Sasaki: On Pike kko.m Sakhalin and Liiaus n-ulur.'ii (DynowsKi) 57 



respect u'itli that from Siberia, wiiich locality is, indeed, in the \'icinity of those 

 given by Pallas and Djbowski. As to whether in any characteristic the 

 Sakhalin form may exhibit the constant local variation with that of Siberia 

 can not well be ascertained, due to the lack of sufficient specimens available. 

 Howe\-cr, from the form of the river-system of Laka Baikal, ^vhich Dj'bowski 

 describes under a name L reichcrtii var. baicalcnsis}'^ the Sakahlin form 

 seems to differ distinctly in several points: i) In the Baikal form the 

 maxillaries, being longer than in that of Sakhalin extends to beneath the 

 centres of the eyes, 2) the scales in the longitudinal row along the mid- 

 lateral line of the body are less numerous, being 130-134, 3) th.e branchi- 

 ostegal raj's are of a decidedly greater number, being 15 or 16, ami 4) the 

 spots of the body and head are described as golden yellow, not black as 

 in the Sakhalin from. 



In respect to the relationship of L. reichcrtii to L. Indus, the preceding 

 paragraphs come into the conclusion, that there exists between them a marked 

 difference at least as regards the number of the scales of the mid-lateral line 

 of the body, in the osteology, and in the pattern of the head and body. No 

 explanation is needed as to whether the differences are of sufficient value to 

 retain L. rcichertii distinct from L Indus. Exx-nthough they may be separated, 

 their intimate relationship is still easily recognised by their similarity as 

 regards the general structure, in the squamition of the head, and in the 

 pattern of the fins. And L. reichcrtii var. baicaloisis alluded to stands between 

 them as an intermediate form, the intermediation chiefly appearing in the 

 number of the scales of the body, in the branchiostegal rays, and in the 

 pattern of the head and body. 



Pallas and Dybowski report them as inhabiting in the river-systems of 

 the Onon and the Ingoda, the upper tributaries of the Amur widely distri- 

 buted in Transbaikal of Siberia. According to Professor P>i the specimen 

 from Siberia at my disposal is probably from the river-system belonging to 

 the lower part of the Amur of Maritime Province. These habitats taken 

 together with Sakhalin roughly demark the distribution of the species into a 

 latitudinally extended area ranging from Lake Baikal on the west to Sakhalin 



ij Verh. Zocl. Bot. Ver., Wien, 1874, P- 39^. 



