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Show 760 PROF. T. H. HUXLEY ON THE CLASSIFICATION [Julie 4, Fis. 3. xvi xv H-plb |2plb / 13 plbi <''i3ar6 / (2 arh/ / I3pdb /l l a r b jioarb i9arb\ updb Wfdb i0nflb 9 H b Astacus fluviatilis. Spdb The branchiostegite, all the podobranchise, except the epipodite of the first niaxillipodo, and all the artlirobranchia? of the right side are removed ( X 4). XVI XV Fig. 4. I4DI6 '3P,llL^ "PM / '2,p^ I \8arV-Kpclb &arh/ uarh\ ,oar*r»ar6\ 8/xIb I2pc76 updo lopdb 9pdb Astacopsis franklinii. The branchiostegite, all the podobranchise, except that of the first maxillipede, and all the anterior artlirobranchia:, except the first, of the right side are removed ( X 2). seg, scaphognathito (not shown in fig. 4 ) ; 7 cp, the podobranchia of the first maxillipede; Spdb to 13pdb, the other podobranchise; 8arb to 13arb, the arthrobrancliite or their attachments to the arthrodial membranes of the second and following thoracic appendages; 11 plb to 14 plb, the pleurobranchia;; 14, the coxopodite of the hindermost ambulatory limb; cap, the coxopoditic seta? of that limb in Astacus. |