272 J\Ir. J. W. PryJc on Annelida Polychcela 



maildy Bay. It is also found off tlie shores of Norway [Sars] 

 and off the Mediterranean shores of France. 



The hirgest specimen has about 60 segments and is fusi- 

 form in shape. The body dilates behind tiie head, reaches its 

 maximum about the anterior tliird, and then tapers to the 

 tail. The tail terminates in two moderately long slender cirri, 

 while the dorsum has a lustrous brown colour, which is trans- 

 versely banded at intervals with belts of fine iridescent blue. 

 In the largest specimen nine such bands were seen, besides 

 several minor streaks which become fainter and fainter poste- 

 riorly. When the animal was placed in spirit the colours 

 instantly disappeared, while the animal itself broke up into 

 fragments. The same thing, according to the Monograph, 

 takes place on the immersion of the animal in fresh water or 

 in impure sea-water. 



Many specimens show an extruded proboscis, which is 

 proportionately large, but is devoid of papillae or jaws. In 

 the extruded condition the proboscis is cylindrical, but in 

 some there was a swollen basal region. The buccal opening 

 is capable of great dilatation. No specimen showed signs of 

 matiuity. 



Ophiodromus flexuosiis does not appear in the ' Cliallenger ' 

 Keports, but an allied form, Salvatoria kerguelensis, is referred 

 to. No mention of it is made by Prof. Izuka, of Japan. 



Genus Castalia, Savigny, 1820. 

 Castalia fusca, Johnston, 1836. 

 This annelid was obtained in dredge 7 at a depth of 

 15 fathoms. In all there are five complete specimens and 

 six fragments. The specimens are very small, the largest 

 only measuring | inch. They usually are found in much 

 shallower water, for they occur between tide-marks at various 

 points around the British shores. In Shetland they are 

 common in the roots of tangles in the Laminarian region. 

 Keferstein obtained this species at St. Vaast, Normandy, 

 (Jlai)aredeat Naples, Cams in the Mediterranean, and Marion 

 at Marseilles; Imt there is no word of it in the Reports of the 

 ' (Challenger ' Expedition nor in the ' Eirantiale rulyclueta 



of Ja))an.' 



The specimens are reddish brown and have a well-marked 

 dark line down the dorsum. This line is the dorsal blood- 

 vessel. The segments number about 50, slightly narrowed 

 in front and then they narrow more and more towards the 

 tail-region, which terminates in two slender cirri. One 

 specimen had a short, ey Imdi ieal, and somewhat massive 



