54 



Dr. E. von Martens on the Occurrence of 



I. 



Green 

 land and 

 Iceland 



II. 

 Scandi- 



III. 



Central 

 Europe. 



IV. 



Southern 

 Europe. 



V. 



Torrid 

 zone. 



Crustacea''. 

 podophthalma... 



Tetradkcapoda.. > 

 Gnathostoma ... 



CORMOSTOMA 



Mollusca. 



Gastkbopoda 

 ctenobranchia. 



Gasteropoda 

 pulmonata, 



' Brachyura in general. 



Thelphtisinea , 



Astacidea 



Caridea 



Idoteidea 



Oniscidea 



Cymothoidea 



Gamraaridea 



Cyclopoidea 



DapJinoidea 



Cyproidea 



Artemioidea 



Apodoidea 



Limnadioidea 



J Caligoidea 



1 Lernaeoidea 



CONCHIFBRA 



r Melaniacea}^ . 

 < Paludinacea^^ . 



[Neritacea 



J Limnceacea .... 

 \ Ampullariacea. 

 f Mytilacea 



IArcacea • 

 Najadea 



•^ Cycladea 



Tellinea 



I Solenacea 



I^Pholadea 



m 

 o 



m 

 m 



?ii 



m 



ml 

 t 







m 

 m 







t? 







t 







m 

 m 







t 

 m 





 



(S.Am.io) 



t 

 t 



} 



? 



t 

 t 



t 

 N. Am.f 



m 



t 

 t 

 m 



.,.12 

 t 

 t 



t 



t 



t 

 t 



4 



t 



t 

 14 



15 



4 



Remarks, 



1 . Tropical species of Gasterosteus or Cotttts are unknown to me. 



2. Sclimarda (Geogr. Verbreitung der Thiere, p. 59) speaks of 

 Sea Mullets in the pond near Arcach ; this is unknown to me. 

 In a lake near Arqua (not far from Padua), sea fishes are to be 

 found according to a popular tradition. Species of Mugil are 

 often kept in Italy in brackish water ponds, and in France they 

 ascend the rivers in abundance (see Valenciennes), but I do not 

 know how far they go into pure fresh water. In tropical 

 countries, Mugil liga, Nestis, and Dajaus occur in fresh water. 



3. Campylodon in the Greenland Sea ; Mastacemblus in Indian 

 rivers and even near Aleppo (Russell). 



4. See p. 51. 



5. Platessa flesuSy according to Nilsson, ascends in Sweden as 

 far as the peat moors of Jaeravallen, and probably in the Rhine 

 as far as Bonn, as Dr. Giinther has had the kindness to inform 

 me from the statements of fishermen. The nearly allied Passara 

 {PL passer J Bp.) ascends the Po even into the small rivers Tar- 



