78 



and it is only in view of its close resemblance in pattern of coloration to 

 tephrocotis var. littoralis, the corresponding connection of their habitats, 

 and the correlation of their difference in size to a recognized law of 

 latitudinal variation, that we are induced to subordinate its rank. We 

 must frankly state, however, that we have yet to see a specimen which 

 is really intermediate between the two forms, while, if they were not 

 distinct, such should occur in the very large collections of the two which 

 have been examined. This, taken in connection with the fact that typical 

 examples of the two were taken together at the same time (Kadiak, 

 February — Bischoff), is almost sufficient to justify their separation 

 specifically, which will have to be done in case connecting specimens do 

 not eventually turn up. 



List of specimens. 



