78 HERMiEIDiE. 



crenate margin on their inner sides ; the anterior or oral 

 tentacles, moreover, are situated considerably behind the 

 lips, and the orifices of the reproductive system are separate, 

 and situated below the tentacles on the right side. 



Fam. ttERMmmm. 



Body elongated, not provided with a distinct mantle. 

 Mouth unarmed, or with corneous jaws ; tentacles sometimes 

 wanting; when present two, dorsal, non-retractile. Gills 

 papillose. Vent usually central, on the posterior half of the 

 back ; genital orifice at the right side. 



The dorsal position of the vent, and the indistinct mantle 

 distinguish this family from JEoJididce, and the presence of 

 papillose gills from Elysiidce; perhaps those genera with 

 horny jaws belong to a distinct family. 



Genus HER1NLEA, Loven. 



Tentacles two, longitudinally folded; head without lobes. 

 Gills elongate, papillose, smooth, arranged along the sides of 

 the back. 



Ex. H. dendritica, Alder and Hancock, pi. 67, fig. 2. 



The sides of the gills are simple, and the tentacles are 

 folded on themselves. The species inhabit the littoral and 

 laminarian zones, and are sometimes found gregarious on 

 Codium tomcntosum. 



Species of Herman. 



bifida, Mont. venosa, Loven. 



dendritica, Aider and Hanc. 



