No. 436.] NORTH AMERICAN INVERTEBRA 7ES. 



Tribe Caprellidea. 



Head fused with die first segment of the thorax. Abdomen rudimentary. 

 Second gnathopods larger than the first. Usually gills are present only on 

 the third and fourth segments of the thorax. Anterior pairs of peraeopods 

 usually wanting. No pleopods. l/ropods rudimentary or wanting. 



Family Caprellidae. 



head by a dorsal depression. Antenna' elongated, the first generally 



