577 



MACROPODID^E. 



MACROPODID.E. 



678 



Campotcia retusa. a, details of head. 



preceding joint, after the manner of a sub-chelifonu claw ; the length 

 of the second pair of feet is nearly twice and a half that of tlie post- 

 frontal portion of the carapace, and the succeeding feet diminish 

 successively in length but very little ; abdomen composed of seven 

 juints in both sexes. (Milne-Edwards.) 



B. LatrdUii. This species is found in the Falkland Islands. 



Eurypodiiu Latreillii. 



Amathia (Roux). This genus agrees in some respects with the 

 Pericerce of Latreille ; indeed the aspect of both is the same, but the 

 external antennae of Amathia have not the peculiar disposition which 

 is visible in Pericera, and the space which the orbits leave between 

 them is scarcely wider than the base of the rostrum, whilst in Pericera 

 it is more than double, 



It has a carapace in the form of an elongated triangle with a 

 rounded base ; its upper surface and its borders beset with enormous 

 spines ; the rostrum, which is terminated by two large divergent 

 horns, nearly as long as the post-orbitary portion of the carapace. 

 Eyes small, and partially protected by a spine which occupies their 

 external canthus, but, as in the preceding genera, they are not retractile 

 and always remain projecting. External antennas presenting nothing 

 remarkable ; the basilary joint is long, very narrow, and soldered to 

 the front ; the stem is inserted under the rostrum, at some distance 

 before the level of the eyes; it is very slender, and its first two joints 

 are of equal length ; epistome large, and nearly as long as it is wide ; 

 the third joint of the external jaw-feet is dilated outwards, and trun- 

 cated at its two internal angles. The first pair of feet are shorter 

 than the succeeding ones ; they are filiform in the female, and a little 

 convex or swollen in the male ; the succeeding feet are long and 

 filiform ; the second pair are more than thrice as long as the post- 

 orbitary portion of the carapace, without including the posterior spine ; 

 the others are much shorter, their terminal joint is long, sharp, and 

 without either spines or teeth on its inferior surface ; abdomen com- 

 posed of seven joints in both sexes. (Milne-Edwards.) 



A , Rimoana. Carapace armed with thirteen enormous spines, three 

 of which elevate themselves from the stomachal region, one from the 

 cardial, and the others occupy the border of the buckler; one on 

 the intestinal region, three on each side upon the branchial region, 

 and one upon each of the hepatic regions : there is a small spine in 

 front of the eyes, and a larger one at the anterior angles of the buccal 

 frame ; feet, as well as the carapace, covered with a sort of down ; 

 length about two inches ; colour yellowish, with two spots, red upon 

 the front It has been found at Toulon. 



KAT. HIST. DtV. VOL. III. 



Inachus (Leach). This genus, as established by Fabricius, com- 

 prehended nearly all the Oifyrhynchi, with the exception of the 

 Parthenopida;. The genus is now much restricted. 



The carapace is nearly triangular, not much longer than it is wide, 

 and highly embossed above ; rostrum very short, disposition of the 

 eyes different from that in the previous genera in the system of M. 

 Milne-Edwards, the peduncles being capable of being reflected back- 

 wards, and being lodged in an orbitary cavity, which, though not 

 deep, is very distinct ; internal antennoe without anything remarkable : 

 the first joint of the external antenna; soldered to the front before the 

 internal canthus of the eyes, and the second advanced on the sides of 

 the rostrum ; epistome rather wider than it is long : third joint of the 

 jaw-feet much longer than it is wide, nearly of the form of a triangle, 

 with its base in front, and giving attachment to its succeeding joint 

 near its anterior and external angle ; sternal plastron narrowed 

 suddenly between the feet of the first pair, and with its length not 

 equal to its greatest breadth; fset of the first pair very small in the 

 female, but very large in the 'male, and sometimes thrice the length 

 of the body ; the claws always pointed and curved inwards. The 

 succeeding feet cylindrical, slender, and more or less filiform ; the 

 second pair, always longer than the first, are three or four times the 

 length of the post-frontal portion of the carapace ; the others 

 diminish successively in length, and all terminate in a very long 

 cylindrical joint, which is pointed and but little or not at all curved. 

 The abdomen is composed of only six distinct joints. 



All the species are small, and have hitherto been found on the 

 coasts of Europe, particularly those of England and France. In the 

 latter country they have been taken both on the northern and 

 Mediterranean shores. They often haunt coves where there are 

 oysters, and all of them have the body covered with down and hairs, 

 to which sponges and corallines attach themselves ; colour brownish. 

 (Milne-Edwards). 



M. Milne-Edwards divides the genus into three sections : the first 

 containing one species, having the stomachal region furnished with 

 five spines or tubercles, including one (median and posterior) very 

 strong, and four small ones anteriorly on a transversal line. 



/. Scorpio (I. Dorsettensis). It has been taken in the British 

 Channel, &c. 



Inachus Scorpio. 



a, male ; &, female ; c, abdomen of male ; d, abdomen of mature female ; 

 e t abdomen of immature female. 



The second section consists of /. Dorynchus and /. thoracicus, and 

 the third of /. leptochirus. The last is a British species. 



Etjeria. This genus is Asiatic in its geographical distribution, and 

 M. Milne-Edwards divides it into two sections : the first with the 

 third joint of the external jaw-feet deeply notched at its anterior and 

 external angle (E. arachnoides and E. Ilerbttii), and the second with 

 the third joint of the external jaw-feet not notched at its anterior 

 and internal angle (E. Indica). [EciEiiiA.] 



Doclea (Leach). Carapace nearly globular, hairy, and more or less 

 beset with spines ; front raised, and the lateral edges of the carapace, 

 instead of joining the orbits, directed towards the anterior border of 

 the buccal frame ; I'ostrum short and very narrow ; the orbits directed 

 obliquely forwards, and entirely lodging the eyes, which are very 

 small, and have no trace of a spine at the anterior angle of their 

 upper border, a character which renders them easily distinguishable 

 from the Libinue. The basilary joint of the external antenna) 

 advances much beyond the internal canthus of the eyes, and termi- 

 nates nearly in a point under the front, to which it is intimately united ; 



2 p 



