340 



THE AMERICAN NATURALIST [Vol. XLI 



(HeterodontidcB) 

 SqualidoB, 



\ SquatinidcB. 



Suborder 2, Hypotrema 

 Di\dsion, Narcobatoidei 

 Family, Torpedinidce 

 Division, Batoidei 



Families, Rhinobatidce, 

 Raiidce, 

 Dasybatidce. 

 vSeries II. Chasmatopnea, 

 Order, Ilolocephali, 

 Family, Pyctodontidce (extinct) 

 Squaloraiidce (extinct) 

 Myriacanthidoe (extinct) 

 Chimccridae 



The principal feature of this arrangement is the grouping together 

 of the Cestraciont and Squaloid sharks as a division corresponding 

 to the Galeoidea. Except for the reduction of some families to a 

 lower rank, and a few changes in names of groups, this corresponds 

 fairly with that adopted by recent American writers. 



Under Diagnoses of New Central American Fresh Water Fishes, 

 Mr. Regan describes Rivulus flabellicauda, from Costa Rica, Rivulus 

 godmanm, from Guatemala, Pacilia salvatoris, from San Salvador, 

 Xiphophorus strigatus, from Vera Cruz and Oaxaca, X. brevis, from 

 Honduras, Agonostomus macracanihus and A. snlvini, from Guate- 



In the Anatomischer Anzeiger, Dr. l ine I )aliltj;reii describes the 

 anatomy of the electric organs on the top of the head in the Electric 

 stargazer, Astroscopiis y-gra;cum. 



These very interesting organs constitute a new type of electric 

 organs, quite different from those of the torpedoes and other electric 



In the Proccpdi.ics cf the Aca.lcmy of Natural Sciences of Phila- 

 delphia, Henry \V. Fnu Irr .h-. nl..-s ( •r>,trupnw„s <,ahln as a new species 

 from San Donii.i-.,, ami ('. hrrim/l, fror.i Siirina.n. He gives a list 

 of the cold-blooded vcrtcl.ral.^s ohlainr.! about tlx- Florida Keys. 

 Eighty-six species of fislic^ arc ivi-ordcd, one of tliciu n-o-arded as 

 new. This is Con^m ?///// //.V inonm'. w hii li sccius to 1 Ii(m\ riicr a s|)c- 

 cies of Darfyln.tropii.s, not evidently dilfcrrut from / )acti/l(,.sr(>pii.s' tri- 

 digifatvs, found by him at Key W(>st. 



