NATURAL SCIENCES OF PHILADELPHIA. 105 



Plicffi 12 ; inner toe and joint distinct, otlier toes well developed, cylindric ; 

 widtli head 5 to 6 times head to axilla, 2-5 to 3 times to groin ; tail generally 

 more elongate ; black, sides, tail, and often back, grey varied ; larger. 



S. 1 e p r o s u s. 

 Plicte 11 ; inner toe not distinct, other toes very short, margined ; width of 

 head 4 2-5 to axilla, 1-3 to groin ; tail short ; black, unspotted ; medium. 



S. c e p h al i c u s. 



II. Vomerine teeth not continued posteriorly to the pterygoid patches, nor 



exteriorly to beyond the nares. 

 a. Tail round, costal grooves 11 — 12, inner toes rudimeutal. 

 Plicae 11 (without inguinal) ; width of head 45 length to axilla, 2-5-6 times 

 in length to groin; tail rather short; upper lip more or less truncate and 



angulate S. c h i r op t er u 3. 



aa. Tail subround, costal grooves 21, inner toes minute. 

 Width of bead near 1-Y length to axilla, -33 of length to groin ; limbs 

 short; tail thick at base; brown, dorsal region darker; small. 



S. multiplicatus. 

 aaa. Tail compressed, costal grooves 13 — 14, inner toes longer. 

 Plicae usually 14; width of head less than one-sixth to groin ; head to ax- 

 illa well over -33 of the same; body longer, tail not keeled above proximally, 

 comparatively short, vomerine series turned obliquely backwards. Yellow, 

 with two latero-dorsal black lines; tail dark laterally; belly immaculate; 

 small S. b ill n eat us. 



Plicae 13 ; width of head equal one-sixth length to groin ; muzzle to axilla 

 more than one-third the same; tail long, keeled above. Yellow, sides 

 many black spotted, a median dorsal series of spots ; tail yellow, black bar- 

 red ; belly immaculate ; large S. longicaudus. 



PlicfB 13 ; width of head greater than one-sixth length to groin ; from 

 muzzle to axilla considerably more than -33 length to groin ; tail long, 

 keeled above. Yellow, with three black bands; tail black, yellow barred ; 

 belly mottled; large S. g ut t o 1 i ne a tus. 



III. Vomerine series of teeth continuous posteriorly, with the pterygoid 



brushes, and originating behind nares. 

 Costal plica; 15 — 16; head wide, not more than seven times to groin, not 

 more than twice to axilla; no canthus rostralis; tail rounded at base, not 

 finned; large; Vermillion red, black or brown spotted S, ruber. 



Spelerpbs bellii Gray. 



Catalogue British Museum, p. 46. Cope, Proc. Acad. N. Sci. Phil. 1860, 

 372. (Edipus platydactylm " Tsch." Baird, Journ. Acad. Nat. Sci. Phila. 1850, 

 pp. 282, 286. Bolitoglossa 3Iexicana Dumeril, Bibron Erp. Gen. ix, 93, 1854 

 (exclus. synonymy). 



North Eastern Mexico. 



Spelerpes leprosus Cope. 

 Species nova. 



This salamander is one of the numerous additions made to herpetology by 

 Sumichrast's explorations in the mountains of Eastern Mexico. Of the seven 

 species of Urodeles which he found in that region, this appears to be the 

 third in size ; it approaches in this respect, and in some degree in coloration, 

 the Plethodon glutinosus. 



The form is stout, the head broad with short muzzle, and the tail cylindric 

 and glandular ; it is not unfrequently swollen at the base. In the largest 

 specimens, selected as the stoutest, the length of the head from the postorbital 

 line is only 3-5 the width at the same point. The fore limb extended reaches 

 to the posterior margin, or to the middle of the orbit, for in extreme speci- 



1869.] 



