THE BATEACHIA OF NORTH AMERICA. 



127 



This is the most vermiform North American salamander, reseinbling 

 the CEdij)ina tmiformis Keferst. of Central America in its proportions. 

 Its relations to the Batrachosejps attenuatus are close, but its difl'ereuces 

 may be siuumarlzed as follows: (1) The two patches of parasphenoid 

 teeth; (2) the absence of dorsal grooves; (3) the very elongate tail; 

 (4) the longer patches of vomerine teeth. The habitat of the B. caud- 

 atus is much north of any from which the B. attenuatus has been ob- 

 tained. 



t! tl 



Fig. 27. Batrachoseps caudatus, No. 13561. Hassler's Harbor, Alaska; \ except Fig. 5=f. 



Catalogue 

 number. 



li:l i^«-"^y- 



"When 

 collected. 



From whom received. 



Nature of speci- 

 men. 



13561 



1 



Hassler Harbor, Alaska 





Henry E. Nichols 











BATRACHOSEPS ATTENUATUS Esch. 



Bonap., Faun. Ital.; Hallow., Journ. Ac, Phila., iv, 1858, ]x 348; Cope, 

 Proceed. Ac. P^ila., 1869, p. 98; Straucli, Salam., p. 85; Gray, Cat. 

 Batr. Grad. Brit. Mus., ed. i, p. 42; Bonlenger, Cat. Batr. Grad. Brit 



Muc, ed. n, 1882, p. 60. 



Salamandrina attenuata, Eschscli., Zool. Atlas, p. 1, PI. 21, fig. 1-14. 



This species is well characterized by its slender form and its very 

 weak extremities. The costal folds are nineteen, more rarely twenty or 

 eighteen, and are well marked on the back and belly, and turned for- 

 wards toward the median line on the former, which is marked by a 

 delicate groove. There are four lateral folds in front of the fore limb, 

 three of which are crossed by a longitudinal fold from the orbit. The 

 tail is- longer than in any other North American salamander, except the 

 B. catidatus, and is entirely cylindrical, and undistinguishabie at the 

 origin from the body; it is marked by forty-seven distinct annuli to the 

 end of the vent. The toes are very small and obtuse, and free for the 

 length of only one phalange; below this a web connects them. The 

 inner toe on both feet is a mere knob. The extended fore limb reaches 

 the transverse fold behind the canthus oris; and the extended hind 

 limb covers four intercostal spaces. 



The head is short, broad, and flat, and the muzzle is as long as the 

 diameter of the orbit. The lip is more or less prominent below and be- 

 fore the orbits. The palatine teeth do not extend to behind the nares; 

 they form two very oblique short series, which nearly meet posteriorly 



