4 C. BOVALLIUS. REMARKS ON THE GENUS CYSTEOSOMA. 
pellucida, must be ranged as a distimet species, which still 
may keep its name. The males described 1875 (1. ec.) are 
perhaps identical with GUÉRIN'S species and may be pla- 
ced there, awaiting a closer examination. WILLEMOÉS-SVEM 
thought that the peculiarities of the animal were too im- 
portant to allow its union with any of the old families of the 
Hyperids. He would establish for it a new family Cystisomide. 
As the name Cysteosoma or Cystisoma has been pre- 
viously given to a genus of Coleoptera by Westwood, it must be 
rejected and consequently the name of WILLEMOES-SUHM Thauma- 
tops 1) be substituted. 
The above mentioned two specimens, belonging to the Zoolo- 
gical State Museum at Stockholm and to the University-Mu- 
seum at Copenhagen, are two different species, and as both 
differ in some important characteristics from the old species, 
I must propose new names for both of them. 
The name of the family ought to be: 
Thaumatopsidze. 
Syn. 1875. Cystisomide. R. v. WILLEMOÉS-SUHM. Transactions of the 
Linnean Society. Ser. 
II. Zoology, vol. 1, 
part 1, p. 24. 
Diagn. Hyperids with large, tumid head. The eyes large, 
occupying the upper parts of the head. The first pair of an- 
tenne straight or angularly bent, not tumid. The second 
pair rudimentary. The mandibles without palp. The seventh. 
pair of pereiopoda not transformed. The inner ramus of the 
uropoda coalesced with the peduncle; the peduncles very thick. 
The family Thaumatopside is to be ranged between the fami- 
lies Mimonectide?) and Phronimide. It also shows some rela- 
tions to the family formed by the genus Tyro, MILNE-EDWARDS ?). 
The family contains only one genus: 
') It must be written Thawmatops, as it is derived from Oavun, I«uvurTos 
and ”Nw. 
2) See C. BOVALLIUS »Mimonectes, a remarkable genus of Amphipoda Hy- 
peridea» in Acta Soc. Scient. Upsaliensis. Ser. III, vol. 13, Upsala 1883, 
piu2 
3) See C. BOVALLIUS >On some forgotten genera among the Amphipodous Cru- 
stacea», in Bihb. till K. Svenska Vet. Akad. Handl. Bd 10. N:o 14, Sthm 
1885, p. 12. 
