48 
THE VOYAGE OF H.M.S. CHALLENGER. 
are known to be present. Beyond these variations the ramification and general habit 
of the colony afford almost the only grounds for the systematic differentiation of the 
species. 1 
Grammaria stentor, n. sp. (PI. XXIII. figs. 1, la). 
Trophosome. — Colony attaining a height of between three and four inches, set with 
pinnately disposed ramuli which are alternate, subopposite or opposite, thinner than the 
stem, and often carrying secondary ramuli similar in disposition to the primary ones. 
Hydrothecse rather long and wide and abruptly though slightly dilated at the orifice, and 
disposed in six longitudinal series. 
Gonosome not known. 
Locality . — Station 149d, Royal Sound, Kerguelen; depth, 28 to 60 fathoms. 
This is a strong-growing species with the main stem thick towards the base and 
becoming gradually thinner towards the distal end. From either side the stem sends off 
pinnately disposed ramuli, which are sometimes opposite, but more frequently alternate 
or subopposite. The pinnae, except at their origin, where, as in all the known species 
they are greatly constricted, are of uniform thickness. They are thinner than the stem 
from which they spring, and are sometimes simple, sometimes pinnately branched. 
The graceful curve of the rather wide tubular hydrothecae, and the slight trumpet- 
like dilatation of the orifice, confer on a magnified view of this fine species an aspect of 
great elegance. 
Grammaria magellanica, n. sp. (PI. XXIII. figs. 2, 2a, 2b). 
Trophosome . — Hydrocaulus set with pinnately disposed alternate ramuli which are 
given off at rather wide intervals, and very much contracted at their origin. Hydrothecae 
cylindrical, with even, circular, non-everted orifice, and disposed in six longitudinal series. 
Gonosome not known. 
Locality . — Station 314, near the Falkland Islands; lat. 51° 5' S., long. 65° 39' W.; 
depth, 70 fathoms. 
The specimens of this species are fragmentary, the hydrorhizal extremity has in no 
instance been preserved, and the size and general habit of the Hydroid cannot be 
1 Mr. Hincks regards Lamouroux’s genus Salacia (Exposition Methodique, p. 15) as identical with the Grammaria of 
Stimpson, whose name he accordingly suppresses in favour of the earlier one. If, however, Lamouroux had really a 
Grammaria before him, his figure of it is altogether so bad, and his description so inadequate, that it is impossible to 
feel satisfied in the identification with Grammaria of the zoophyte to which the French zoologist assigned the name 
Salacia ; so that even though Mr. Hincks be right in his reference of the Grammaria of Stimpson to the Salacia of 
Lamouroux, the uncertainty which must always hang over the nature of Lamouroux’s animal will fully justify us in 
accepting Stimpson’s name for a genus which this zoologist has described so fully as to leave no doubt as to the form 
intended by him. 
