92 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



quite evident. In the smallest specimen of 3998 are visible numerous 

 rounded, irregularly disposed liglit spots on the lower part of the sides, 

 with some scattered over on the belly, averaging half the size of the eye, 

 but with faintly defined margins. Some scattered ones are seen on the 

 side of the tail. These may be ])lumbeous or bluish in life. In the largest 

 specimen of 3979, Eipley, Ohio, these bluish spots are quite evident 

 on the side of body and tail. 



Generally the ground color of the alcoholic specimen is lead-colored 

 to olive brown and blackish; light beneath. The color of the living 

 animal is similar to that seen in alcoholic specimens. Specimens have 

 been found at localities rather distant from each other of a dark brown 

 color, with a lateral shade of a still darker hue. Such specimens are 

 of the stouter typo of the species as to proportions. Of two speci- 

 mens from Clark County, Va., the width of the head enters the length 

 to the groin 4^ times in one specimen, and the other but little over four 

 times. Other specimens are from Saint Catherine's, Ontario, in the 

 National Museum, and from southern Indiana in the Philadelphia 

 Academy. They have been referred to as distinct species and described 

 as Amhlysioma fuscum by Hallowell, but I cannot find any characters 

 to distinguish them from the A. jeffersoniamim proper. Tliey resem- 

 ble almost exactly the A. copeamim in color, but differ entirely in pro- 

 portions. In that species the body is not longer than the length ante- 

 rior to the axilla, while in this one the former dimension much exceeds 

 the latter, 



e 7 ^^ — ^ ** 



riG. 10. Amhlysioma jpffrrsonianvm, typn of vnr. /?(.sr7/w.. No. 3897. Clarke CoiiBty, Va. 



A specimen of A. jeffersoniamim about 2 inches long is not mate- 

 rially different from the adult, although the two inner palatine patches 

 are more arched. 



Amblystoma jeffersoniamim, laferale Hallow. 



Amhlysioma laterale, Hallow., I, c, j). "352. 



AmMijstoma jeffa-sonimnim, var. 7«/fr«ie Cope 7. c, Bonleiiger; Cat. Batr. Grail. Brit. 

 Mas., eii. II, 1882, p. 47. 



This form is quite distinct from the typical A. jefersoniamim, and 

 would rank as a species were it not that its character and those of tliO 

 latter interblend. In typical specimens of the A. j. laterale the head is 

 narrower and tlic body more slender. When the limbs are laid along 

 the sides they frequently do not meet by a short interval, while those 



