132 FISHES. 



Order 6. PLECTOGNATHI. 

 Fam. SCLERODERMI. 



240. Balistes maculatus Gm. 



241. Balistes capriscus Gm. Pig-faced Trigger-fish. 



File-fish. 



Fam. GYMNODONTES. 



242. Tetrodon lagocephalus L. Crop-fish, or Pen- 



nant's Globe-fish. 



243. Orthagoriscus mola (Z.). Short Sun-fish. 



Casual visitant of rare occurrence. 



Scarborough, an adult cast ashore weighing 120 lbs., now in 



the Museum, figured by Yarrell (Ed. 3, vol. ii., p. 432). 

 Redcar, one (Meynell, 1844). 

 Bridlington, two or three (Meynell, 1844). 

 BridHngton, one, Sept. 5th, 1840 (Boynton, MS.). 

 Bridlington, one, Sept., 1855 (Boynton, MS.). 

 Bridlington Bay, one caught, August, 1880 (Boynton, MS.). 



244. Orthagoriscus truncatus {Retz.). Oblong Sun-fish. 



Sub-class 3. CYCLOSTOMATA. 



Fam. PETROMYZONTID^. 



245. Petromyzon marinus L. Sea-Lamprey. 



Resident, not uncommon on the coast ', has been caught in 

 the Ouse. 



246. Petromyzon fluviatilis L. Lampern. River-Lam- 



prey. 



Freshwater resident, generally distributed and abundant. 

 Some of our correspondents allude to this species as being 

 migratory, and in one or two instances give dates of 

 arrival and departure. The Dutch fishermen have for more 

 than a century visited the Ouse for the purpose of pur- 

 chasing these fish for bait. 



