ABYSMAL FAUNA. 255 
bathybial hosts as in shallow-water forms. A species of Nematode, 
Ascaris macruroidei, v. Linst., has, however, been described “ from 
the stomach of a large Macrurid” taken at station 147, from 1600 
fathoms. Another, but a free-living, specimen of the same Class, 
Prothedmins profundissima, von Linst., the type of a new genus and 
species, was taken at a depth of about 2000 fathoms. This specimen 
was immature, and is described as a larval form, the largest free- 
living larva known amongst the Nematoda. It is devoid of any 
boring apparatus, and is, therefore, possibly free-living throughout 
life. Wherever the specimen was in the least degree injured the 
cuticle had rolled up, probably owing to the difference of pressure 
between the depths and the surface. Its muscular system is peculiar, 
approximating more to the Gordian worm type than to that of the 
more typical Nematoda. 
Specimens of all animals, especially of fishes, from great depths 
should, as far as possible, be carefully searched, especially the body 
cavity and the entire alimentary tract, for Entozoa. It is highly 
probable that many new forms will in the future be described from 
this practically unexplored field. 
In his monograph on the genus Serolis, Mr. Beddard records a 
species, S. necera, which came up from a depth of 2040 fathoms, but 
not in our area, and which bore, entangled in its appendages, a 
number of small Nematodes, apparently free-swimming forms. 
Although not an abysmal form, it is worth mentioning in con- 
nection with parasites, that a new genus of Tape-worm, Tetrabothrium 
auriculatum, von Linst., was once found in the intestine of a Petrel, 
Thalasseca glacialoides, Smith, in the Antarctic Ocean, and once 
again in the “Cape Pigeon,” Daption. A search through the viscera 
of such birds will almost certainly be rewarded by the discovery of 
some new forms of Entozoa. 
BRACHIOPODA. 
The following species are recorded by Davidson from the waters 
around the Antarctic land or in the neighbouring seas :—(i.) Tere- 
bratula moseleyi, Dav., west of Kerguelen Island, at a depth of 210 
fathoms. (ii.) 7. wva, Brod., off Heard Island, 10-600 fathoms. 
(iii.) ZT. wyvillei, Dav., off the Falkland Islands, 1035-2900 fathoms. 
(iv.) Terebratulina caput-serpentis, Linn., west of Kerguelen, 0-1180 
fathoms. (v.) 7. murrayi, Dav., off Kerguelen, 600 fathoms. (vi.) 
Waldheimia venosa, Sol., Tierra del Fuego and Falkland Islands, 
5-50 fathoms. (vit.) W. kerguelenensis, Dav., off Marion and Ker- 
guelen Islands, 100-150 fathoms. (viii.) Terebratella dorzata, Gmel., 
