92 
THE VOYAGE OF H.M.S. CHALLENGER. 
small. Avicularia vicarious ; mandible spear-shaped, with a very wide base and large 
inferior foramen ; apex acuminate, incurved, 0"‘013 x *008 to 0"'0095 x '008. 
Habitat. — Station 149d, Royal Sound, Kerguelen, 28 fathoms. Off Marion Island, 
50 to 75 fathoms. Station 304, lat. 46° 53' S., long. 75° 12' W., 45 fathoms, green sand. 
Station 315, lat. 51° 40' S., long. 57° 50' W., 12 fathoms, sand and gravel. Station 176, 
lat. 18° 30' S., long. 173° 52' E., 1450 fathoms, Globigerina ooze. Port William, Falkland 
Islands; 5 to 10 fathoms. 
[South Patagonia, Falkland Isles, Strait of Magellan, Darwin; Mount Gambier (fossil), 
Waters.] 
Salicornaria malvinensis presents considerable diversity of habit in different localities, 
so much so, that at first I had designated one of its varieties, characterised by the short- 
ness and thickness of the internodes and the comparatively large size of the orifice, 
Salicornaria megastoma ; but further examination has shown no essential differential 
characters between this and the forms with elongated and slenderer internodes. In the 
variety from Station 315 (fig. 7) a further exception to the more usual character is seen 
in the granular surface of the interareolar septa, when the epitheca has been removed. 
(8) Salicornaria tenuirostris, Busk. 
Salicornaria tenuirostris, Bk., Brit. Mus. Cat., vol. i. p. 17, pi. lxiii. fig. 3. 
Cellaria tenuirostris, Smitt, Florid. Bryoz., vol. ii. p. 4 pi. i. figs. 57-59. 
Character. — Zoarium slender, small, dichotomous ; joints nodular. Areas hexagonal, 
distant ; interior ridges united below ; surface subgranular. Orifice nearly central, 
crescentic or semicircular. Operculum semicircular, lower 
border nearly straight, 0"'005 x ‘003. Avicularia vicarious ; 
mandible spear-shaped, 0" , 009 x ’005, attenuated upwards, 
with a central columella and acuminate point. 
Habitat. — Station 314, lat. 51° 35' S., long. 65° 49' W., 70 
fathoms, sand. 
[Bass Strait, Voy. of Rattles. ; Gulf of Florida, 58 to 60 
fathoms, Smitt ; Queenscliff, Victoria, Muller ; Port Philip, 
Wilson.] 
fig . 12 —Salicornaria tenuirostris. The mandible in Salicornaria tenuirostris is sometimes 
smaller and shorter, when it is scarcely distinguishable from 
that of Salicornaria bicornis, with which the species appears to be closely related. But 
the operculum differs considerably, and by this alone the two may be distinguished. The 
lateral trabeculae, also, in Salicornaria tenuirostris are much longer than in Salicornaria 
bicornis. 
