T I! I 



30T> 



T II K 



if tin 



. Ilirni ;i' 



4, ami iln nut |n-rinit tlu-ir scpa 

 , . I:, i, he ODMTVM, each of the bnnch 



1 into 

 I'lc distance from tli. 



- the lining im-inlirain- is covered with spongv 



:u- linuu-hiii' lire, it 



' reduced to till' -.(Me Ml' VI 



In tli. : lying on tin- \ sides 



, v ,- but tlu-ir U-\ti:i 



they, ! backwards su : v the whole 



ill' the vault of tin- li -position which is only met 



with in tin- family of tin- ('<itnnii't<>pe. 

 Tlii 'of UK- 7Vi>'//./i/M.,i//A ha- lint little or no 



ami is wider than it is Ion;;: i 1 



"ccupies about two-thirds of its trail - 

 atoral holders de-cube a regular curve. 

 Tho front is remarkably wider than the bnccnl frame, ami 

 more or le.ss curved downwards. Tlu- <(/<> have a stout 



hort peduncle, the length of which is : 

 than double the diameter, and its lower surface is occupied 

 by tli. lor about half it.s length. The orbits au- 



. and always present at their internal angle a narrow 

 gap tilled by the external antenna. The tiili'mn/ n/i- 

 li'iiiKF are horizontal, and, in general, nearly entirely hid 

 by the front. The basilary joint of the <.<'/,(/ <inti'ini(f 



- into tin- trap which occupies the intern;'! angle 

 of the orbit and scpaiatcs tliis cavity from the an;. 



: little developed, and the mo\, 



whic!. "in it in 1 )i is vcr\ small. TllC 



is nearly linear, and placed on the same level a> 

 tiie lower border of the orbit. The liuccul frame is nearly 

 us larire 1 liind. ami the fourth joint of the ex- 



ternal jaw -feet is insert. -d sometimes at the internal 

 . sometimes at the middle of the r.nterior border of 

 the preceding joint, and sometimes at its extoi mil 

 The anterior //"/ are much stronger and nearly : 

 longer than the succeeding ones ; they are but little, if at 

 all, compressed. The third pair of feet are the ' 

 of all, but they are not twice the length of the post-, 

 portion of the carapace, and they terminate, like the 

 others, in a styliform tarsus. The second joint of the abdn- 

 mfn of the male covers the corresponding portion of the 

 sternal plastron throughout it.s width, an.' to the 



h.lsilary joint of the posterior feet. The abdominal appcti- 

 s of the second pair in the male are filiform towards 

 the end, and at least as long as those of the first pair. 

 (M. 



l/,ilii/x i.f //,c Tribe. These are very remarkable. All 

 the known species live in the earth near the banks of rivers 

 or in humid forests ; bearing a strong analogy to the Land- 



M. K. 



.M. Milne Edwards divides the tribe into three sec- 

 tions : 



1. Third joint of the external jaw-feet nearly square, 

 and giving insertion to the succeeding joint by a notch 

 in its internal angle. 



's. Tlii-l),lin<,,i Latreille). 



riifitn-i- wider than it is 



wed behind and very slightly convex above. Tin 



arccly separated, but the .\tninnchal 



hen it is distinct, is extremely wide forwards. 



The fronto-orbital or anterior border of the eaiapaec. occn- 



about two-thirds of its t universal diameter, and its 



Intend borders arc very much arched in their tv.o anterioi 



third portions: the : border is cijnal in width to 



the half or two-fifths of il 



y little inclined, nearly straight, and wider than the 



al frame. Tho nrliiln are n\al: they present no 



i id are furnished with n 1;.. i tooth 



n their lower wall near the internal canthns 



of the eye. The nni ,.nrow. The 



ml of the I'xlrrtiiil /(//, m it form. 



- a little, or not at all, beyond the ll 

 iiibilal wall against which it is implied. 



3, and their third joint, near!) 



m; joint at its i 



:i 'iiinealed u long 



hing in its form that of the Caii- 



' nli'l I't/rl-mrtOfa, 



Cf riant. Anterior /;-/alwavs much longer than ! 

 jair, and unequal in sue : ihe ' A in- 



aild the claw winch I 



nuch elongated, and line'j deiitilated. *- 1'ivt 



ill sligh' ly . 



.aed with ve.y stiong lion. 



aie much shorter than the third, the length nf wliu 

 . ipial twice the length ol 



Tin : 

 tuition app. wide. The foi 



. lia. ( )n ' ; at 



.ud at 1'ondiche 



.-. ish. 



;.l. and S\na. 



Tliis well 



known to the antient.-.. and to be that noticed by II 



and Aristotle : these '/'//. '. 



the Ileiarleotie ( the hitter 



///*/. Am, n., \\ . '2 : and to be :i an- 



tient medals. 



Ttir/fihuxtijlii'- Ui on the I 



of rivers. 



s (^ 



! \li:nml jaw-Toot of ;- 1 



2. Third joint of external jav ,uaro, 



and giving insertion to the succeeding joint towards 

 the middle of its anterior border. 

 Genus, Boscia (Edwards : l'u,'i> 



Generic ('/inructrr. General form ucarh 1li. same as in 

 some of the T/ieffi/iiixer ; but the front, which is sharply 

 bent downwards, is vertical, and the third joint of lli. 

 It run! jiiir-fi'i't, instead of being square and havii: 

 ordinary form o\i-ting in the (\u<i'fritinx. \- narrowed for- 

 and carries the succeeding joint on the middle of 

 its anterior bonier. (M. E.) 



M. Milne Kdwards remarks that tliis ge: -trial, 



like the Tin l]ilnntr,' and inhabits also the banks of 1 1 

 He slates that a dissection of an individual well jiM-civcd 

 in spirit by M. Andouin and him.self, discovered to them a 

 \erv n : in the branchial apparatus of 



this ei the cavities which enclose the breathing 



organ- 'ted far above the upper suil: 



branchias and present a great vacant space, the walls nf 

 which are lined with a toiuentcse membrane covered with 

 Vegetal 



Kvnnpli . . the only known species. 



Length about '2 inches. 



:illes and South Am. 



.'{. Third joint nf the external jaw-feet having ' 

 the form of a reversed tiiangle. ami giving Insertion 

 to the Succeeding joint b_> its external angle. 

 '..ilreillo . 



.//lief nearly horizontal above 



and much less wide than in T/if//./m*<i. /'/<./// wide, 

 lamellar, and sini])Iy inclined; in-lnlx neailv circular; 

 borders of the < 

 as in ThrliiliiiMi; but the form oft! 



. ditlcrciit. their third 



with its summit directed in with 



the succeeding joint by it- .1:1! angle. 



* Jill! f.-.' (lost, |l. 



