634 APPENDIX. 



Genus CUTHONA, Alder and Hancock. 



(Sub-fam. ^olidin^.) 



Body depressed. Head much produced at the sides ; tentacles 

 simple, linear. Gills clavate, in close-set rows. Foot broad, 

 rounded in front. 



Ex. C. nana, Alder and Hancock. 



Genus GALVINA, Alder and Hancock. 



(Sub-fam. ^eolidifle.) 



Body stoutish. Tentacles linear, slender; labial feelers short. 

 Gills in rather distant rows, fusiform, inflated. Foot with tbe 

 anterior angles rounded. 



Ex. G. tricolor, Forbes. 



To this genus Messrs. Alder and Hancock also refer the species 

 cingulata, which, as well as tricolor, we had included in the genus 

 Montagua. 



Vol. ii. p. 79. Genus CLCELIA. 



This genus, which is synonymous with Hero of Loven, is 

 distinct from Embletonia of Alder and Hancock, and Dr. Gray, 

 from its peculiarities, has established a family to receive it. 



Fam. HEROID^. 



Mantle obsolete ; frontal veil rather large, plain, produced at 

 the sides. Tentacles two, linear, simple, not retractile. Gills 

 branched or umbellated. Lingual membrane with a central 

 series of large denticulated spines, and two series of simple 

 lateral teeth. Jaws corneous. 



Genus HERO, Loven. 



Body slender. Mantle adnate ; labial veil ample, produced 

 on both sides into an oblong lobe. Tentacles simple, unpro- 



