234 tritoniidj:. 



Very like to A. cristata, Loven, differing chiefly in its greater 



Fig. 516. 



size, longer oral tentacles, the lower ori- 



gin of the tentacular processes, and the 

 greater number of branchial laminee. 

 Ova in a tape-like envelope, adhering to 



Ova of A. sulphurea. , . ^ ° 



rocks by one edge, m a loose, serpen- 

 tine manner. Some specimens are tipped with brown instead of 

 yellow. 



The figure referred to is from a drawing by Dr. Stimpson. 



Family TRITONIID^. 



Tongue broad, teeth many in each cross series ; jaws horny. 

 Tentacles retractile within sheaths. Gills superficial, fusiform, or 

 branched, on each side of the back. Vent lateral. Foot linear, 

 channelled. 



Many of the genera of this family are pelagic, and are often found 

 crawling on the fronds of floating algae, or clinging to the narrow 

 stems of gulf-weed, which is frequently met with in large masses at 

 considerable distance from the land ; these mimic forests, tenanted 

 by their singular Molluscan inhabitants, thus serve in some meas- 

 ure to enliven the solitudes of the ocean. 



Genus DENDRONOTUS, Alder and Hancock. 1845. 



Tentacles clubbed, lamellar, with branched sheaths ; hood of the 

 head furnished with branched appendages. Branchiaa ramose, in a 

 single range along each side of the back. 



Dendronotiis arborescens. 



Plate XXII. Figs. 311, 312, 313. 



Animal large, surface somewhat warty, pale reddish, marbled with brown, 

 cream-color and opaque white, occasionally Avhite; front with six branching- 

 fringes ; branchia} six or more pairs, elaborately ramose. 



Doris arborescens, Muller, Zool. Dan. Prodr. 229. — Fabr. Fauna Grocnl. 346 (1780). — 



Gmelin, i. 3107, No. 25. 

 Doris crrina? Gmelin, i. .310.5, No. 12. 

 Tritonia arborescens, Cuvier, Ann. du Miis. vi. 434, pi. 61, fitjs. 8-10. — Lamarck, An. 



sans Vert. 2d cd. vii. 454. — Fleming, Brit. An. 284. — Joiinst. Ann. Nat. Hist. 



i. 115. — Gould, Invert. 5. 



