COPEPODA 207 



Distribution. Brady's specimens were taken in the Indian Ocean 47 L. S. 45 L. E. at the sur- 

 face. By Th. Scott it was recorded from the Gulf of Guinea, and, according to Farran, it is fairly com- 

 mon off the west coast of Ireland at depths of from 100 to 1000 fathoms; occasionally it has been found 

 at or near the surface. According to Sars it is a true pelagic form (often occurring close to the sur- 

 face of the sea), which is found along the greater part of the Norwegian coast as far north as Lofoten 

 Islands, as well as sometimes in the open sea. In the sea between Spitsbergen and Greenland as far 

 north as 8oi7 L. N. the Due d'Orleans has gathered this species in 32 samples from about 80, between 

 7/ 7 and '5/s 1905, as well in cold as in temperate water. It was neither found at the very surface 

 nor below 500 meters, but in 12 -out of 14 samples taken at a depth of from 100 to 200 meters, gene- 

 rally scarce never abundant; in 8 samples adult males as well as females were found at a depth of 

 from 20 to 400 meters. 



Remarks. I have followed Sars in referring the northern form to Brady's species from the 

 Indian Ocean, though his description is too incomplete for a certain identification. In spite of minor 

 differences, f. hist in the shape of pes V of the adult female, I am fairly convinced that Mrazek's 

 S. Romeri is identical with this species. As the species has not been found, as far as I know, in any of 

 the extensive collections from the South- and Mid-Atlantic or Indian Oceans, I think we are entitled 

 to regard this species as one which has its chief centre of distribution in the North-Atlantic and in a 

 less degree in the Arctic seas cummunicating with it. It seems not to have been found in the North 

 Sea proper or adjacent waters; may be on account of lower salinity. 



The records of the "Ingolf," which are all from the months May to July, and almost all with 

 the vertical net down to about 100 fathoms, tell the same story as the above mentioned records of the 

 Due d'Orleans; that the species in these regions and at this season is only exceptionally found at the 

 surface ; if it were not so, it must have been found in several of the numerous surface samples from 

 the Ingolf or the Danish East-Greenland Exp. It is worth recording that the species was found in 

 several surface samples gathered from the mentioned expedition in the month of September, south- 

 west of the Faeroes. The Ingolf material does not allow any final conclusion about the time of pro- 

 pagation, but as adult males were found in 19 out of 24 samples (in a percentage varying from about 

 10 to 50) taken from May to July, and as spermatophores were often attached to the genital somite 

 of the female as well as sometimes to that of the male, it is almost certain that the species is propagating 

 then. The Due d'Orleans found only males in 8 out of 32 samples. Adult males were gathered south- 

 west of the Faeroes in the month of September. Young animals of the penultimate stage were found 

 in most samples, except in those from the month of September. 



66. Scolecithricella Ingolfli n. sp. 



(PI. VIII figs IT a c). 



Description, f $. The shape of the body is practically like that of S. minor; the head is perhaps 

 a little more raised. The lateral corner is, like that of preceding species, somewhat triangularly produced. 

 The antennulac and oral appendages are completely like those of i". minor. 



The first pair of legs is scarcely different; the first inner segment of the second foot has a 



