DENDRONOTUS. 235 



Tritonia lieynoldm, Couthocy, Bost. Journ. Nat. Hist. ii. 74, pi. 2, figs. 1-4 (1838).— 



De Kay, N. Y. Moll. 8, pi. .5, fig. 94 (184-3). 

 Tritonia laclea, Tiiomp. Aim. Nut. Hist. v. 88, pi. 2, fig. 3. 

 Tritonia pulchella, Aldeu and Hancock, Ann. Nat. Hist. ix. 33. 

 Dcnclronolus arbonscens, Alui:r and Hancock, Nudib. Moll, in Ray Soc. Fam. 3, pi. 3 



(1830). — Stimpson, Mar. Inv. Grand Manan, 26 (1853). — LoviN, Index Moll. 



Scand. 6 (1846) {ling, c/en^/c. pi. 3). — Chknu, Man. de Conch, i. 407, fig. 3059 (1860). 



— Ad.vms, Gen. ii. 65, pi. 64, fig. 7. 

 Dendronotus lleijnoldsii, Stimpson, Check Lists, 4 (1860). 



Body elongated, tapering, rounded aljove, as liigli as broad ; color 

 very variable, reddisb marbled with brown and opaque white, or 

 pale rose color, or white or dark mottled brown ; surface somewhat 

 warty ; head blunt with a coronet of about six antler-like append- 

 ages directed forwards. Tentacular sheaths long, terminating in 

 five ragged fringes, with one at the posterior base also. Tentacles 

 cliib-sha[)ed, pale yellow, with five or six transverse plates. Bran- 

 chiae ill six or more pairs, diminishing in size backwards, delicately 

 transparent, with a few opaque spots, contractile, beautifully and 

 intricately arborescent, the number of tufts and branchlets increas- 

 ing with age. Foot thin and delicate, showing the viscera beneath, 

 adapted for clasping. Heart forming a large swelling between the 

 four anterior branchia;, pulsating about seventy-five per minute. 

 Eyes exceeding small, on the lateral base of the tentacular sheath. 

 Length, two and three inches or more. 



Found on Tubiilaria and elsewhere about the Bath-house, Crai- 

 gie's Bridge, Boston ( Coxf/iox/y, Gould) ; on rocks and Lamiiiaria 

 in the Harbor (^Stlmpsuii) ; Lynn (Hufder). Fine large specimens, 

 CDinmonly colorless, in all ])arts of the Laminarian Zone; on rocky 

 bottoms, (irand ]\[anan ( Stimpson.) ; in tide pools, Kennebunk (RetK 

 J. Siraii) ; (piite common in the northern parts of the British Lsles 

 (Alder and Iluiicock) ; Scandinavia (^Loven) ; Greenland (O. Fa- 

 briciiis). 



This is a most curious and l)eautiful animal, both on account of 

 its graceful and at the same time fantastic form, and its Ijrilliancy 

 and variety of coloration, which, with varied number and comi)lica- 

 tion of its a})|)endages, mostly from age, has given rise to a number 

 of names. Extended oijservation, however, has shown that all are 

 forms of the same animal. Its motions are slow, and its great i)lia- 

 bility enaljles it to grasp and make its way over minute stems of 

 plants and zoJiphytcs with great case. It also floats easily at the 

 surface in an inverted position. The spawn is issued in a small 

 bobbin-like thread looped into flounces and hung ui)on zoophytes, or, 

 when deposited on a plane surface, laid in a regular spiral. 



