412 bulletin: museum of comparative zoology. 



Diphyes cymba Quoy & Gaimard, 1834, p. 95, pi. 5, fig. 12-17. 

 Nacella sagittata Blainville, 1830, p. 120; 1834, p. 131, pi. 4, fig. 2. 

 Ceratocymba spectabilis Chun, 1888, p. 1160. 



Ceratocymba sagittata Chun, 1897, p. 33; Bedot, 1904, p. 1, pi. 1, fig. 1; Moser, 

 1911, p. 431; 1912a, p. 538, fig. 22; 1913a, p. 149. 



The synonymy of the polygastric generation is: — 



Diphyabijla hubrechti Lens & Van Riemsdijk, 1908, p. 36, pi. 6, fig. 47; Bigelow, 

 1911b, p. 231, pi. 12, fig. 7; Moser, 1911, p. 431; 1913a, p. 149. 



The polygastric generation was taken as follows : — 



and 2 inferior nectophores 

 and 1 inferior nectophore 

 and 1 inferior nectophore 

 and 1 inferior nectophore 



and 2 inferior nectophores 

 and 1 inferior nectophore 



The free eudoxid was taken at Stations 10,161, 10,162, 10,163, 

 10,166, 10,169, 10,171, 10,173, 10,178, 10,180, 10,182, 10,184, 10,186, 

 10,187, 10,188, 10,194, 10,195, 10,198, 10,203, 10,208, 10,211; a total 

 of about 140 specimens. 



Since Moser (1912a, 1913a), whom I can corroborate here, has 

 found that Ceratocyviba sagittata is the free eudoxid of Diphyabyla hu- 

 brechti,^ the former (older) name must, of course, be employed. The 

 superior nectophores range, in length, from 9 to 31 mm.; the inferior 

 nectophores from 20 to 40 mm. 



Superior nectophores of this species have already been figured, 

 and described in detail by Lens and Van Riemsdijk (1908) for a large, 

 by me (1911b) for a small specimen. The present series connects 

 these two extremes, showing that the slight differences in outline, 

 between the two, are merely indications of different stages in growth. 



' Moser (1913a, p. 149) states that I have believed C. sagillala to be the eudoxid of Abyla 

 leuckariii; but this was an error on her part, it being C asymelrica Lens and Van Riemsdijk which 

 I BO identified (1911b, p. 219) ; and probably correctly, as pointed out below (p. 414). 



