^ 



SI. 



mtoropos- 

 jtrarrrom 

 v/Aii is pei- 

 torior I'lid, 

 toiids only 



)!■ ciintlms 

 I ii point :i 

 :)f tlu^ c.vc. 

 :illaiv,an<l 

 1 row. At 

 wards for a 

 rior nostril, 

 e C.fiiscu.s. 

 !tiinis ill its 

 ftlK' month 

 •CO in Ironl, 

 rly tills tlio 

 \d theinan- 

 ohls, wliicli 

 f intercom - 

 I'idgos form 



• badlypro- 



e si'parati'd 

 The linf-crs 

 ihly shorter 

 tensive fold 

 Iheextennd 

 It is mo>t 

 'lor toes arc 

 The lirst is 

 K> third ami 

 3ssed. litis 

 )rder, which 

 ciy wide on 

 )nler of the 



• fold on tin- 

 is species, 

 ndinal nnvlir 



Th s fold i«! 

 distension of 

 (H'sal <;roove 

 I the back or 

 lil has ii free 

 )r edge, thns 



Tin-: HATUACIIIA OF NOimi AMKRICA. 41 



dilleriri},' from the siiecies of Necturus. A groove along the side of the 

 tail divides it into ii snperior and infeiior portion, and a lateral wedge- 

 shaped mass, covered with longitndinallyfoldetl skin, intervenes between 

 the two for abont one third the length of the member. J)ermal mncons 

 pores arc especially abnndant on the head of this species. They generally 

 appear in the middle of a low, elongate, dermal papilla, dividing it into 

 two pai>illa'. These are closely placed in a triangnlar patch, of which the 

 maxillary border forms the hypotennse, a line extending backwards from 

 the nostril i»arallel to the middle line, another side ; and the other bf)rder 

 transverse, pussing abont its own diameter poir^terior to the eye. Ibit 

 there are nnmerons other similar papilhe posterior to this patch, and 

 on the siih's of the anterior half of the neck. A series of donble i)a- 

 pilhe extends ronnd near the border of the lower Jaw, becoming obso- 

 lete on the symphyseal region. A <!onsi)icnous an^hcd row of the sanu' 

 extends ronnd opposite the inferior edge of the lower jaw ; and between 

 it and the snperior row are niinu'rons other pores and papilhe. A row of 

 1 ori's passes ronnd within ea<;h arm on the sides of the thorax ; and there 

 are t wo r(» ws on the sides, one above and the other l)elow, the lat( ral Ibid. 

 The ni)per row is continued on the wedge like portion of integnnuMit, 

 forming tlie middle of the basal third of the side of the tail. 



The branchial (issnre is half-way between the angle of the lower Jaw 

 and theshonlder. The vent is small. 



Midfiiirdiiculx of A'o. It'iVi. if- 



Total \o\\'^t\\ 't-ll 



r.(Mi<j;<li from end of iiiii//.lc to I'lid of vent :51'.) 



I^ciifil'ii from ('Mil of nuiz/.ld to line of };roin vi7."> 



I.i'n^tli from end of iiui/zlt' to line of axilla 100 



Width between nostrils Oi;{ 



Width hetween eves O-J'.t 



(ireatest width of head O'lO 



Width hetween axilhe 015 



Width at base of tail OHO 



neplh of tail at middle !.'')."> 



Len;;tli of for(^ linih from axilla OM 



I-enjfth of fore foot !)il 



Length of hind limb U\'l 



I,en.;;th of hind foot O'iO 



Len;:;lh of lower lej; O'ili 



Width between internal nostrils i>'2\'* 



Tin- largest spe(!innMi (No. 10(113) measures i>l') '""". 



The usual color is rather light lead-colored above iind a still paler 

 shade of the same below. Tliert' are indistiintt darker spots on the sur- 

 face above, only visible when the animal is in fluid. Sometimes these 

 shiides are represented by very distinct ilark-brown spots (Xos. I'i'.U, 

 7(101). Soiin^ specimens have the ground color brown of a lighter hue 

 (No. TOO,")), the dark spots being present or absent. Tiiroe s|)ecimens 

 (No. 0L'0.">) are abnost entiri'ly black. 



This speckles is distrilmfed from western New York and IVitnsyl- 

 vaiiia and the (Ireat Lakes to Iowa, and soiitli t!> (leorgia, N«nth Caro- 



