4«4 



PATAGONIAN EXPEDITIONS: ZOOLOGY. 



Order PLECTOGNATHI. 

 Family TETRAODONTIDiE. 



COLOMESUS Gill. 



Batrachops Hollard. 



Type : Tetrodon psittacus Bloch & 

 Schneider. 



Range: Marine and fresh waters of 

 tropical America. 

 Ai. Colomesus psittacus (Bloch & Schnei- 

 der), J. & E., 1740. 



Cherlichthys asellus Miiller & Troschel. 



Habitat: West Indies; Guiana to 

 Maraiion and Para. 



Lagocephalus Swainson. 

 Physogaster and Gastrophysus Miiller ; 

 Promecocephalus Bibron ; Tetrodon 

 Gill. 

 Type: Tetrodon pennanti Yarrell = Te- 

 trodon lagocephalus Linnaeus. 

 Habitat: Chiefly tropical seas. 

 1. Lagocephalus Ucvigatus (Linnaeus). 



Tetrodon curvus and mathematicus 

 Mitchill; Holocanthus melanothus 

 Gronow ; Tetrodon lineolatus Poey. 

 Habitat: Cape Cod to Brazil, entering 

 rivers; Para. 



Number of Spe- 

 cies in the En- 

 Families, tire Area. 



Petromyzonidae 5 



Galeidae 2 



Rajidae 2 



Narcobatidae 1 



Myleobatidae 1 



Dasyatidae 9 



Lepidosirenidae 1 



Lepisosteidae 2 



Aspredinidae 22 



Diplomystidae 1 



Siluridae 300 



Hypophthalmidae 2 



Pygidiidae 66 



Callichthyidae 34 



Loricariidae 208 



Cyclopidae 23 



Catostomidae 5 



Cyprinidae 21 



Characidae 659 



Gymnotidae 31 



Electrophoridae 1 



Synbranchidae 1 



Anguillidae 1 



Engraulidae 13 



Clupeidae 5 



SUMMARY. 



Number of Spe- Number of Spe- Number of Spe- 

 cies in the Am- cies in the En- cies in the Am- 

 azon Basin. Families. tire Area. azon Basin. 



Dorosomidae 4 



Elopidae 2 



Osteoglossidae 1 I 



Arapaimidae 1 1 



Paeciliidae 160 14 



5 Galaxiidae 7 



I Aplochitonidae 2 



Belonidae 8 4 



IO Mugilidae II I 



Atherinidae 33 



139 Polycentridae 3 



I Centropomidae 8 3 



28 Serranidae 5 



16 Haemulidae 8 



81 Sciaenidae 13 7 



15 Percidae 1 



Cichlidae 187 55 



Carangidae I 



317 Gobiidae 27 8 



22 Batrachoididae 2 2 



I Blenniidae 1 



I Pleuronectidae 2 



Soleidae 12 4 



7 Tetraodontidae 2 1 



3 Totals 191 7 748 



