JEOhWJE. 385 



GLAUCUS (restricted). Includes the larger species; head small; 

 body slender, with long tail ; arms rather short, with the papillas 

 in one row ; penis with a horny hook. 5 sp. Atlantic and 

 Pacific Oceans. 



GLAUciLLA, Bergh. Size smaller; head strong; bodj^ bulky, 

 with short tail ; arms more prominent, with the papillae in sev- 

 eral rows ; penis without hook ; no large urticating threads. 2 

 sp. Northern and Southern Pacific. 



LANIOGERUS, Blaiuv. Elongated, subcylindrical ; thick and 

 wide anteriorly, narrower and thinner behind ; having on each 

 side a series of smooth, finely pectinated lamellae, divided into 

 two parts ; four conical tentacles ; generative and anal orifice 

 upon the right side. G. Elfortii, Blainv. (xci, 29). 



Subfamily ^OLIN^. 



Foot large ; branchiae in ranks on each side. 



JEoLis, Cuvier. 



Etym. — jEoUs, daughter of JEolus. 



Syn. — Psiloceros, Menke. Eubranchus, Forbes. Amphorina, 

 Quatref. 



Distr. — Norway, Britain (33 sp.). United States, Mediterra- 

 nean, South Atlantic, Pacific. ^. papillosa, L. 



Animal ovate ; dorsal tentacles smooth, oval, slender ; papillae 

 simple, cylindrical, numerous, depressed, and imbricated ; mouth 

 with a horny upper jaw, consisting of two lateral plates, united 

 above by a ligament ; foot narrow ; tongue with a single series 

 of curved, pectinated teeth ; spawn of numerous waved coils. 



Found amongst rocks at low-water; they are active animals, 

 moving their tentacles continually, and extending and contract- 

 ing their papillae ; they swim readily at the surface, inverted. 

 They feed chiefly on sertularian zoophytes, and if kept fasting 

 will devour each other ; when irritated they discharge a milky 

 fluid from their papillae, which are very liable to fall off. 



FACELiNA, Alder and Hancock. (Acanthopsole, Trinchese.) 

 Body rather slender, rhinophores perfoliate ; anterior angles of 

 the narrow foot assuming the form of tentacles ; middle part of 

 the jaw strongly denticulated. (Nearly identical with Phidiana, 

 Gray.) F. coronata, Forbes (xci, 30). 6 sp. Europe. 



PHIDIANA, Gra3^ Labial tentacles subulate ; branchiae on both 

 sides of the back, composed of cylindrical lobes, forming trans- 

 verse rows for the whole length of the mantle ; orifice tubercular, 

 on the right side, below the first row of branchiae ; edge of jaw 

 with a single row of denticles, and the radula has but few teeth, 

 arranged in a single longitudinal row. Penis pointed. P. Inca, 

 d'Orb. (xci, 32). 



HERMissENDA, Bergh, 1878. Near Phidiana, but anterior angles 



