REPORT ON THE AMPHIPODA. 283 



or four elbows ; first joint of fifth and sixth feet forming great oval plates, concealing all 

 the others. T. monoculoides. Fig. 252 ; mag. |. [T.] nolens." Figure 252 is not a 

 Typhis, but' probably the Cancer Gammarus monoculoides of Montagu, now called Stenothoe 

 monoculoides. It should be noticed that the letters n. s. after Fig. 251, do not mean new 

 species, but natural sixe. 

 Tribe III. Gammaracea," are thus subdivided: — 



Body depressed ; epimera very small or obsolete ; abdomen straight, normal ; 

 three last pairs of false feet tipped with swimming-plates ; antennse foot- 

 shaped, ........ Corophiadx. 



" Body much compressed ; epimera very large, scale-like, and encasing the 



bases of the first four jjairs of feet, posterior extremity formed for leaping. 



" Superior antennas longer than the footstalk of the inferior, and 



much longer than the head ; mandibles carrying long palps ; 



antennae lash-like, ...... Gammaridm. 



" Superior antennae much shorter than footstalk of inferior, and 



scarcely longer than head ; mandibles without palps, . . Orchesfiadse." 



" Family I. Corophiadx, contains 1. " Gerajjus (Say). Second feet fanged ; fang two-jointed ; 

 all the antennae without many-jointed lashes at the tip. C. pelagicus. [C] falcatus. C 

 Whitei Fig. 253; mag. f;" 2. " Poc^ocerifs (Leach). First and second feet fanged; fang 

 one-jointed ; inferior antennre without lashes. P. variegatus. [P.] pulchellus. Fig. 254 ; 

 mag. f;" 3. " Corophium (Latr.). Second feet not fanged; inferior antennae without 

 lashes. C. longicorne. Fig. 255 ; mag. f ;" 4. " Unciola (Say). First and second feet 

 fanged ; aU the antennae tipjjed with many-jointed lashes ; superior pair furnished with a 

 minute appendage at the base of the lash. U. irrorata. Fig. 256 ; mag. i." 

 The small figure of Cerapus whitei seems to show a second gnathopod with a dilated wrist and 

 narrow hand quite unlike the small cup-shaped wrist and dilated oval hand depicted for 

 Cerapus whitei in "A Naturalist's Rambles on the Devonshire Coast," but the figure in. this 

 work is too small to build any argument upon. The generic description, it should be 

 observed, says " fang ^;po-jointed." 

 " Family II, Gajimaeid^," contains Gammarus (Fabr.), with the species locusfa (Fig. 257), 

 marinus, rampitolops, jnde.e, grossimanus, longimanus, Cranchii, prmctatus, carinatus, 

 maculatus ; Amp)hithoe (Leach), with the species punctata, fucicola, ohtusata, Moggridgei, 

 ruhricata (Fig. 258), dubia, spinosa (Fig. 266), carino-spinosa (this and spinosa being 

 bracketed as " = Dexamine (Leach) ; " Leucothoe (Leach), with the species articulosa 

 (Fig. 259) ; Acantlionotus (Owen), \nth the species testudo ; Anomjx (Kroyer), with the 

 species alhus (Fig. 261) and elegans ; Opis (Kroyer), with the species typica (Fig. 262). 

 "Fanuly III. OncHESTiADiE," contains Talitrus (Latr.), with the species locusta (Fig. 263); 

 Sulcator (Bate), with the species arenarius (Fig. 264) ; and Orchcstia (Leach), with the 

 species littorea (Fig. 265) and Deshayesii. 

 As '■'■Genera apparently intermediate between tlie Edriophthalma and Podophtlialma," he places 

 the Family CuMADiE, containing the genera Cuma (M.-Edw.), Alauna (Goodsir) ; Bodotria 

 (Goodsir). 



1855. LeYDIG, FeANZ. 



Zum feineren Bau cler Artliropoden. Arcbiv fiir Anat. uud Physiol. Jahrgaug, 

 1855. pp. 376-476. Taf. xv.-xviii. 



See Note on Leydig, 1878. Pages 444, 445, 452 of this work are mentioned in the references. 



