THE BATRACHiA OF NORTH AMERICA. 159 



of the sides of the head, body, aud basal third of tail are dusted fine 

 white dots. 



Measureinents. 



M. 



Length, axial, from end of muzzle to rictus oris 00375 



Length, axial, from end of muzzle to axilla 0086 



Length, axial, from end of muzzle to groiu 027 



Length, axial, from end of muzzle to eud of veut 03 



Length, axial, from end of muzzle to end of tail 0,58 



Length of fore limb 00575 



Length of fore-foot 002 



Length of hind limb 007 



Length of hind foot 0028 



Width of head .0038 



Width of body 0032 



Width of tail 002 



Ouly one s])eciiiieii of this species has come uuder my observation. 

 It was found by 0. J. Maynard, of Salem, Mass., at Jacksonville, 

 Fla., in February, 18G9. It is preserved in the museum of the Pea- 

 body Academy of Sciences, which institution lent it to me lor determi- 

 nation. 



From the form of the tail it is i)robably a more aquatic animal than 

 its congener ili. g?mcZr/Y//</ito^«.s, and if the specimen be an average one 

 it is not quite so diniinutive. 



MANCULUS gUADRIDIGITATUS Holbr.* 



Cope, Proceed. Ac. Pliila., 1869, p. 101; Bouleuger, Cat. Batr. Grad„ 

 Brit. Mus., ed. ii, 1882, p. 75. 



Salamamh-a quadridigitata, Holbr., N. A. Herp., V, p. 65, PI. 21. 



Batraclioseps quadridigitatus, Baird, Jouru. Ac. Phila. (2), i, p. 287 ; Strauch, Salam. 

 p. 85; Gray, Cat. Batr. Grad. Brifc. Mus., ed. i, p. 42. 



This interesting species is among the least, if not the very smallest, of 

 American salamanders. It is much like Spelerpes bilineatus iU general 

 appearance, but is still slenderer, and with longer digits. 



I can see nothing distinctive in the head, except that the pedicel- 

 late tongue is very large, oval, elongated ellii^tical, nearly twice as 

 long as wide, and filling the interspace of t!ie Iowcj' jiw. The teeth 

 ai)pear as in S. hilineatus. The bead is narrower than in this species. 



The body is cylindrical, depressed, with fifteen costal furrows; a six- 

 teenth would lie in the axilla, but can not be traced. The separation of 

 the limbs varies considerably ; in the largest specimen the distance from 

 snout to axilla is contained nearly three and one-half times In that to 

 groin ; in others hardly 3 times. 



The tail is slender, subquadrangular, and longer than the rest of the 

 animal. 



Tiie digits are lengthened and slender; the longest toe contained 

 about two and one-half times in the distance from knee to tip. The inner 

 opiate 27, figs. 5-7; 35, fig. 12. 



