ABYSMAL FAUNA. 251 
rank as deep-sea forms, They were (xx.) Schizopathes conferta, Brook, 
and (xxi.) Cladopathes plumosa, Brook. Both belong to thesgroup 
Schizopathine. 
(jii.) Mapreporaria. The deep-sea Madreporarians are, as a 
rule, solitary forms, and they present no marked features connected 
with their abysmal habitat. The following species were taken 
in our area:—(xxii.) Flabellum apertum, Moseley, of the family 
Tcrswotups, taken at station 145 in comparatively shallow water, 
and again off Portugal in 900 fathoms ; (xxili.) Solenosmilia variabilis, 
Duncan, of the family Ocvnmwins, taken at station 145, and off Tristan 
da Cunha at 1000 fathoms, and again off Ascension Island; (xxiv ) 
Bathyactis symmetrica, Moseley, one of the Frwemox, a form uni- 
versally distributed in deep-water ; it has, moreover, a “wider range 
in depth than any other animal, occurring in 30 fathoms off Bermuda, 
and in the East Pacific Ocean at a depth of three miles.” It was 
taken at stations 147 and 157 in our area, and at numerous localities 
outside ; (xxv.) Leptopenus discus, Moseley, of the family Lursammio., 
taken at stations 147 and 157, and again in the South Atlantic at 
station 323, is an extraordinary fragile form. 
POLYCHATA. 
Some of the deep-sea Polycheta are phosphorescent, and many 
have developed large eyes or lost them altogether. There seems with 
them the same difficulty of extracting lime from the water that 
occurs in animals of other groups. Many of the Tubicolous forms 
fail to secrete a calcareous tube, and replace it by a quill-like sub- 
stance strengthened with sponge-spicules and Foraminifera. These 
tubes are, in some species, armed with spiny projections. 
Of the 220 new species of Polychaeta worms brought back by the 
Challenger the following were found in the Antarctic region :—(i.) 
Letmonice producta, Grube., Aparoorrin#. This is a very cosmopolitan 
form, and is known from Iceland and Japan, as well as from many 
of the stations the Challenger explored, where it often was found in 
considerable numbers. M‘Intosh recognises four new varieties of 
this species. Although, as a rule, a shallow-water genus, this species 
was found down to a depth of 2900 fathoms. Polynoé and Lagisca 
represent the Porrwors, (ii.) Polynoé (Admetella) longipedata, 
M‘Int., taken at station 146 to the east of Prince Edward Island, 
is remarkable for the size of its feet and bristles. Only two speci- 
mens came up, one of which was a female with large and numerous 
