78 



DE. G. H. FOWLEE — BISCATAN PLANKTON : 



Krohnia stjbtilis, Grassi. (PI. 6. figs. 50-52.) 



Characters. — -Head of moderate size ; body extremely long and slender, transparent, 

 not firm and rigid like hamataat a corresj)onding length; thickest at about the middle of 

 its length, but even here only slightly thicker than at the neck, the taper extremely 

 gradual. Neck fairly well marked ; a slight constriction at the septum. Lateral fins 

 very long, reaching from the vesiculiB seminales to a third of the distance between 



septum and ganglion, about two-thirds on the tail and one-third on the body, widest at 

 or in front of the septum ; fin-rays present throughout its length . Tail-fin truncate, 

 extending anteriorly to the vesiculse seminales. Jaws strongly curved, very sharp, 

 usually thin Avhen viewed from the outside. Teeth similarly thin plates, bayonet 

 shaped *. Vestibular ridge (apparently) absent ; corona ciliata not observed. 



* Compare Grussi, pi. i. figs. 9, 10. 



