OF MOLLUSCA. 223 



4. G. Forsteri, t. 202. f. 3. Fig. 120. — Teeth of 



5. G. Eucharis, t. 201. f. I, 6 ; Voy. Bonite, Glaucus hexaptery- 



t. 24 24* anat. ^ ?ws * 



6. G. Pacificus, t. 201. f. 4, t. 202. f. 1, 2, 7. 



Laniogerus Elfortii, t. 231 . f. 13, is supposed to 

 be only a Glaucus which has lost its gills ; t. 20 1 . 

 f. 2 & 5, from Dr. J. Hooker's MSS., are proba- 

 bly the same. 



" Central tooth of Glaucus hexapterygius 

 strong, plate-like, adpressed, base in front on each 

 side produced into a long horn ; cutting edge 

 one-pointed, pectinated on each side (fig. 120)." 

 — Loven. 



§§ The hinder vessel of the g astro-hepatic system above the ovary. 



Fam. XVII. EOLIDID.E. 



Mantle obsolete. Tentacles four, non-retractile, variable. Gills 

 simple, papillose or linear. Vent lateral. Jaws distinct. The pos- 

 terior vessel of the gastro-hepatic system above the ovary. 



1. Calma. 



Body depressed, rather broad. Tentacles small, simple, linear. 

 Branchiae linear, fusiform, clustered on cylindrical footstalks. Foot 

 broad ; anterior angles acute. Lingual membrane small, narrow, 

 with a single series of spines. 



1. C. glaucoides. 



2. Flabellina. 



Body linear, slender. Tentacles four ; dorsal laminated ; oral 

 elongate. Gills linear or fusiform, clustered on footstalks. Foot 

 narrow ; anterior angles much produced. Lingual membrane with 

 a central spine. with marginal denticles, and two separate plain lateral 

 spines. Spawn in many coils. 



1. F. affinis, t. 198. f. 13. 



2. F. punctata, t. 206. f. 2. 



3. F. pedata, t. 195. f. 9. 



4. F. Drummondii, t. 273. f. 1 = E. tenuibranchialis and E. curta, 



Alder fy Hancock. 



5. F. Cuvieri, t. 195. f. 1, 10. 



6. F. Bostoniensis, t. 196. f. 3. 



3. Facelina. 



Body rather slender. Dorsal tentacles laminated ; oral tentacles 

 long. Branchiae linear or fusiform, clustered. Foot narrow, with 

 the anterior angles acute and much produced. Lingual membrane 



