DECAPODA. 197 



quently by that of the two following pail's, which terminate in a 

 ith two blades, or a didactyle hand. In some, the last two, 

 or tour, are much smaller than those which precede them, therein 

 approaching the Anomala; hut the fan-like fin of the extremity of 

 their tail and other characters remove them from that section. The 

 thorax is narrow anteriorly, and tin* front projects in a pointed snout 

 or rostrum. 



Some of thorn, Gala'hadete, Leach, as well as the preceding Ma- 

 croura. ha\v tour pairs of lal-r fret ; tin* mediate antennae flexed like 

 an* dhow, with the t\vo filamen nting the stem, are mani- 



festly shorter than their peduncle. That of the lateral antennas is 

 iie\vr provided with a lamina in the form of a scale. The two ante- 

 rior fret all-lie terminate in a didactyle hand, which is frequently much 

 flattened. The last segment of the tail is bilobate, at least in most of 

 them. 



At the head of this division come those whose * posterior feet are 

 much smaller and thinner than the preceding ones ; they are filiform, 

 hent up. and useless in locomotion. In the 



GALATHEA, Fab. 



The tail is extended, the thorax nearly ovoid or oblong, the medi- 

 ate antennae salient, and the forceps elongated. The superior surface 

 of the body is I'.s'.rilly deeply incised or striatc, spinous and ciliate. 

 The most remarkable species of the European seas are the 



Galathca rugosa, Fab.; Leo, Rondel., Hist. dcs. Poiss., p. 390 ; 

 IVnn. Brit. Zool., IV, xiii ; Leach, Maine. Brit., XXIX, the 

 rl.iws of which are long and cylindrical, the mandibles eden- 

 tate, and that lias three long spines in the middle of the front, 

 directed forwards, and ten similar and equally projecting ones 



the tail, six on the second segment, and four on the following 

 "' t- 



Galatkea strigosa ; Cancer strigosus, L. ; Herbst., XXVI, 2 ; 



n. Brit. Zool. IV, xiv; Leach, Malac. Brit., XXVIII, B. 



Similar, as respects the mandibles, to the preceding species, but 



having' a projection in front, or a rostrum, with four teeth on 



ii side, and an eighth at the end; the claws are large, but 



neither very long nor linear, and very spinous, as is a great 



pirt of the following feet. This last character distinguishes it 



from a third species, also found in European seas, the Galathea 



.. M.ihu-. Brit., XXVIII, B. 



Thi> learned entomologist has made a peculiar genus, GRIMOTEA, 

 of the Galathea gregaria of Fahricius, The second joint of the in- 

 termcdiatean; \>\\i\ .itrs in a club, and the three h;>t external 



* According to a verbid communication from Doctor Leach, in the (ialatkca 

 amj'l not only the two posterior feet which are smaller, but the 



Kite likewise. This species would theu form a separate genus. 

 f This species forms the uc \, Leach. See Desmar., Consider., page 



191. The lutter is mistaken however in attributing to the former the credit of 

 n s been the first to discover the identity of this species with the livn of ROD- 

 dclct. See my Hist, Gener. des Crust, etdcs Insectes., t. VI, p. 198. 



