ZOOLOGY. 



C21 



Class, order, suborder, and family. 



Species. 



G. B. M 



CLASS CF TELEOSTOMES ou FISHES— Continued. 

 Order Teleoccphali — Continued. 



ricnroDPctidsB (L).) 



(Suborder neterosotnafej.) 



(Til 



Icida) . 



GastCTosfpid.'C (D ). 



Kistiilai ii la; 



Ceutiisi.itla) (D ). . . 



Order HeinibrancJiii. 



: Svii!:iiath:d:p (D.). 

 Hippocampidro ... 



Order Lophohranchii. 



[ Balistidae' 



I Ostraciontidae 



Order Flectognathi. 

 (.Suborder Sclerodernii.) 



CTetrodontidro". 

 < Diodontidce'^ ... 

 (AIolidao2 



(Suborder Ostracodermi.) 

 (Suborder Gymnodontes.) 



( Anteniiariidce. 



I CcratiUice 



■j Lopbiidiu^,... 

 I Ualtheidce 



Order Pediculati. 



Genera. 



G.B. M, 



CommoD. 



Sp. Gen. 



' Sclerodermi D. 



5 Pediculati D. 



'Gymnodontes U. 



Some interesting- and curious deductions flow from a comparison of 

 the data embodied in these tables. 



The freshwater fishes are mostly very difierent in the two regions. 

 The British isles are not distinct from the neighboring continent, so far 

 as its fishes are concerned, and almost all are conspecific with conti- 

 nental forms, the only diflerence being that there are fewer species and 

 an absence of some characteristic European types. Massachusetts and 

 its neighbors exhibit a similar relation to the rest of the American con- 

 tinent, in the paucity of species as well as deficiency of peculiar Ameri- 

 can types, and this feature is so well marked that more than a quarter 

 of a century ago Professor A gassiz denominated the region the "Zoolog- 

 ical island of ^ew England." Both regions, however, so far as the fau- 

 nas go, are true to their continents. Notwithstanding the so much 

 talked of small size of the British area, the fishes of the same diversiform 

 families are on the whole larger than those of America, or, in more 

 exact terms, there is a lack of the very small species. The special 

 Briti.sh Cypriiiids and Percids, for example, are larger than those of 

 Kew England, and none are as small as the peculiar Ameiican t> pes, 

 such as the little minnows, shiners, and darters. (It may be ivmarkcd 

 that for size, the suckers take the place of the large European Cypri- 



