648 PETROMYZONTID^E. BRANCHIOSTOMATID.E. 



86. Petromyzonfluviatilis, Linn. River-Lamprey. 

 Hob. British Rivers. 



87. Petromyzon branchialis, Linn. Fringed-lipped Lampern. 

 Hob. British Rivers. 



a. Presented by A. H. Cocks, Esq., P.Z.S., Feb. 12, 1881. 



Subclass LEPTOCARDII. 



Family BRANCHIOSTOMATID.E. 



Genus BRANCHIOSTOMA. 



88. Branchiostoma lanceolatum (Pallas). Lancelet. 

 Hob. Coast of Italy. 



a-r. Presented by the Director of the Zoological Station, 



Naples, Nov. 14, 1874. 



