522 
CCELENTEBATA. 
OOTACTINIA. 
Piilella grandis (Ehrbg.) = Pennatula borealis^ Sars ; Koren & Daniels- 
sen (4), p. 422. 
Pennatula aculeata, and var. rosea, and P. distorta, s^. n., iid. 1. c. p. 423 
(Norway). 
Virgularia affinis (= glacialis and steenstrupi, Roll.), iid. 1. c. p. 424. 
Batea g. n., iid. 1. c. Approaching Stylatula in habit. Stem with 
a terminal vesicle ; rhachis with a rather long lateral zooid-stripe 
and radial channels branching from the dorsal and ventral canal, 
producing a feeble swelling on the dorsal and ventral surface; finlets 
rudimentary, fortified by a calcareous plate, composed of shorter and 
longer spicules, which project far over the rudimentary finlet; polyps 
without colls, long, cylindrical, hardly contractile, coalesced at the base ; 
sexual organs in the hypogastric cavity of the fully-developed polyps ; 
zooids lateral ; axis cylindrical, with numerous radiating fibres. B. 
ahyssicola, sp. n., iid. 1. c. p. 425, and var. n. smaragdina (Norway), also 
B. {Stylatula, Roll.) elegans (Dan.), pp. 425 & 426. 
Lygomorpha, g. n., iid. 1. c. Small robust sea-pens ; end of stem club- 
shaped ; ventral surface roundish, broad and naked ; cells thick, sessile, 
placed alternately on the back and sides ; orifice semilunar, with two 
strong teeth; polypes retractile; zooids few, scattered on the dorsal 
surface ; calcareous spicules in the cells, tentacles, and sarcosome ; axis 
cylindrical. L. sarsi, sp. n., iid. 1. c. p. 426 (Norway). 
Cladiscus ||, g. n., iid. 1. c. Small rigid sea-pens; cells separately 
placed on the rhachis in alternating rows, provided with eight longi- 
tudinal ribs, and eight papillae round the orifice ; polyps robust, retrac- 
tile ; zooids ventral ; no calcareous spicules. C. gracilis, sp. n., iid. 1. c. 
pp. 426 & 427 (Norway). 
Lindahl’s investigation (8) of the structure of the two “cluster- 
polypes” discovered during the Swedish expedition to Greenland and New- 
foundland in 1871, has induced the establishment of a third sub-family 
oiPennatulece : — Umhellulece. Coral bilateral, without finlets : polyps with- 
out calycles, of two different kinds, the lateral arranged in one longi- 
tudinal series on each side of the rhachis, the smaller (but perfectly 
developed) dorsal polyps arranged in somewhat irregular transverse 
rows ; zooids in separate areas, crowded, lateral and ventral ; rhachis 
about one-fortieth of the stem ; calcareous axis quadrangular, with a 
deep longitudinal groove on each side. Genera : Crinillum, v. d. H. ; 
“ transverse section of the axis 4-lobed, with a rounded notch on each 
side; nucleus circular “(C7. siedenhurgi, Banka Sea, 2700 fath., only 
known from the axial skeleton) ; and Umhellula, Cuv., “transverse 
section of the axis 4-lobed, with the ventral notch rounded, and those 
of the three other sides rectilinear, forming angles of about 90® ; nucleus 
doubly crescentic ; no calcareous spicules.” U. miniacea, Ldl. (Baffin’s 
Bay, 70® 43' lat. N., 410 fath.), and U. pallida, Ldl. (entrance of 
Omenaks Fjord, 71® 27' lat. N., 122 fath.); none of them can be identified 
with U. encrinus. It., found in the year 1753 in 79® lat. N., 80 miles off 
