CHAETOGNATHS 



place is new for the species. It does not occur in the vertical hauls of the "Iugolf", but appears 

 in some of the "Thor"'s, which were made in the North Sea, Skagerrak and Kattegat all from 

 shallow depths. 



Sagitta elegans Verrill 



Represented everywhere in the regions investigated by the "Ingolf" both in the vertical and 

 surface hauls. The "Thor" more rarely took this species, which is however very common in the North 

 Atlantic Ocean. 



Sagitta maxima (Con ant) 



Almost regular in its occurrence in the vertical hauls of both Expeditions from greater depths, 

 twice — "Iugolf" St. 26, "Thor" St. 102 (1904) - some very young specimens also from shallower. In spite 

 of this occasional occurrence of the species in the epiplankton, assuming that no mistake is contained 

 in the data given me, the mesoplankton must be considered its true region of distribution according 

 to all other observations. 



Sagitta lyra Krohu 



On the Ingolf Expedition only once taken in the North Atlantic at 62 N. L., 2i°36'W. L. from 

 100 fathoms; the "Thor" obtained it at several places in at least 150 m. 



Sagitta planctonis Steinhaus 



The only station of the "Ingolf", where this species was observed, is a vertical haul from the 

 Davis Strait at 63"6' N. L,., 56 W. L. from a depth of 200 fathoms. In the deeper hauls of the "Thor" 

 on the other hand it frequently occurs. Station 152 (1904) 65° N. L., i8°io' W. L. is at the same time 

 the northernmost point at which .S'. planctonis has hisherto been observed. 



Sagitta macrocephala Fowler 



Only taken in two hauls of the "Thor" from 900 m. (St. 180, 1904! and 1400 m. (St. 76, 1906)- 

 (Cf. Eukrohnia fowleri). 



Eukrohnia hamata (Mob.) 



Appears almost regularly in the vertical hauls of the "Iugolf and "Thor"; also several times in 

 the surface hauls of the former Expedition. 



Eukrohnia fowleri Ritt.-Z. 



The two hauls from which S. macrocephala was obtained also contained E. fowleri. One of 

 these stations (180, 1904) at 6i°34' N. L. lying south of Island is the northernmost point at which these 

 cosmopolitan deep-sea species have hitherto been directly observed. Station 71 of the "Thor" (1905) 

 also contains E. fowleri but not -V. macrocephala. 



