126 TANAIS. 
we have but little hesitation in referring to it the 
specimens from the South Coast of England, Berwick 
Bay, and Glasgow, agreeing as they do with a specimen 
in the Hope Collection at Oxford, bearing the label 
of that name in the handwriting of, and most probably 
collected by, Signor Costa, in the Bay of Naples.* 
There are, however, several characters in which our 
specimens agree so closely with those described below 
under the name of Paratanais Dulongu, that we 
should not be surprised if it should be ascertained 
that (notwithstanding the remarkable clothing of the 
basal segments of the tail) these individuals should 
prove to be the females of the former. We were 
at first, indeed, disposed to regard these specimens as 
being the 7. tomentosus of Kréyer, from the Norwe- 
gian Sea, but that species is described as having ‘‘ omnes 
fere corporis partes pilis longissimis crispis obsite,” 
which is certainly not the case with our specimens. 
It must, however, be observed that some of our speci- 
mens of large size are entirely destitute not only of 
the ventral scales forming the incubatory pouch, repre- 
sented by Rathke and Miller, but also of the appen- 
dages alluded to above as representing the branchie 
according to Mr. Spence Bate. 
The general proportions of the animal agree with those 
of T. Dulongii, except that the body is comparatively 
somewhat more robust. The head is broader than in 
T. Dulongii. The relative size of the two pairs of an- 
tennee are shown in the above woodcut, the upper pair 
having a slight rudimental flagellum concealed among 
* In his description Prof. M. Edwards describes the three first segments 
of the abdomen as ‘‘tres poilus lateralement,”’ but the rudeness of his 
figure leads us to infer that the hairs extend to the dorsal surface of those 
segments, 
