LEVINSENELLA 393 



The figured branch (Fig. 26 B) has four series of zooecia, but flattened, strap-like 

 branches of varying width are more common. The broadest seen came from St. 1952 

 and had ten series of zooecia on each face. Both layers are formed of autozooecia. The 

 absence of a layer of kenozooecia, and the structure of the ovicells may ultimately 

 separate this species from Farciminellum. 



Kluge (1914) introduced the name Farciminaria simplex independently. As pointed 

 out by Livingstone, Kluge 's species agrees with the present species in its zoaria, zooecia 

 and locality. Unfortunately, its ovicells are unknown but it seems probable that F. sim- 

 plex Kluge is a synonym of Farciminellum antarcticum. 



2. Farciminellum hexagonum (Busk). 



Farciminaria hexagona Busk, 1884, p. 51, pi. xiv, fig. 10, pi. xxxi, figs. 3-36. 



Farciminellum hexagonum Harmer, 1926, p. 405, pi. xviii, figs. 8-10, text-fig. 20 B (synonymy). 

 Station distribution. Not represented in the Discovery collections. 



Geographical distribution. Marion Island (Busk); Andaman Islands (Thornely); Malay 

 Archipelago, 1224-3 112 m - (Harmer). 



3. Farciminellum lineare (Kluge). 



Flustra linearis Kluge, 1914, p. 657, text-fig. 37. 



Farciminellum lineare Harmer, 1926, p. 405. 

 Station distribution. Not represented in the Discovery collections. 

 Geographical distribution. Southern Ocean, 2910 m. (Kluge). 

 I have seen no specimen of this species. 



Levinsenella Harmer, 1926 



1. Levinsenella magna (Busk). 



Farciminaria magna Busk, 1884, p. 49, pi. v, fig. 1 ; Kluge, 1914, p. 650, pi. xxviii, fig. 8. 

 Levinsenella magna Harmer, 1926, p. 402 (synonymy); Hasenbank, 1932, p. 343. 

 Station distribution. Not represented in the Discovery collections. 



Geographical distribution. Off East Africa, 1668 m. (Hasenbank); off Montevideo, 3477 and 

 4850 m. (Busk); Southern Ocean, 3065 m. and 3397 m. (Busk; Kluge). 



I have compared Kluge's description with the type specimens and find that they 

 correspond very closely. Busk's figures were drawn from the specimen from St. 325. 

 The calcareous ribs described by Kluge are a conspicuous feature of the older zooecia. 

 In the oldest zooecia at the base of the colony the whole aperture including the orifice 

 is filled with coarsely granular longitudinal calcareous ridges. The rootlets from this 

 part of the colony are also calcified. 



As evidence that var. armata Busk is indistinguishable from the typical form Harmer 

 mentioned the presence of single avicularia in two mounted specimens. They are quite 

 numerous in parts of the unmounted colony (87. 12.9.230) from which the two slides 

 examined by Harmer were made. 



