DECAPOD A. 197 



quently bv that of the two foUowinsr pairs, whicli terminate in a 

 forceps -with tAVO blades, or a didactyle hand. In some, the last two, 

 or four, are inuch smaller than those whicli precede them, therein 

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

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

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

 or rostrum. 



Some of them, — Galathadece, Leach, as Avell as the preceding Ma- 

 croura, have four pairs of false feet ; the mediate antennce flexed like 

 an' elbow, with the two filaments representing the stem, are mani- 

 festly shorter than their pedimclc. That of the lateral antennae is 

 never provid(>d with a lamina in the form of a scale. The two ante- 

 rior feet alone 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, 

 bent 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 usually deeply incised or striate, spinous and ciliate. 

 The most remarkable species of the European seas are the 



Galathea rugosa, Fab.; Leo, Rondel., Hist. des. Poiss., p. 390 ; 

 Penn. Brit. Zool., IV, xiii ; Leach, IVlalac. Brit., XXIX, the 

 claws of v.'hich are long and cylindrical, the mandibles eden- 

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

 directed forwards, and ten similar and equally projecting ones 

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

 one f . 



G alathea Hrigo-ia ; Cancer slriqosus, L. ; Herbst., XXVI, 2 ; 

 Penn. Brit. Zool. IV, xiv ; Leach, Malac. Brit., XXVIIT, B. 

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

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

 each side, and an eighth at the end ; the claws arc large, but 

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

 part of the following feet. This last character distinguishes it 

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

 .^qiiaviifera,h5v.ch., Malac. Brit., XXVIII, B. 



This learned entomologist has made a peculiar genus, Grimotea, 

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

 termediate antennee terminates in a club, and the three last external 



* According to a verbal coiriinunication from Doctor Leach, in the Galathea 

 miiplecteiis, Fdb., it is not only tli? two posterior feet which are smaller, but the 

 penultimate likewise. This ppecies would then form a separate genus. 



t This species forms the genus IMunida, Leach. See Desmar., Cousidi-r., page 

 )9l. The latter is mistaken hortcver in attributing to the former tlie credit of 

 having been the first to discover the identity of this species with the Hon of Ron- 

 delet. See my Hist. Gener. des Crust, et des Insectes., t. VI, p. 198. 



