OF MOLLUSCA. 211 



10. Heptabranchus. 

 Gills tree-like, in a broad lunate series. Teeth 

 1. H. Burnettii, t. 219. f. 2. 



B. Body more or less compressed. Mantle small, sometimes obso- 

 lete, often furnished with marginal beards. Tentacles variable. 

 Jaws sometimes distinct (p. 206). 



a. Lingual membrane narrow, with four longitudinal series of teeth 

 (pp. 213 & 214). 



Fam. III. GONIODORID.E. 



Body angular, depressed. Mantle small or obsolete, with waved 

 or scalloped edges, spiculose. Dorsal tentacles laminated, non-re- 

 tractile ; oral tentacles flattened. Gills not retractile. Lingual 

 membrane narrow. Tongue with four longitudinal series of spines ; 

 no central series ; buccal collar spinose. 



* Mantle edge simple. 



1. GONIODORIS. 



Body depressed ; cloak distinct, with a waved or scalloped edge. 

 Dorsal tentacles laminated ; oral tentacles flattened. Lingual mem- 

 brane narrow, with four series of plates, the two medial each with a 

 large central spine ; no central plate ; buccal collar spinose. — Alder. 

 Gill lanceolate, pinnate, non-retractile. 



1. G. nodosa, t. 69. f. 10, t. 227. f. 1, t. 231. f. 3, 5, t. 268. f. 9 ; 



Forbes fy Hanley, B.M. t. V.V. f. 3. 



2. G. marginata, t. 223. f. 3. 



3. G. castanea, t. 220. f. 2, t. 222. f. 1. 



4. G. pulcherrima, t. 232. f. 1. 



5. G. Villefranca, t. 232. f. 2. 



6. G. elegantula, t. 231. f. 7. 



7. G. purpurea, t. 234. f. 4. 



8. G. picta, t. 213. f. 4, t. 231. f. 17. 



9. G. cserulea, t. 229. f. 2, t. 231. f. 10. 



10. G. albescens, t. 229. f. 3. 



11. G. marmorata, t. 64. f. 14. 



12. G. Webbii, t. 232. f. 5. 



13. G. impudica, t. 232. f. 4. 



14. G. tinctorum, t. 69. f. 5. 



15. G. obsoleta, t. 69. f. 4. 



16. G. pallida, t. 69. f. 3. 



17. G. infuscata, t. 69. f. 2. 



18. G. pulchella, t. 66. f. 2. 



19. G. atromarginata, t. 64. f. 4, 10, t. 180. f. 



20. G. lemniscata, t. 223. f. 6. 



p2 



