OXYDROMUS PROPINQUUS. 443 
1900. Callizona setosu, Apstein. Plankton Exped., p. 18, Taf. iv, figs. 89—43. 
1911. “4 » southern. Irish Sc. Invest., No. 3, p. 5. 
1916. m »  Fauvel. Annél. Pelag. Monaco, p. 69. 
1922. » McIntosh. Ann. Nat. Hist., ser. 9, vol. ix, p. 138. 
Habitat—Captured in the tow-net on eel-trawl near 480 fathoms. 
It also has been found in the Mediterranean ; Atlantic, from Africa to Brazil. 
CALLIZONA NASUTA, (reef, 1876. 
Specific Characters—Prostomium large and elevated. Frontal tentacles large, brown, 
and the median placed between the eyes—the region in front and the peristomium being 
ciliated. Body typical, with five tentacular cirri ; small papillee on the edge of the proboscis ; 
last segment yellowish-green ; a single anal cirrus. Foot with pointed leaf-like cirri ; bristles 
slender, with long, delicate tips, and on the anterior feet one or two thicker bristles. Sperm- 
sacs on segments 2—4. 
SYNONYMS. 
1861. Rhynchonerella gracilis, A. Costa. Ann. Mus. Zool. Nap., p. 168, Tav. iv, figs. 13—15. 
1876. Callizona nasuta, Greef. Nova Acta K. Leop.-Carol. deut. Akad., p. 72. 
1885. Rhynchonerella gracilis, Carus. Fauna Medit., i, p. 246. 
1891. Callizona nasutu, Apstein. Jahrb. d. Hbe. wiss. Anst., p. 11. 
1893. 5 » idem. Arch. f. Naturges., p. 148. 
1900. * »  ldem. Plankton Hxped., p. 19, Taf. ii, figs. 31 and 32. 
1911. * » Southern. Irish Sc. Invest., i, p. 10. 
1922" ze » McIntosh. Ann. Nat. Hist., ser. 9, vol. ix, p. 13. 
Habitat.—Off the West Coast of Ireland in the midwater trawl between 600 and 700 
fathoms (Southern). 
Abroad it has been found off the Canary Islands, and off Naples and Messina in the 
Mediterranean. Southern is of opinion that Apstein’s Callizona Henseni should be included 
under this form. 
Famity HESIONIDZ. 
Genus OxypROMUS, Grube, 1855. 
Cephalic lobe trapezoidal, narrower in front ; two pairs of eyes ; median and two lateral 
tentacles; two palpi. Body vermiform, segments comparatively few; two anal cirri; 
buccal segment short ; tentacular cirri four on each side; long, cylindrical, exsertile pro- 
boscis devoid of marginal papillee ; feet uniramous, conical, with a tuft of slender compound 
bristles. 
OxypDROMUS PROPINQUUS, Marion and Bobretzky, 1875. Plate CX XXIV, figs. 5 and 5a— 
bristles. 
Specific Characters—Head cordate, and a dimple posteriorly, with groups of vibratile 
cilia, longer on the lateral and occipital regions ; four eyes in a trapezoid about the middle, 
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