174 Proceedings of the Royal Physical Society. 
slender, and closely resembling those of Mara othonis, but 
the flagellum is proportionally somewhat longer; accessory 
appendage about twice the length of the last joint of the 
peduncle, and six-jointed, terminal joint very small. Inferior 
antennz somewhat similar to those of Mera othonis, as are 
also the mandible palp, and other oral parts (Figs. 1-4). 
Anterior gnathopoda rather slender, densely setose; propodos 
nearly equal in length to the carpus, oblong oval in form; 
palm imperfectly defined (Fig. 5). Posterior gnathopoda 
strong and powerful; propodos subcylindrical, length equal 
to fully twice the breadth, lower margin slightly convex, and 
with a distinct and broadly rounded but shallow prominence 
anteriorly; dactylos very powerful, longer than the propodos, 
and reaching to about the middle of the carpus, not much 
curved except towards each end, the inner edge near the 
base but slightly posterior to the prominence on the lower 
margin of the propodos, is produced into a shallow triangular 
process (Fig. 6). 
Remarks—Only the anterior moiety of this Amphipod 
was obtained; it is only provisionally ascribed to the genus 
Mera. It is apparently a male specimen, and all the parts 
of it that could be utilised resemble more or less closely the 
parts similar to them in Mera othonis, with the exception of 
the second gnathopods, which are unlike those of any other 
known to me; and as the species is apparently undescribed, it 
gives me much pleasure to add to it the name of Mr Brook. 
The abnormal Amphipoda are only represented by three 
species, viz., Phtisica marina, Protella phasma, and Caprella 
acanthifera. 
Of the Phyllopoda there is but one species—Webalia bipes ; 
and of the Cladocera, two species—Podon and Hvadne. 
The Ostracoda.—T wenty-five species belonging to this group 
were obtained in the collection, but they are species that are 
all more or less commonly distributed around our shores. 
The Copepoda.—There are forty species of this group, a 
considerable number of which are of special interest. Jsias 
clavipes, for example, has very few Scotch records. Labzdocera 
Wollastont has not previously been recorded from the Scottish 
