24 AUSTKALASIAN ANTARCTIC EXPEDITION. 



The tentacles are white; the dorsal cirri are alternately plain white, and white 

 ringed with purplish brown. In some specimens these white cirri are more closely 

 coiled than the others, and lie close to the body forming a fringe, as it were, along its 

 margin. The purple-ringed cirri, however, are more loosely coiled, and they rise above 

 the level of the former, over the back of the worm. The two series of cirri are thus 

 very readily distinguished. All the cirri, like the tentacles, are moniliform. 



Ehlers (1897) states that when alive, the colour of the worms from South Georgia 

 were " a beautiful orange, with white belly ;" those from Magellan Strait were rosy- 

 red, with dark brownish-red cirri ; or pale flesh-coloured, with cirri of the same tint; 

 or dark brown. The former plan of colouration seems to agree with those from 

 Commonwealth Bay. He also notes (1911) that in February and March the species 

 develop swimming bristles, so that presumably they become sexually mature at this 

 period. 



Localities. 



Commonwealth Bay, Station D, 45-50 fathoms, 

 Station 1, 350-400 fathoms, 

 Station 2, 318 fathoms, 

 Station 12, 110 fathoms, 



*Distribution. Kerguelen (Mclntosh), South Georgia, Magellan Strait, Juan 

 Fernandez, Kaiser Wilhelm II Land, South Victoria Land (Ehlers), 

 Marguerite Bay, Terre Alexandre (Gravier). 



Sub-family EXOGONE.E. 

 Genus EXOGONE Oersted. 



EXOGONE ANOMALOCH^TA Sp. HOV. 



(Plate 5, figs. 11-13.) 



Several small worms, measuring about 6 mm. in length, with about 36 segments, 

 agree pretty closely with E. heterosetosa Mclntosh, so that it is unnecessary to give a 

 detailed account of them. Nevertheless, there are two differences from that species 

 which render it necessary to establish a new one. 



The tentacles spring close to the anterior margin of the prostomium, and in this 

 respect differs from the above species. (See Ehlers, 1897, pi. Ill, fig. 61.) They are 

 unequal in size ; the median is spindle-shaped, shorter than the length of the postomium; 

 the laterals are ovate and shorter than the median. 



The peristomium bears a short ovate cirrus, and just above it a nuchal organ, 

 such as Gravier figures for E. turqueti (1906, pi. 1, fig. 3). The huge palps are longer 

 than the prostomium. The anal cirri are spindle-shaped, and equal in length the anal 

 segment. 



* If Fauvel is correct in identifying the species with Syllis tceniosformis Haswell, and with T. richardi Gravier, the 

 further localities must be added Australia, North and South Atlantic, Red Sea, Persian Gulf. 



