68 PROCTONOTID^E. 



Genus PROCTONOTUS, Alder and Hancock. 



Head covered with a small semi-lunar veil; tentacles 

 linear, not laminated ; labial feelers elongated. Gills ovate, 

 warty, arranged along the sides of the back, and continuous 

 in front above the head. 



Syn. Venilia, Alder and Hanc. Zephyrina, Quatref. 



Ex. P. mucroniferus, Alder and Hancock, pi. 65, fig. 3. 



The animals of this genus have horny jaws, the tentacles 

 are wrinkled and somewhat tubercular, and the branchiae 

 are tuberculated and arranged in rows ; the species inhabit 

 shallow water along the shores. 



Species of Proctonotus. 



rnucrouiferus, Alder and pilosus, Quatref. 



Hanc. 



Genus JANUS, Verany. 



Head covered by a small veil ; tentacles perfoliate, arising 

 from a single, large peduncle or crest. Gills cylindrical, 

 simple, crowded, arranged along the sides of the back, and 

 continuous above the head. 



Syn. Antiopa, Alder and Hancock. 



Ex. J. cristatus, Delle Chiaje, pi. 65, fig. 4. 



The crest between the dorsal tentacles distinguishes this 

 genus from Proctonotus ; the mouth is furnished with 

 corneous jaws, the tentacles are clavate and lamellated. 



Species of Janus. 

 cristatus, Delle Chiaje. hyalinus, Alder and Hanc. 



