176 ME. E. T. BEOWXE— BISCAYAN PLANKTON : 



Occurrences : Surface. 22 d (1), 22 e (4), 23 b (9), 23 d (1). 



50 to fathoms. 21 g (2), 30 I (18), 3] h (6), 32 a (1), 32 A (1), 



33 c (1). 

 75 to fathoms. 30/ (5), 32^ (2), 35 c (1). 

 100 to fathoms. 21 h (26), 21 1 (20), 22 a (32), 24 b (2), 24 d (16), 



24 e (4), 25 rf (5), 30^ (2), 30 h (1), 32 n' (1), 

 32j9 (1), 33 d (2), 34 c^ (1), 35 b (1), 35/ (1), 

 36 h (1), 36 e (2). 

 150 to fathoms. 36/(1). . 

 150 to 50 fathoms. 21 ji (7). 

 200 to fathoms. 36 g (1). 

 200 to 100 fathoms. 21 o (4), 35 m (1). 

 250 to fathoms. 36 i (1). 

 300 to 200 fathoms. 21 c (1). 

 500 to 400 fathoms. 21 m (2). 

 750 to 500 fathoms. 22 h (1). 

 1000 to 750 fathoms. 23 a (1). 

 1250 to 1000 fathoms. 24 a (1). 



It appears from the numher of hauls in which Aglantha occurs that it was chiefly 

 inhabiting the lower part of a zone between 50 and 100 fathoms. It was scarce at or 

 near the surface, and also at depths below 100 fathoms. 



Disiribniioii. — Norway ; Shetland Is. ; North Sea ; Fseroe Channel ; west coast of 

 Ireland ; mouth of the English Channel. 



Aglantha sp. B. 



There are six specimens of an Aglantha which I have isolated on account of the radial 

 canals being twice the width of the canals of Aglantha rosea, and also because the 

 umbrella is about as broad as long. These specimens are without gonads, and the 

 sense-organs could not be found. I think that they must be young stages of another 

 species, perhaps Aglantha digitalis. The largest specimen measured 7 mm. in length 

 and width. 



Occurrences : 750 to 500 fathoms. 22 b. 



1000 to 750 fathoms. 23 a. 



1250 to fathoms. 27 a (trawl). 



1500 to 750 fathoms. 30 a (trawl). 



Aglatjra hemtstoma, Peron et Lesueur, 1809. 



Af/laura hemistoma, Haeckel, 1879, p. 275, Taf. 16; Maas, 1893, p. 25, Taf. 1 ; Mayer, 1900, p. 65, 

 pi. 25 ; Vanlioffen, 1902, p. 78; Mayer, 1904, p. 26, pi. 4 ; Lo Bianco, 1904, p. 55, fig. 138. 



The collection contains about 130 specimens, a few of which are in good condition. 

 The umbrella of the largest specimen measured about 3 to 3*5 mm. in height and about 



