236 • DOTONID^. 



The figure referred to is copied from an original drawing by IMr. 

 B. F. Nutting, the same used by Captain Couthouy for the plate in 

 the Boston Journal. 



Family DOTONIDiE. 



Tongue narrow, teeth in a single central series. Tentacles 

 sheathed r.t the base, retractile. Gills superficial, fusiform on the 

 sides of the back. 



The armature of the lingual membrane in this family differs from 

 that of the other groups, in having a single central series of teeth, 

 and the tentacles are retractile, and furnished with sheaths at their 

 bases. There are two genera, which inhabit the Laminarian Zone. 



Oeiius DOTO, Oken. (1815.) 



Body elongated, without a mantle. Tentacles elongated, cylin- 

 drical, retractile into broad, trumpet-shaped sheaths. Branchiae 

 numerous, ovate or club-shaped, tubercular, in a single range along 

 each side of the back ; a small simple frontal veil. 



Doto coronata. 



Plate XVI. Figs. 233-237. 



Animal yellowish, dotted with red; veil sqiuare in front; branchiae five to 

 seven on each side, ovate club-shaped, bearing several circles of papillae with 

 dark red tips. 



Doris coronata, Gmelin, i. 310.5, No. 19. * 



Tritonia coronata, Lamarck, An. sans Vert. (2d ed.) vii. 454. 



Tevfjipes coronata, D'Orb. in Mag. de Zool. 1837, v. pi. 103. 



Sclllrea punctata, Boucii. CiiAXT. Moll, dc Boul. 



Mellhma coronata, Johnst. Ann. Nat. Hist. i. 117, pi. 3, figs. 5-8. 



Melihma ornata, Alder and Hancock, Ann. Nat Hist. ix. 34. 



Melihan arhi(scitla, Agassiz, in Proc. Bost. Soc. Nat. Hist. iii. 119 (without dcscr.). 



Doto coronata, Lovex, Arch. Sknnd. Nat. 151 ; Ind. Moll. Scand. 7 ; from Ofvcr. af K. 



Vet. Akad. Furh. 1846. — Stimpson, Mar. Inv. Gr. Manan, 2G ; Check Lists, 4 (1860). 



— Alder and Hancock, Monog. Ntidih. Moll. Fam. 3, pi. 6 (Syn. D. pinnalifiJa, 



cxcl.). — CiiExu, Man. de Conch, i. 409, fig. 3066. — Woodward, Man. of Mol- 



lusca, pi. 13, fig. 11. — Adams, Gen. ii. 70, pi. 65, fig. 5. 



Body slender, gradually tapering backwards, convex above, pale 

 rose-color thickly dotted with dark lirown ; foot as wide as the 

 body. Tentacles thread-lilce, the sheath simple trumpet-shaped and 



