of the Fishery Board for Scotland. 275 
coverecé with mud. This is the first time that Diastylopsis vesima has 
been observed in Scottish waters. D/astyloides biplicata, G. O. Sars, 
was also frequent in the same gatherings. 
Leptostylis villosa, G. O. Sars. (Pl. XVIIL, fig. 41.) 
This species has been added to the British fauna during the past year. 
The first specimens were obtained in the Firth of Clyde in 1896 ina 
tow-net gathering from 40 fathoms collected py the “Garland” between 
Arran and the coast of Ayrshire. It has also been observed in a tow-net 
gathering collected fifty miles south-east of Fair Island, in about 60 to 
65 fathoms, on October 19, by the steam trawler “St. Andrew.” 
Leptostylis villosa may be distinguished from its confréres by the 
peculiar form of the marginal serration of the carapace; figure 41, Plate 
XVIII., represents a small portion of the margin of the carapace, and 
shows the peculiar form of the serration. 
PSEUDOCUMID®. 
Pseudocuma similis, G. O. Sars. 
~ This species has also been lately added to the British fauna from the 
Firth of Clyde. It was obtained in a gathering collected by the 
“Garland” in moderately deep water near the mouth of the estuary in 
December, 1899. Pseudocuma similis has also been obtained in gather- 
ings collected‘ by the steam trawler “‘St. Andrew” off Fair Island in 
about 80 to 85 fathoms on October 16th, and by the ‘ Garland ” off 
Aberdeen in 42 to 45 fathoms on November 7th and 12th, 1900. 
Although it is not very difficult to recognise this Pseudocuma after the 
observer has become familiar with its peculiarities, it nevertheless so 
closely resembles the more common Pseudocuma cercaria (v. Beneden), 
with which it is frequently associated, that it may be readily passed over as 
belonging to that species. Pseudocuma similis has also recently been 
recorded from the Irish Sea,* which seems to indicate that the distribn- 
tion of this species in British waters may be fairly extensive. 
Petalosarsia declivis, (G. O. Sars). 
Petalosarsia was obtained in at deast three different gatherings 
collected by the ‘‘Garland” off Aberdeen in October and November last 
year; it occurred in a gathering from 36 to 49 fathoms collected on 
October 23rd, and in one from 60 fathoms collected on the 25th, and it 
also occurred in a gathering collected on November 7th from 45 fathoms, 
The same species was also observed in one of the gatherings collected 
by the steam trawler ‘‘St. Andrew ” off Fair Island on October 16th. 
NANNASTACIDA. 
Cumella pygmea, G. O. Sars. 
This small species occurred in the gathering catlected by the “ Gar- 
land” in 45 fathoms off Aberdeen on November 7th. It was also collected 
in Aberdeen Bay by Mr. H. C. Williamson on eutgue the Sthy 2 Uke 
species is very small and easily missed. 
* A.Scott, in Laneashire Sea. Fisheries Report for 1900 (March 1901)... 
