382 bulletin: museltai of comparative zoology. 



series, I am convinced that they were H. anonyma, the apparent 

 absence of terminal tentacular knobs being merely an evidence of 

 mutilation. 



Heterotiara anonyma ]\Iaas. 



Heterotiara anonyma Maas, 1905, p. 19, pi. 3, fig. 19-21; Bigelow, 1909a, 

 p. 216, pi. 41, fig. 12, 13; 1913, p. 25; Vanhoffen, 1911, p. 211, pi. 22, 

 fig. 3, 4; Hartlaub, 1913, p. 350. 



The collection contains the following series : — 

 Station 



10,208 

 10,200 

 10,205 

 10,205 

 10,205 

 10,205 

 10,200 



Also two much contracted specimens from Station 10,200, 75-0 

 meters, and one from Station 10,203, 75-0 meters. 



These specimens add nothing of importance to my earher (1913) 

 account, except for the presence of young tentacles in two of them; 

 something never before observed in this species (1913, p. 26). Did 

 all these young tentacles develop, a total of fifteen would result for 

 one of the Bache specimens; but the maximum number of fully 

 developed tentacles so far counted in any H. anonyma is twelve. 



In the Bache, as in the northwest Pacific specimens, the surface of 

 the high arched bell is smooth, with no trace of the four interradial 

 folds noted by Maas (1905). And as these do not appear in any 

 specimen recorded since the species was first described, they were 

 probably a contraction-phenomenon. 



All tentacles that are intact bear spherical terminal knobs. In all 

 the present series the manubrium is so strongly contracted that no 

 account of the gonads is possible. 



The most interesting feature about this series is its Atlantic origin, 

 all previous records for the genus being from the Pacific Ocean, the 

 Indian Ocean, or seas tributary to them. 



