but otherwise it is visible with the naked eye 1 ). At the top of the branches the length of all 
the tentacles is 1.5 mm. ; on the middle of the branches this length is somewhat less, but at 
the base of the branch the length is again 1.5 mm.. — There is nothing to be perceived of 
the degeneration of polyps which Brook describes and figures at the base of the branches; 
the little difference in length, which occurs, may easily be explained by the influence of the 
preservation. Also on the unbranched part of the base of the colony the tentacles are still 
very long. — There is well-developed oral cone (fig. 3); the mouth is usually inconspicuous 
but in most cases it is rounded and small. The back part of the axis shows a longitudinal 
groove in the coenenchyma. This specimen can, with regard to the mode of branching, dimen¬ 
sions and the form of the hook, be compared with Schizopathes ciffinis Brook, but as to the 
spines it is more like Schizopathes crassa Brook. As the polyps also show little deviations, e. g. 
the perceptible interpolypar distance, when compared with both Brook’s species, it is perhaps 
not undesirable to explain all the differences, which occur between Brook’s species and the 
Siboga-specimen, as variations and to join all specimen in Schizopathes ajjfinis Br., so that Schiz. 
crassa Br. disappears. The fact that only one specimen of this last species is found, makes it 
easier to accept this mode of dealing with it. 
The specific diagnosis must be emendated as follows: 
Colony. The branched part is flattened and triangular or sub-triangular; 
branches alternating laterally, decreasing in length towards the top of 
the colony. The base is hooked with flat sides and twisted at right angles 
to the plane of the branches. 
Spines. Short, triangular, smooth, arranged in 4—5 longitudinal rows 
or leaving one aspect of the axis smooth; distance irregular, so that some¬ 
times there are verticils, alternating with a wholly irregular distribution. 
Polyps. Crowded, with little or no interpolypar distance; all on one 
aspect of the axis; sometimes degenerating on the older parts of the 
colony. Mouth rounded and small, on the top of a cylindrical oral cone. — 
Length of the tentacles 1.5 mm. 
Former habitat. 
Brook. 35°39 / S. 50°47 / W. 1900 fathoms, blue mud. 
Brook. 4°2i / S. 129 0 p E. 1425 „ „ „ 
Brook. 2°33 / S. 144 0 4' E. 1070 „ „ „ 
Hickson. 48° 7' N. 8°i3 / W. 412 „ 
Roule. 45°38 / N. 5°53 / W. 1220 Meter. 
F. Cooper. 45 0 1 p N. 8o° 56' E. 880 fathoms. 
2 nd Subgenus Eubathypathes (Br.) n. n. 
1. Eubathypathes patula (Br.) emend. 
Bathypathes patula Br. BROOK, Chall. Report. Antipatharia 1889, pg. 151, PI. V, figs. 1—4; 
F. COOPER. Antipatharia (Percy SI. Tr. Exp.), p. 310, PI. 41, figs. 5—9. 
1) Unfortunately a part of a branch, which does not show this interpolypar distance, so clearly, was chosen for the fig. 3. 
