150 " ENDEAVOUR " SCIENTIFIC RESULTS. 



Remarks. — This differs from the diagnosis of the genus- 

 Notomastus as given by Eisigi in the presence of capillaries 

 on the first abdominal segment. It differs from Eunotomastus- 

 of M'lntosh^ in having only 12 thoracic segments and in the 

 presence of capillaries only in the anterior abdominal' 

 segments. 



I hesitate to form a new genus, as my literature is not suffi- 

 ciently modern for me to ascertain whether such a divergence 

 is already known. 



Loc. — South of St. Francis Island, South Australia, 35 

 fathoms (with Thalanessa oculata and Ophelia dannevigi). 



Family OPHELIID^. 



Genus Ophelia, Savigny. 



Ophelia dannevigi,^ sp. nov. 



(Plate xlviii., figs. 36-37.) 



A single specimen, 20 mm. in length with a breadth of 

 1.25 mm. across the ventral surface, and a height of 2 mln. 

 The body contains 32 chsetiggrous segments, and has the 

 usual spindle shape. 



The prostomium carries at its apex a finely pointed conical 

 tentacle with a pair of nuchal organs at its base, appearing 

 as little brown streaks. 



The mouth is at the level of the first chsetse. 



The anus is surrounded by a circlet of 16 subcylindrical 

 tentacle-like organs, eight on each side, arising from a 

 common basal membrane. In addition there is a couple of 

 ventral lancet-shaped stouter processes (PI. xlviii., fig. 37.) 



The ventral surface is traversed by a broad furrow, 

 marked with transverse muscular bands, and bounded by 

 a well-defined rounded ridge on each side. This " sole " is 

 continued on to the head where, however, the ridges are 

 absent. At first narrow, it attains its full width at about 

 the tenth segment, and retains this till near the hinder end, 

 where it again narrows, terminating at the base of the 

 ventral anal lobes. 



1. Eisig — Die Capitelliden, Naples Monograph, 1887, p. 807. 



2. M'Intosh— Chall. Rep., Zool., xii., 1885, p. 388. 



3. Named after the late Mr. H. C. Dannevig, Commonwealth Director- 

 of Fisheries. 



