DEXDEONOTUS. - 235 



Tn'fonia Reynolddi, Couthouy, Bost. Joiirn. Nat. Hist. ii. 74, pi. 2, figs. 1-4 (1838). — 



De Kay, N. Y. Moll. 8, pi. .5, fig. 94 (184.3). 

 Tiitonia lactea, Thomp. Ann. Nat. Hist. v. 88, pi. 2, fig. 3. 

 Trilonia inilchella, Alder and Hancock, Ann. Nat. Hist. ix. 33. 

 Dcndronotus arborescens, Alueu and Hancock, Nudib. Moll, in Ray See. Fam. 3, pi. 3 



(1830). — Sti.mpson, Mar. Inv. Grand Manan, 26 (1853). — Loven, Index Moll. 



Scand. 6 (1846) {Unci, denlic. pi. 3). — Ciienu, Man. de Conch, i. 407, fig. 3U59 (1860). 



— AuAMS, Gen. ii. 65, pi. 64, fig. 7. 

 Dendronotus Rei/noldsii, Stimpson, Check Lists, 4 (1860). 



Body elongated, tapering, ronnded above, as high as broad ; color 

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

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

 warty ; head blunt witli 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 

 club-shaped, pale yellow, with five or six transverse plates. Bran- 

 chise in 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 ( Couthouy^ Gould) ; on rocks and Laminaria 

 in the Harbor (^Stimpson) ; Lynn (^Holder). Fine large specimens, 

 commonly colorless, in all parts of the Laminarian Zone ; on rocky 

 bottoms. Grand Manan (^Stimpson') ; in tide pools, Kennebunk (Rev. 

 J. Swan} ; quite common in the northern parts of the British Isles 

 (Alder and Hancock); Scandinavia (Loven} ; Greenland (O. Fa- 

 bricius). 



This is a most curious and beautiful animal, both on account of 

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

 and variety of coloration, which, with varied number and complica- 

 tion of its appendages, mostly from age, has given rise to a number 

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

 forms of the same animal. Its motions are slow, and its great plia- 

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

 plants and zoophytes with great ease. 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 upon zoophytes, or, 

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



