34 HYDROIDS COLLECTED BY THE " HUXLEY " FROM 



The internodes of the main stem are very irregular in length ; some 

 are quite long, carrying about eight hydrocladia, others are very 

 short, with only two or three hydrocladia. 



The nematophores are bithalamic and rather small. On each inter- 

 node of the hydrocladia there are three, two situated in front of the 

 hydrotheca and one behind it. There are also two in the axil of 

 the hydrocladia, and several scattered over each internode of the 

 main stem. 



The gonangia are in the axil of the hydrocladia, usually one or two, 

 but occasionally three are present. They are curved downwards, and 

 contain a single ovum. 



Distribution. Norway, Kristianfjord, 50-60 fathoms; Hardanger- 

 fjord, 90-100 fathoms (Sars). North Atlantic, off the Norwegian coast, 

 61° 41' N., 3° 19' E., 219 fathoms, +6^ C; 62" 44' N., 1° 48' E., 411 

 fathoms, - l-Q" C. ; 64° 48' N., 6° 36' E., 155 fathoms, + 6-9° C. (Bonnevie). 

 North Sea, 57° 11' N., 1" 50' W., 55 fathoms, 58° 0' N., 3° 24' E., 50 

 fathoms; 57° 9' N., 1° 30' E., 50 fathoms, +615° C. (Broch, 1905); 

 62° 16' N., 6° 6' W., 60 fathoms (Broch, 1903). South-west of Toulon, 

 245 fathoms (Billard). 



Aglaophenia myriopliyllum (Linn.). 



Lytocarpus myriophyllum, Allman, 1883. 



Thecocarpus myriophyllum, Nutting, 1900. 



About thirty specimens were taken at Station I., 75 fathoms, and a 

 few at Station II. 



Distribution. Eecent foreign records : — Off the coast of Norway, 

 200-400 fathoms (Bonnevie). Bay of Biscay, 50-135 fathoms ; Azores, 

 70 fathoms (Pictet et Bedot). Portugal (Nobre). South of Madeira, 55 

 fathoms ; off the west coast of Morocco, 300 fathoms ; Cape Verde 

 Islands, 220-320 fathoms (Billard). 



LITEEATUEE. 

 Allen, E. J. 1899. On the Fauna and Bottom-Deposits near the Thiity-Fathom 



Line from the Eddystone Grounds to Start Point. Journ. Marine Biol. 



Assoc, vol. V. pp. 365-452. 16 charts. Plymouth. 

 Allman, G. J. 1871-1872. A Monograph of the Gymnoblastic or Tubularian 



Hydroids. Eay Soc. London. 

 Allman, G. J. 1874. Eeport on the Hydroida collected during the Expeditions 



of H.M.S. Porcnpine. Trans. Zool. Soc. Lend., vol. viii. pp. 469-481. 



Pis. LXV.-LXVIIL 

 Allman, G. J. 1883-1888. Eeport on the Hydroida dredged l^y H.M.S. Challenger. 



Part i. Plumularidee, 1883, vol. vii. 55 pp. 20 j^ls. 



Part ii. Tubularinoe, Campanularinse, etc., 1888, vol. xxiii. 159 pp. 39 pis. 

 Billard, A. 1907. Hydroides. Expeditions scientifiques du Travailleur et du 



Talisman, tom. viii. pp. 153-243. 21 text figures. Paris. 



