FISHES. 
171 
Subclass I. LEPTOCARDII. 
Fam. Cirrostomi. 
Genus Branchiostoma, Costa. 
Branchiostoma lanceolatum , Pall.; Gunther, Catalogue of 
the Fishes in the British Museum, vol. viii. p. 513. 
Rare. Two specimens occurred in the stomach of a cod. 
Subclass II. CYCLOSTOMATA. 
Fam. Petromyzontid®. 
Genus Petromyzon, Artedi. 
Petromyzon marinus , L.; Gthr. op. cit. viii. p. 501. 
Not uncommon. One was captured by attaching itself to 
boat. 
Fam. Myxinid®. 
Genus Myxine, L. 
Myxine glutinosa , L.; Gthr. op. cit. viii. p. 510. 
Occasionally on the cod. 
Subclass III. TELEOSTEI. 
Order I. Acanthopterygii. 
Fam. Gasterosteidae. 
Genus Gasterosteus, Artedi. 
Gasterosteus aculeatus , Albert. Mag.; Gthr. op. cit. i. p. 2. 
Frequent on the West Sands after storms. 
Gasterosteus spinachia , L. ; Gthr. op. cit. i. p. 7. 
Abundant in the rock-pools. 
z 2 
