CATALOGUE 



OF THE 



SPECIMENS OF NATURAL HISTORY IN SPIRIT. 



PART II. 



DIVISION VERTEBRATA. 



Class PISCES. 



Order I. DERMOPTERI. 



(Marsipobranchii, pars, Bonap. Chondropterygiens Cyclostomes, Cuvier.) 



Endoskeleton unossified ; exoskeleton and vertical fins muco-dermoid : body 

 vermiform, abrachial and apodal : no pancreas ; no air-bladder ; no oviducts 

 or sperm-ducts : peritoneal outlets. 



Suborder PHARYNGOBRANCHII seu CIRROSTOMI. 

 Gills free, pharyngeal, inoperculate : no heart. 



Family AmphioxidoB. 

 Genus BRANCHIOSTOMA, Costa. AMPHIOXUS, Yarrell. 



No. 



1 . The Lancelet (Branchiostoma lubricum, Costa ; Amphioxus lanceo- 

 latus, Yarrell). 



