CRUSTACEA COPEPODA. II. 79 
The other host is somewhat larger, without ova; in a considerable swelling 
on the left side of the carapace is found I adult female and 5 ovisacs. 
— Besides the tube with the two shrimps contained a male Phyyxus 
abdonunalis Kr. which probably had been affixed on the specimen with- 
out ova. 
Distribution. — Kara Sea, in the branchial cavity of Spivontocaris Gaimardii and S. polaris (H. J. 
Hansen). As stated above (p. 78) it may be possible that the specimens of Choniostoma from the Murman 
Sea and Finmarken belonged to this species. 
Family Herpyllobliide. 
This family was established by the present writer in 1892 in a small paper which is quoted below 
at Herpyllobius arcticus; it contains the description of a most curious parasitic Copepod Rhizorhina Ampe- 
lisce H. J. H. (the genesic name ought to be written Rhizorrhina) and additions to our knowledge of the 
male of Herpyllobius arcticus. 'To the new family I referred Herpyllobius Stp. & Ltk. (Sileniwm Kr.), Eury- 
silenum M. Sars and Riuzorrhina H. J. H., “with considerable probability” Saccopsis Levinsen and Brado- 
phlula Pevinsen, not improbably Tvophoniplila Brady: M’Intosh (1885) and possibly Oestrella Levinseni 
M'Intosh (1885). All forms, excepting R/izorrhina, are parasites on Annelids. 
Only two of the genera, viz. Herpyllobius and Riizorrhina, may be said to be rather well known. 
The female consists in these genera (and in Eurysilenium) of two portions joined by a short stalk; the portion 
found outside the host is a more or less subglobular, limbless body containing the reproductive organs and 
bearing two ovisacs; the stalk is either a short tube or two very thin tubes lying close together; the portion 
within the host consists either of ramified tubes (Rhizorrhina) or of a large, very oblong, flattened (Herpyl- 
lobius) or round (Eurysilenium), soft body without vestige of any external organ. In all cases the animal 
is partly endoparasite, as the portion within the host is free, not surrounded by any chitinous membrane 
belonging to the host. The larval males fasten themselves in the first Cyclops-stage (R/uzorrhina) or in the 
second Cyclops-stage to the skin of the female more or less near its genital apertures by a viscous substance 
from the larval mouth. Later on the male is seen within the larval cephalothorax as a limbless body without 
mouth or any other organ; in Herpyllobius (not in Riizorrhina) the male develops anteriorly a small, conical 
part which breaks through the front of the larval skin and fastens its end by a viscous substance on the female. 
In older males most of the body is occupied by two enormous spermatophores, which in Rhizorrhina send 
their ducts through a ring in front of the larval mouth, while in Herpyllobius the ducts project through the 
above-mentioned rupture in the larval skin in front of the larval mouth and behind the secondary frontal 
fixation of the male itself. 
These statements may be sufficient here for the general characterization of this extremely curious 
family. Most of the literature on the family is in Danish, and the major part has unfortunately a controversial 
character; the most exhaustive treatment (80 pages) is found in my book published in 1900 and quoted at 
Herpyllobius arcticus. | 
Only two of the genera enumerated above are found in the “Ingolf”’ area. 
