trs 



MACROPODID.E. 



MACRO PODID.B. 



Fibricius) ; of which wo subjoin a drawing, may be Uken u a good 

 example of UiU genus. 



Leptopodia UfitlaHa. 



Latrtiltia (Ram.). Carapace triangular, truncated anteriorly, and 

 not covering the last ring of the thorax ; epistome much longer than 

 it is wide; second and third joint* of the external jaw-feet very 

 narrow ; feet filiform and very long ; abdomen of the female of five 

 joints only, though the sutures of two others may be distinguished ; 

 structure of that of the male not known. 



L. elegant is the only species known. Carapace smooth, front armed 

 above with two large divergent horns, and with a spine directed for- 

 wards between the antenna; ; feet of the last four pairs with the third 

 joint spiny, the penultimate joint a little dilated above towards its 

 extremity, and the tarsus very short ; abdomen armed with six spines, 

 two of which are situated on the median line and four near the edges. 

 Length about an inch. Colour yellowish. 



It is found on the coasts of Sicily. 



M. Milne Edward* thinks that the 3faia icticornu of Bosc should 

 be placed near this species. 



Acktnu (Leach). This genus is very nearly allied to StenorKynchui 

 and Inarhut, but is distinguished from all the other genera of this 

 family by the form of the posterior feet and some other characters. 



Toe carapace is, as in the greater part of the family, not extending 

 on the last segment of the thorax, nearly triangular, and convex on 

 the branchial regions. Rostrum nearly null ; eyes not retractile, and 

 curved upon rather long peduncles ; first joint of the external antennae 

 soldered to the front and advancing above the level of the internal 

 canthus of the eyes; the second joint inserted on the sides of the 

 rostrum and entirely exposed above. Epistome nearly square ; third 

 joint of the external jaw-feet longer than wide, nearly triangular, and 

 giving attachment to the succeeding joint near its anterior and external 

 angle. Sternal plastron suddenly narrowed between the anterior feet, 

 which are slender and short, while those of the succeeding pairs are 

 filiform ; the second pair are nearly twice and a quarter longer than 

 the post-frontal portion of the carapace, and terminate by a stylifurui 

 and entirely straight joint; the succeeding feet are much shorter, and 

 the terminal joint of the last four is large, compressed, and falciform. 

 Abdomen composed of six joints in both sexes. (Milne-Edwards.) 



Adam hss hitherto been found only in the British Channel 



A. Cnauhii is the only species of the genus. The rostrum is formed 

 of two small triangular teeth, and not extending beyond the second 

 joint of the external antenna ; a spine on the anterior face of the 

 ocular peduncles ; genital and cardial regions elevated in the form of 

 tubercles ; feet with very long hairs, and hooked. Length from 6 to 

 8 line*. Colour brown. 



It Is found at Falmouth in England, and the mouth of the K&nce 

 near St Malo. The species lives among the sea-weeds and oysters. 



StauirkynchuM (Lamarck ; Latreille). Carapace triangular, and not 

 prolonging itself above the last thoracic ring. Rostrum advanced, 

 bifid, and sharp; orbits circular, eyes rather projecting and not 

 retractile. Internal antenna; capable of being folded back longitudi- 

 nally, and the fonwte in which they are lodged not completely 

 separated from each other; the first joint of the external antenna; 

 confounded with the neighbouring parts, and very narrow; the second 

 inserted on the sides of the rostrum, and the third much longer than 

 the second. Kpistome longer than wide, and the pterygottomian 

 regions rudimentary ; buccal frame longer than it is wide. External 

 jaw-feet narrow, third joint oral, and the fourth rather long ; sternal 

 plastron narrow between the anterior feet, but afterwards wider, and 

 pramoting on the median line a suture which occupies the last segment 

 of it ; feet of the first pair short, but much larger than the succeeding 



ones, the claw (manus) which terminates it convex, and the fingers a 

 little curved inwards ; four last pair of feet filiform and extremely 

 long ; the length of those of the second pair equal five or six times of 

 the width of the carapace ; the others become progressively shorter ; 

 their penultimate joint is a little dilated towards the end, and the last 

 joint is stylifnrm and a little recurved. Abdomen hi both sexes com- 

 posed of six joints, the last of which is formed by the union (aoudurc) 

 of the sixth and seventh rings. (Mime-Edwards.) 



The species of this genus are found in the European seas. 



& Phalangium (Cancer PHaJ.anffiu.rn, Pennant; Cancer roilratut, 

 Linn.; Macrojiut Phalanytim, Latreille; ifacrojiodia Phalanyium, 

 Leach). This species is found on the coasts of the English Channel. 



Stenorhynchui rhalanylum. 



S. tenuirottrii, Bell (Leptopodia tenuirottrii, Leach), the Slender 

 Spider-Crab, is also found on the British coasts. 



Vompoida (Leach ; Latreille). Carapace convex and nearly pyri- 

 form, but truncated anteriorly; rostrum rudimentary and scarcely 

 reaching beyond the internal canthus of the orbits. Eyes supported 

 upon peduncles, which are rather long, recurved anteriorly, and very 

 large at their bane ; they are capable of being reflected backwards, but 

 they are not retractile, for there is no post-foramiuary orbital cavity 

 for lodging them, their extremity being ouly protected by a spine of 

 the lateral part of the carapace. The internal antenna; are reflected 

 a little obliquely forwards ; the foasets which lodge them have this 

 particularity, namely, that they are not separated, as they are ordi- 

 narily, by a longitudinal portion, and form only a quadrilateral cavity. 

 The first joiut of the external antenna; is long and delicate, and is 

 continued nearly as far as the rostrum, carrying at its extremity a 

 moveable stem, which is consequently completely exposed. The 

 epistome is nearly square, and the external jaw-feet are very much 

 elongated, and only close the mouth imperfectly. The feet are slender 

 and very long ; in the female the first pair are the shortest, and are 

 not stouter than the succeeding ones ; those of the third, the fourth, 

 and the fifth pair are a little longer, and are also terminated by a 

 cylindrical nail slightly curved downwards. Form of the feet of the 

 male, and disposition of the abdomen in this genus, not known. 

 (Milne-Edwards.) 



The species are found in the seas of Asia, 



('. return may be taken u an example. 



Enrypodin* (Gucrin). A genus forming in certain points a passage 

 between the Macropodians already noticed, and some of the Maiidie, 

 such as I/itlimui auritui ; approaching the hitter in the form of the 

 feet, and resembling the former in the length of those members and 

 in the disposition of the eyes. 



The carapace triangular, twice as long as it is wide, rounded 

 posteriorly, narrow anteriorly, convex and unequal above ; rostrum 

 formed by two long and horizontal horns ; eyes carried on peduncles 

 of moderate length and not retractile ; disposition of the internal 

 and external antenna; nearly the same as in Stenorhynchiu, fnachut, 

 Ac. ; epistome wider than it is long ; third joiut of the external jaw- 

 feet nearly square, as wide as it is long, and deeply notched anteriorly 

 and internally, in order to give insertion to the succeeding joint. 

 Anterior feet of the length of the body in the male and much shorter 

 in the female ; they are a little convex, and the fingers are slightly 

 curved inwards ; the succeeding feet are very long, their third joint 

 is cylindrical, but the fifth is compressed, and dilated below ; its 

 greatest width is below the middle ; the finger is large, recurved, very 

 sharp, and capable of being Ivut back against the lower edge of the 



