27 



The present species is closely allied to E. longicauda, but is easily 

 distinguished by the comparatively more robust form of the body, and more 

 particularly by the considerably shorter caudal rami. 



Occurrence. I have found this form not unfrequently in several places of 

 the Norwegian coast, for instance at Eleven and Korshavn on the southern coast, 

 and at Aalesund and Christiansund on the western coast. It is a more pronounced 

 deep-water form than the preceding one, being generally found in depths ranging 

 from 20 to 60 fathoms, especially where the bottom consist of coarse sand inter- 

 mingled with mud. It is very perplexing, that this form has not yet been ob- 

 served off the British Isles, the Copepod-fauna of which has been so thoroughly 

 studied, especially by Th. Scott. 



Distribution. Gulf of Naples (Giesbrecht). 



12. Euryte curticornis, G. 0. Sars, n. sp. 



(PI. XIV). 



Specific Characters. Female. Body somewhat less robust than in the 

 preceding species, with the anterior division ovate in outline, the cephalic segment 

 being somewhat contracted in front. Last trunk-segment less produced laterally 

 than in the other 2 species. Tail exceeding somewhat half the length of the 

 anterior division, genital segment with only a slight rudiment of the lateral 

 denticles so conspicuous in the 2 preceding species. Caudal rami about equalling 

 in length the last 2 segments combined, and not at all diverging, tapering slightly 

 distally; apical setae of moderate length, the 2 middle ones clothed in their prox- 

 imal part with rather coarse and distant hairs. Anterior antennae much shorter 

 and thicker than in the 2 preceding species, though composed of a similar great 

 number of joints (20), most of the setae rather coarse and finely ciliated. Posterior 

 antennae of a similar structure to that in E. robusta. Posterior maxillipeds less 

 abruptly curved and having the terminal part much shorter, with the apical claws 

 extremely minute. Natatory legs built in the same manner as in the 2 preceding 

 species, though having the rami somewhat less broad and the spines more slender. 

 Last pair of legs likewise of a very similar structure, last joint, however, com- 

 paratively shorter. Ovisacs rather large, and borne closely appressed to the sides 

 of the tail. 



Colour not yet ascertained. 



Length of adult female 1.30 mm. 



Remarks. This new species may be at once distinguished from the 2 

 preceding ones by the much shorter an stouter anterior antennae, which character 



