ELYSIID^. 389 



Near Hermgea ; branchiae leaf-like, with distinct foot-stalks ; 

 anus lateral ; penis long, without sting. 



Stiliger, Ehrenb. 



Sny. — Calliopaea, Orb. 



Distr. — 5 sp. Red Sea, Europe, Massachusetts. S. modestus, 

 Ehrenb. 



Form of the body like that of Galvina; rhinophores simple, 

 tentacles tuberculiform ; dorsal papillae club-shaped ; foot 

 rounded in front. Penis armed with a sting. 



Herm^a, Loven. 



Distr. — 9 sp. Norway, Britain, etc. H. dendritica, Alder 

 and Hancock (xci, 37). 



Animal elongated, tentacles folded longitudinally ; papillae 

 numerous, arranged down the sides of the back; sexual orifice 

 below right tentacles ; vent dorsal, or sublateral, anterior. 



Cyerce, Bergh. 

 Distr. — 2 sp. Pelew Islands. G. elegans, Semper. 

 Vent dorsal ; foot transversely bipartite ; penis short, 

 armed with sting. 



Embletonia, Alder and Hancock. 



Etym. — Dedicated to Dr. Embleton, of Newcastle. 



Syn. — Pterochilus, A. and H. 



Distr. — 4 sp. Scotland (2 sp.). In the littoral and laminarian 

 zones. E. pulchra, A. and H. (xci, 38). 



Animal slender ; tentacles two, simple ; head produced into a 

 flat lobe on each side ; papillae simple, subcylindrical,in a single 

 row down each side of the back. 



Tergipes, Cuvier. 

 Example. — T. despectus, Alder (xci, 39). 



Tentacles subulate, smooth ; branchiae in a single row on 

 each side, each with a sucker-like extremity ; foot rudimentary. 

 Spawn kidney-shaped. 



FiLURUS, DeKay. 



Distr. — F. dubius, DeKay. 



Foot stunted ; body slender ; tentacles two ; mouth on a loose 

 fringe of skin with two small oral feelers ; papillae in two long 

 rows down the back. 



Family ELYSIID^. 



- Animal shell-less, limaciform, with no distinct mantle or 

 breathing-organ ; respiration performed by the ciliated surface 

 of the body ; mouth armed with a single series of lingual teeth ; 



