of the Fishery Board for Scotland. 149 
drawing is given of them. In both branches of the third pair the armature 
of the first and second joints resembles that of the same joiuts in the first 
pair, but in the third joint of the outer branches there are three short 
spines on the outer margin, five setee on the inner margin, besides a 
moderately stout terminal spine; while that of the third joint of the 
inner branches has three setz on the inner margin, a small seta on the 
outer margin, and a stout spine with a seta in front of it at the apex 
fig. 9). 
In ie fourth pair the outer branches only are developed, and resemble 
the outer branches of the third pair; the inner branches are represented 
by a minute digitiform process (fig. 10). 
The fifth pair very minute. 
Habitat.—Dredged in the vicinity of Culross, a few miles above 
Queensferry, Firth of Forth. 
This form is in some respects similar to Dyspontius striatus, but it 
differs in having only eight-jointed antennules and in the abdomen being 
very short. The male is unknown. . 
Fam. NIcorTHoiIps. 
Genus Nicothoé, Aud, and M. Edw., 1826. 
Nicothoé astact, Audouin and M. Edwards. 
1826. Nicothoé astaci, Aud. and M. Edw., Ann. Sci. Nat., Ist 
ser., vol. ix., p. 345, taf. 49, figs. 1-9. 
Dr. H. C. Wiiliamson, while examining a lobster sent to him from 
Dunbar, observed this curious parasite adhering to one of the gills and 
kindly handed it over to me. This is the first specimen of Vicothoé I 
have seen from the Forth district. The distribution of this species, so 
far as concerns the British Islands, appears to be coextensive with its 
host. 
Fam. CHONIOSTOMATIDA, 
Genus Spheeronella, Salensky (1868). 
Spheronella minuta, T. Scott. Pl. xii., fig. 18; pl. xiii, fig. 16. 
This small form—parasitic on the Amphipod Perioculodes longyumanus 
(Spence Bate)—was described in Part III. of the Twenty-second Annual 
Report of the Fishery Board for Scotland, published in 1904 (pl. xv., figs. 
11-15). One or two more specimens of Perioculodes infested with the 
same species of Sphwronella were recently observed in gatherings of 
small Crustacea collected in the Moray Firth by Dr. H. C. Williamson, 
to whom I am indebted for the specimens. Figure 18, plate xii., shows a 
Perioculodes with a parasite in situ, and figure 16, plate xiii, shows an 
enlarged drawing of an adult female bearing two ovisacs, each of which 
is about as large as the parasite itself. 
Spheronella minuta, var. valida. PI. xiii., fig. 17-20. 
This form, which was obtained in the marsupium of an amphipod, 
Melamphopus cornutus, Norman, resembles Sphweronella minuta so closely 
except in size, that I can only regard it as a large variety of that species. 
The female, which is represented by the drawing (fig. 17, pl. xiii.), 
measures ‘72mm. in length, or about one and a half times the size of 
S. minuta. The body is globular in form and the appendages, so far as 
