NORTH SIDE OF THE BAY OF BISCAY, AUGUST, 1906. 33 



Antennularia antennina (Linn.). 



Small colonies were fairly common at Station I., 75 fathoms, but 

 scarce at Station II. 



Distribution. Eecent foreign records: — Norway, 100-200 fathoms 

 (Bonnevie); Bay of Biscay, Gulf of Gascogne, 10-35 fathoms (Pictet 

 et Bedot) ; Portugal (Nobre) ; iSTorth Atlantic, off the American coast, 

 lat. 42° N., long. 65° W., 65 fathoms ; lat. 35° K, long. 75' W., 71 

 fathoms (Nutting). 



Antennularia ramosa (Lamarck). 



A few fragments were taken at Station II., 75 fathoms. 



Distribution. Piecent foreign records: — Bay of Biscay^ Gulf of 

 Gascogne, 35-75 fathoms (Pictet et Bedot); Portugal (Nobre); Azores, 

 75 fathoms (Pictet et Bedot). 



Antennopsis, Alhnan, 1877. 

 Generic character (Nutting, 1900). Trophosome — stem jointed; 

 coenosarc not canaliculated ; hydrocladia scattered irregularly over the 

 stem, sometimes approaching a verticillate arrangement. Gonosome — 

 gonangia borne in the axils of the hydrocladia, without protective 

 appendages. 



Antennopsis norvegica (G. 0. Sars). 



Heteropyxis norvegica, G. 0. Sars, 1873, p. 104, Tab. III. figs. 15-22. 



Antennularia norvegica, Bonnevie, 1899, p. 97. 



Antennularia norvegica, Broch, 1903; Broch, 1905, p. 24; Billard, 

 1907, p. 217. 



At Station XIIL, 412 fathoms, a few colonies about 15-35 mm. in 

 height were found upon Lophohelia. 



In young colonies the arrangement of the hydrocladia on the stem 

 is pinnate, as in the genus Plumularia. The same arrangement is 

 found at the bottom of the larger plumes, but as the stem grows in 

 length the hydrocladia no longer remain in the same plane. They 

 project out in pairs, either alternate or opposite, at an angle of about 

 forty-five degrees. At the distal end of the plume the hydrocladia 

 become closer together and more irregular in position, and scattered 

 in all directions round the stem. This irregular arrans-ement of 

 the hydrocladia led Bonnevie to place the species in the genus 

 Antennularia. 



Nutting in his revision of the Plumularidse has restricted the genus 

 Antennularia to species with a canaliculated stem, and retains the 

 genus Antennopsis for species with a simple or fascicled stem. 



The specimens from the Bay of Biscay have a simple, monosiphonic 

 stem. Bonnevie, however, states that the main is compound, which 

 I interpret to mean a fascicled stem. 



XEW SERIES. — VOL. VIII. NO. 1. C 



