, short joint (tibia) of the finger-foot; 
n, carpus ; o, fixed finger of the pincers ; q, q^, q", q'' , walking feet ; r, r, cheld of the first 
two pairs of walking feet; s, s, claw-hke end-joint of the hinder two pairs of walking feet; 
first ; u, second ; v, third ; fourth ; x, fifth ; y, sixth ; z, seventh hinder body -rings. 
a, undivided middle lappet of the swimming foot ; B, outer antennae ; y, hindermost maS' 
ticatory foot ; first ; second ; G, third ; fourth ; I, claw-like last joint of the same. 
