SYNNOTUM AND FARCIMINELLUM 39 i 



Synnotum Pieper, 1881 

 1. Synnotum aegyptiacum (Audouin). 



Loricaria aegyptiaca Audouin, 1826, p. 243; Savigny, pi. xiii, figs. 4 x -4 5 . 



Synnotum aegyptiacum Harmer, 1926, p. 398, pi. xxvii, figs. 3, 4 (synonymy); Hastings, 1930, 



p. 702; 1932, p. 408; Marcus, 1937, p. 58, pi. xii, fig. 28 A, B; 1938a, p. 26, pi. v, fig. 12. 

 Synnotum aviculare Neviani, 1939, p. 20. 

 Station distribution. New Zealand: St. 934. 



Geographical distribution. Mediterranean (Pieper; Hincks; Waters; Calvet; Neviani); Red 

 Sea (Waters); South Africa (Waters); Indian Ocean (Thornely; Robertson); Malay Archipelago 

 (Harmer); Australia (MacGillivray; Waters; Hastings); New Zealand (Discovery); Japan (Ortmann); 

 California (Robertson); Gorgona (Hastings); Curacao; Tortugas (Osburn); Fernando Noronha 

 (Kirkpatrick) ; Brazil (Marcus). 



This species is represented by three small fragments only. They are, however, charac- 

 teristic and prove that the species is, as might be expected, present in New Zealand 

 waters. 



Farciminellum Harmer, 1926 

 1. Farciminellum antarcticum sp.n. Plate VIII; Figs. 26 B, 27 B. 

 Farciminaria simplex Livingstone, 1928, p. 24. 

 not Farciminaria simplex MacGillivray 1886a, p. 130, pi. i, fig. 1. 

 ? Farciminaria simplex Kluge, 1914, p. 650, pi. xxviii, fig. 7; Harmer, 1926, p. 405. 



Station distribution. Antarctic: Weddell Quadrant, Sts. 27, 42, 140, 144, 172, 175, 366, 1952, 

 WS 42, Victoria Quadrant, Sts. 1652, 1660. 



Geographical distribution. South Georgia; South Sandwich Islands; South Shetland Islands 

 (Discovery); Adelie Land (Livingstone); Wilhelm II Land? (Kluge); Oates Land (Terra Nova); 

 Ross Sea (Terra Nova; Discovery). 



Holotype. Australian Antarctic Expedition, St. 4, 65 48' S, 137 32' E, 230 fm. 30.2.24. 1. 



The Antarctic species, Farciminaria simplex Livingstone, differs in various ways from 

 F. simplex MacGillivray, as noted by Harmer and Livingstone. I propose for it the name 

 Farciminellum antarcticum. A specimen from the Australian Antarctic Expedition sent to 

 me by Mr Livingstone agrees exactly with the Discovery and Terra Nova specimens, 

 and I have made it the holotype. 



F. antarcticum differs from Farciminaria simplex MacGillivray in its tendency to form 

 flat pluriserial branches ; in the greater length and slighter calcification of its zooecia ; in 

 the absence of the crenulation of the borders of the aperture ; and in the presence of thin 

 projecting edges to the aperture of the fertile zooecia (Fig. 26 B). The greatest difference 

 is in the ovicells (cf. Fig. 26 A and B). In general appearance they are narrower and more 

 prominent than those of F. simplex, and rather straight-sided. The ectooecium, which 

 is continuous with the frontal membrane of the distal zooecium, is partly calcified, the 

 calcareous portion forming a pair of plates or valves wrapping round the entooecium 

 laterally and frontally. The valves meet in a median longitudinal suture which may form 

 a slight keel. With light pressure the ovicell splits along this line as can be seen in one 

 instance in Fig. 26 B. The entooecium may show a faint radial striation (Fig. 27 B). 



