104 
Synopsis of the species (the genera are in chronological order). 
1. Dajus Mysidis irhøkrå w 7» ren enlig eee en Scand., Crust. 1846 
9?) PL-28, fig. 1—2 PL 29, fø: 1 
ea Em & Og Bie Account vol. 2, følg 1900, Pl. 2253, 
Pl. 93—94. 
c= —… Richardson, Monograph of Isop. N. Am., Bull. U. S. 
Nat. Mus. No. 54, 1905, p. 573 (ubi litt.), fig. 688. 
In the some of Mysis oculata or M. miæta; 
aretic, length 4 m 
x 
BY 
Dajus Siriellæ G. O. Sars, Challenger Report, Zool. vol. 13, 1885, 
Schizop., p. 220—21, Pl. 38, fig. 12—14. »Attached to the 
ventral face of the trunk posteriorly on a few specimens of 
Siriella Thomsoni Milne Edwards, both males and females, 
in the latter lying partly within vest marsupial pouch, as was 
also the case with Dajus Mysidis. 
ag 
Aspidophryxus peltatus G. O. Sars, Oversigt af Norges Crust. I, Vid. 
Selsk. Forhandl., Christiania 1882, p. 72, PL 
2, fig. 12— 
or — S sk nn Adeouit vol. 2, Isop. 1900, p. 228, 
SE == rate En Fisheries, Ireland, Sci. Invest. 
1904, pt. 1 (1905), p. 76, 82. 
DÆ En — Nels Plankton, vol. 6, 1911 
(Lief. 14), p. 244, fig. 139—44, 
p: 290, 283—87. 
— … Sarsii Giard & Bonnier, Epicarides de la fam. ve Dajidæ. 
Bull. Scient. France et Belgique, 1889, p. 266. 
Length 3 mm. On the carapace of Erythrops or £ Gaden 
Mysidopsis didelphys or Parerythrops obesa. Norway (Sars), 
Scotland (Scott), Ireland (Tattersall). Dr. Th. Mortensen has 
taken the species on Erythrops (pygmæa?), Kristineberg 
zool. St. (Gulmarfjord, Bohuslin), 60 m., 11—1—1910. 
4. MERE frontalis Bonnier, in Koehler: Isop. nouveaux de lå fam. 
Dajides. Bull. Inst Océanogr. No. 196, Monaco 1911, 
p- RR fig. 1—7. — The larva: Tattersall: RR Plank- 
ton, vol. 6, 1911 (Lief. 14.), p. 291, fig. 288— 
Length 1,4m. On rostrum of Siriella re. 349 N, ie 
89 10' W, surface. He 
5. Notophryxus ovoides G. O. Sars, Oversigt af Norges Crust. I, Vid. 
Selsk. Forh., Christiania, 1882, p. 71, Pl. 2, fig. 
—11. 
er —  -G. 0. Sars, Account vol. 2, Isop. 1900, p.226, Pl. 95. 
— —  Tattersall, Nordisches Plankton, vol. 6 (Lie. 14), 
1911, p. 252, fig. 156—61, p. 266, fig. 192. 
Length 3,5 mm., on tis abdomen of Amblyops abbreviata, Norway. 
