154 



armed outside with an exceedingly strong spiniform appendage; while another 

 peculiarly transformed appendage projects from near the tip, and is connected with 

 the base of the former by a narrow chitinous strip running along the under sur- 

 face of the joint, the freely projecting part of the appendage being folded abruptly 

 upon itself in a peculiar manner, and terminating in a very narrow upturned point. 



Body in both sexes of a pale yellowish green colour, and generally filled 

 with numerous refracting oil-globules. 



Length of adult female about 1 mm. 



Remarks. The above-described species is unquestionably identical with a 

 form recorded by Th. Scott from the Arctic Ocean under the name of Dactylopus 

 Stromi, var. arctica. As this form in reality is very different from Dactylopus 

 Stromi Cls. (= D. vulgar-is G. 0. Sars), I have felt justified in reviving for it a 

 MSname given to this form by the late Dr. A. Boeck. Its nearest ally is evi- 

 dently A. similis, from which species it may be easily distinguished, however, 

 by its more robust body, the distinctly 9-articulated anterior antennae, and the 

 structure of the 1 st pair of legs and that of the inner ramus of the 2nd pair in 

 the male. 



Occurrence. I have found this form occasionally off the west coast of 

 Norway at Christiansund and Aalesund in moderate depths among algae. Off the 

 Finmark coast, this species is much more frequently met with. I have myself 

 taken it at Hammerfest and Vadso, and in some samples taken by Mr. Nordgaard 

 at Repvaag in the Porsanger Fjord, and kindly sent to me for examination, this 

 form occurred rather abundantly. 



Distribution. Arctic Ocean, off Franz Josef Land (Scott), and polar islands 

 north of Grinnell Land (2nd Fram Exped.). 



97. Amphiascus minutus (Glaus). 



(PL XCVI). 

 Dactylopus minutus, Glaus, Die freilebenden Copepoden. p. 126, PI. XVI, figs. 14, 15. 



Syn: Diosaccus abyssi, Boeck. 

 Dactylopus longirostris, Scott (not Glaus). 



Specific Characters. Female. Body moderately slender and slightly attenu- 

 ated behind. Cephalic segment about the length of the 3 succeeding segments 

 combined; rostrum well developed and of usual appearance. Urosome about 2 / ;; 

 the length of the anterior division of the body, last segment much shorter than the 

 preceding one. Caudal rami very short, being almost twice as broad as they arc 



