198 BULLETIN ;il, UNITKD STATES NATIONAL MUSEITM. 



DcsmoijiialhuH fimca tiiiricnlala IloHtrook. 

 KESKUVK SEKIliS. 



Locnlily 



Oakloy, S. (' 



('iiiciiiiiiiti, Oliio ... 

 1 ■ Itiifbinoii^li, (jii . . . 



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Knoxvillc, Ti'iiM — 



When 



I'olU'l'tcll. 



Apiil ."i, IH77 



Kioiii whom iTi'i'ivi'd, 



K. \V. Hay ward 



.1. N. 1!. Sr:iiI)i>ioii};li. 

 Dr. \V. L. .lolifs 



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I'rof.J.Jl. Milcli.ll .. 



Nature of 



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DESMOCiNATHUS NIGRA (irc.n.* 



Baird, .Iimrii. Acad, riiila. (•,') i, \^.'2di> ; Copo, rroecc.l. Ac, Pliilji., IHd'.t, 

 J). 117; .Straiuli, Salam., p. "li ; (iray, Cat. liatr. (irail. Brit. Miis., 

 0(1. 1, p. -10; Boiilengcr, Cat. liatr. (iia<l. Brit. iMiis., «m1. ii, I*,--.', j.. 7'.». 



Salamaitilra nigra Grcoii, Jouni. Ac. I'liila, i, p. Ii.")'.'. 



TiiloH nii/ff Ilolbr., N. A. Hcrp., ami )>. HI, I'l.'i?. 



AmhUjHioma n'Kjnim Diiiii.A; Bibr., ]>. 10.'>. 



J'hthodon n'Kjvr IIalli)\v.. Jour. Ac. Pliila. (2), in, p. :M4, partim. 



Tliis i.s the most robust SiilaiiiaiHlor of tlie oastorn ro;;i(>n.s oC our 

 zoological roalin; it i.s not so sIimkUm' as the (ii/rinophilusporphi/riticns, 

 and isainudi stronger animal. AscompanMl with the P./usca it isiinnli 

 larger, tlie tail ismoreconii)rosse(l and extensively finned, and the color 

 is uniibrmly different. Mesides the ciiaracters already pointed out in 

 the table, it differs from ]>.fuscii as follows: The parasfdienoid i)atcli(s 

 of teeth are prolonged more anteriorly, and approach very near the 

 vomerines in most instances; tliey are always i)rol(niged beyond tlie 

 middle of the orbits ; their prolongation is at the same time nsirrowed, 

 and in most the patches are not distinguished at this point. Tlie v(»m- 

 erine series are better distinguished (though not always), being obli<ine, 

 sepiirate, and not extending beyond nares. Tlie tongue is in ( ight sped 

 mens examined nearly round, while it is always a long oval in the two 

 other Desmognathi ; tinally, tlie only male does not po:-.sess the black 

 pigment coat of the testes always present in the others, though, as in 

 them, the vas deferens is black. The body is stouter, and the width of 

 the head enters the length to the groin les.s than five times — in the 

 others always more; this is also expressed by the existence of only 

 twelve costal plica', and the fact that the appressed limbs are only s"p- 

 aratt'd by 2}r intercostal s])accs. 



Tlie postorbilal plicae are not strongly marked. The mucous pores 

 are well de\eloped, and the two lateral series are often distinct in alco- 

 holic specimens by their white color; when they become dry they ar.' 

 (liflicnlt to observe. There are two rather distant gularseiies within 

 the mandibular rami on each side, and one on eacdi side exlending in 

 wards and forwards from the gular jdica. The superior lateral series 

 extends from the orbit to near the end of tlie tail ; the inferior round 

 the humeri to each side the pectoral region. 



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