138 



and three ovisacs. I found further in the niarsupium of a female from the harbour of 

 Godthaab (2 — 3 fathoms, sand with sea-weeds, collected by Th. Holm 3 /vn 1886): one adult 

 female, one male in a close wrapping of threads, and two ovisacs glued together ; in the mar- 

 supium of another female from the same locality were found: one adult female, one closely 

 wrapped male, and six of the host's own eggs; in a young female without marsupium, taken 

 in a depth of ten to fifteen fathoms in that harbour were found: one small female, only 

 •34 mm. in length and nearly as broad, on which, nevertheless, occurred two spermatophores, 

 and a male, round which a few threads were spun, was also attached to it. 



REMARKS. It is an interesting fact, that the same Amphipod, Protomedeia fasciata 

 Kr., has one parasite in Denmark and another very closely allied species in West-Greenland. 

 The two parasitic species seem to be distinguishable from each other with certainty only by 

 the differences between their males. 



21. Sphaeronella longipes n. sp. 



(PI. VII, fig. 2 a— 2 g). 



FEMALE. One single tolerably large, but flattened and ill-treated specimen has 

 been found, which measures -73 mm. in length and -92 mm. in breadth, and besides, several 

 well preserved specimens, all of which, however, are but scarcely half-grown or recently 

 hatched, so that the largest one (fig. 2 a) is not more than - 46mm. long and somewhat longer 

 than broad, while a very small specimen, represented in fig. 2d and fig. 2e, is only - 26 mm. 

 long, and the proportion between the length and breadth of this animal is as 7 to 4. The 

 head is well defined. The frontal margin naked. Antennulae rather long and slender, with 

 long terminal setae. Antennas 3-jointed, third joint shorter than the second (fig. 2 c, c); terminal 

 seta about the length of the two last joints combined. Mouth-border of medium breadth. 

 Maxillulae with well developed additional branch. Maxillae with smooth basal joint. Maxil- 

 lipeds rather long and slender; basal joint naked, second and third joints coalescent, last 

 joint digitated at the end with three exceedingly short points. The sub-median skeleton 

 with a somewhat narrow list inside the maxillae, naked all over; no transverse list between 

 the head and the trunk. Lateral margin of the head naked. Trunk naked. Trunk-legs 

 compared with those of the other species of this genus exceptionally good-sized, consisting 

 of a proportionally rather long cylindrical joint, from the end of which proceeds a proximately 

 thickened very long seta, three to four times the length of the joint, and besides another 

 seta equal to, or somewhat exceeding the length of the joint. About the genital area no 

 information can be given; in the small specimens it is not developed. The caudal stylets 

 considerably shorter than the legs, each ending in three setae of unequal length, the longest 

 of them almost equalling in length the short seta of the trunk-legs. 



MALE. Unknown. 



