8 Ech. 
ECHINODEliMATA. 
Ophioinusiam sei'ratum, sp. n., Lyman (11 a), p. 109, pi. i. figs. 23-26, 
Atlantic, 450 fath. ; armigerum, sp. n., id, ibid., pi. i. figs. 21 & 22, 
Atlantic and Pacific, 1650-2200 fath.; corticoram^ sp. n., id. ibid, p. 110, 
pi. i. figs. 19 & 20, Eastern Seas, 1850 fath. ; cancellatum^ sp. n., id. ibid. 
p. Ill, pi. i. figs. 17 & 18, Atlantic (?) and Eastern Seas, 300-470 fath. ; 
archaster . Th., id. ibid. p. 112, pi. ii. figs. 28, 29, & 32, Atlantic, 1900 
fath. ; laqueatum, sp. n., id. ibid. p. 113, pi. i. figs. 14-16, Eastern Seas, 
129 fath.; luetkeni^ sp. n., id. ibid. p. 114, pi. v. figs. 138-140, ibid. 129 
fath. ; validum^ Ljgm., id. ibid. pi. i. figs. 7-9, West Indies, 390-450 fath. ; 
simplex, sp. n., id. ibid. p. 115, pi. i. figs. 10 & 11, Amboyna, 100 fath. ; 
lunare, sp. n., id. ibid. p. 116, pi. i. figs. 4-6, 150 fath., scalare, ibid, 
p. 117, pi. i. figs. 1-3, 600 fath., and granosum, sp. n., id. ibid. p. 118, 
pi. i. figs. 12 & 13, 875 fath.. Eastern Seas; pulchellum, W. Th., id. 
ibid. pi. V. figs. 144 & 145 (“aberrant species; by its curious flaring 
under arm-plates, and its short rapidly-tapering arms, it gets a fanciful 
resemblance to some starfishes”), Atlantic, 150-1675 fath; flabellum, 
sp. n., id. ibid. p. 120, pi. v. figs. 141-143, off Port Jackson, 30-35 
fath. ; planum, sp. n., id. (11 b) p. 218, pi. iii. figs. 46-48, Gulf of Mexico, 
955 fath. A synoptical table of the species of Ophiomusium (excepting 
0. planum) is given (11 a), p. 108. 
Ophiopyrgus, g. n., Lyman (allied to Ophioglypha and Ophiomusium). 
“ Disk high, dome-shaped, covered with thick swollen plates, surmounted 
by a central primary cone-like plate; arms slender, smooth, side-arm- 
plates very large, upper and under arm-plates small ; basal tentacle-pores 
very large, those beyond small, near sides of arm ; an arm-comb ; arm- 
spines minute, on outer edge of side arm-plate ; two long genital open- 
ings.” “ The most singular looking genus yet found among Ophiuridce.*' 
0. wyville-thomsoni, sp. n. (11 a), p. 121, pi. v. figs. 135-137, Tougatabu, 
240 ,(18 ?) fath. 
Ophiolipus, g. n., Lyman (allied to Ophiomusium). “ Skin thick, smooth, 
obscuring more or less the underlying plates {Ophiomyxa-idi^liioii) ; mouth- 
papillae ; teeth ; no tooth-papillae ; tentacle-pores only at the basal under 
arm-plates ; upper arm-plates rudimentary, scarcely calcified. 0. agas- 
sizi, sp. n., id. (11 b), p. 220, pi. iii. figs. 52-54, Gulf of Mexico, 118 fath. 
Ophiernus, g. n., Lyman (allied to Ophioglypha). “ Central portion of 
disk covered by a thick skin ; a broad marginal band of scaling, inter- 
rupted only by the naked radial shields, covering also the lower inter- 
brachial space, the whole more or less hidden by the skin ; teeth ; mouth- 
papillae small, numerous, close set; first under-arm -plate rather large, 
bearing some of the scales of the second pair of mouth- tentacles ; upper 
arm-plates covering the whole width of arms ; small smooth arm-spines, 
arranged along outer edge of side arm-plate ; two large long genital 
openings.” 0. vallincola, sp. n., id. (11a), p. 122, pi. vi. figs. 170-172, 
Atlantic and South Seas, 1000-1975 fath. 
Ophioconis miliaria, sp. n., Lyman (11 b), p. 221, pi. iii. figs. 49-51, off 
Havana, 243-450 fath. 
Ophiochoeta (?) mixta (differing from the typical species through the 
long and more movable arm-spines, and the shape of the under plates), 
sp. n., Lyman (11 b), p. 222, pi. ii. figs. 40-42, oft* Havana, 160-292 fath. 
