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2.')4 'ULLliTIN ^1, UNITKU STATICS NATIONAL MTSEl'M. 



Kioiii the cxtcniiil (m1,!;o oI' eacli of tlicso lour (,'iirtiIii};os tlui (rnito- 

 biaiK'liiiils nuliiito. The foiirtli or postrriur is fmiuently coiilliiciit 

 with its h.vobranchial. (I'liite r.l, li->'. 1.) Witii tiie coiiiplolioii of the 

 iiietanioiphosis tlie basi- and hyobraiu-hials fuse into a siii<;Io i>it'C(', 

 and tho ('('latobraucliials iiniti' with tho same phite, ex(;ei)tiii.i;- the 

 fourth, wliieli, be(!oiniu,s,' ossilied, forms the only true bone of tiie le- 

 li'iou. In some tyix'S the ossilicalion becomes more extensive, as in 

 Cychtrliamphus; (Plate 7(1, li,ir. l'>.) Sometimes the third eeratobran- 

 chial is ossilied, as in Alytes {I. c, lij;'. 2) and Ileniisns (/. c, liy. IS;. 



Tiie dij;its of the Salientia are apparently four anteriorly and live pos- 

 teriorly ; there is <;enerally a rudimental diji'it, in adilition, on the inner 

 side of each foot. Tlu^ thundt is especially well developed in tlie llylid 

 frenus, Ilyi)siboas ^Va^l.; (Plate 72, 11 f>'. I'd.) The inner di^it of the pos- 

 terior foot, or the internal hallux, as it is called, lias three elements in 

 .some of the lianas (see Plate (»">, li((ii(( ntlchcmuKt), while in other forms 

 the diyit is principally represented by a lar<>e Hat i)halan,;;e. This is 

 called the spur or metatarsal tubercle in works on the subject, and it is 

 sometimes incorrectly referred to the tarsus. 



The carpus of the Salientii has but two i)roximal elements, the inter- 

 medium not bcinji' distii^-t. There is alar}.-!! centrale, which forms part 

 of the inner border (»f the i)alm. Tin; order is further characteri/ed (ex- 

 cept in the I)iscoi;lossida' ami the Aj^iossa, 7, v.) by the fusici of tiie 

 iburth and (ifth (tarpalia into a single element, the unciforme. The 

 other three earpalia are distinct, and the tiist is frecpiently displaced 

 to form the base for the metacarpus of the thumb. The larj^c si/eof the 

 astraj^alus and calcaneum have been already referred to. The tarsus is 

 further peculiar in the absence of iiiterniedium and centrale and the 

 absence of tarsalia, except a rudiment or two near the inner part of 

 their usual position. (Plate 7.'5.)* 



INTECUMENT. 



Th(^ slij^ht attaiihment of the intej^umeiit to the nius(des is a well- 

 known feature of the IJatradiia Salientia. The manner of their attach- 

 ment presenis many varieties in the ditferent {(roups. It is as follows : 

 A transverse partition of connective tissue holds the inte^iument alonji' 

 the a(;romials and another aloiij;' the coracoids; a lon<;itudinal band on 

 each side of the back (IVecjucntly marked externally by a glandular fold) 

 and one below it on each side of the abdomen; a band or line aloiiiLrthe 

 hinder inferior face of the thij^hs, extending;' nearly to the popliteal re- 

 {•ion, i'ud a delicate one aloiij;' the upiier hinder face of the same, from 

 the groove between the superior and posterior muscles. 



'Tlm«o result. swore sent in totlioSocretiiry of tlioSiiiitliHoui.'ni Institution Feln-iiiiiy, 

 IHf^T. Tliroiij^h till' (Itday ill publication tlnn- have been auliciiiati'il by an a<lniiral)li; 

 l)iil)i>i' on tlic carpus and tur.sus of Salieutia l)y Mr. (i. B. Howes, Proceeds. Zool. Soc. 

 London, IS-'-', p. HI (Muicb). 



