4 
198 Part [II——Eleventh Annwal Report $ 
sealing-wax ; the specimen is usually divided into two parts by an incision 
immediately in front of the first pair of swimming feet. The mouth ~ 
appendages and antennee, or the swimming feet, are then first carefully 
dissected off—each pair by itself—and at once mounted under a separate 
cover-glass (or bit of cover-glass). A complete series of appendages is 
sometimes mouuted on a single slide—this is done partly for convenience, 
and partly to save time—and when this is done the series always begins 
from the same end of the slide, and each appendage or pair of appendages 
occupies a particular position on the slide ; and also, if very small, it is 
surrounded by a minute ring drawn with common writing-ink. There is 
thus no confusion, time is made the most of, and comparatively few slides 
are required. 
CRUSTACEA. 
COPEPODA. 
Family Hareracticrpa. 
Genus Longipedia, Claus (1863). 
Longipedia coronata, Claus. 
As there appears to have been some misconception in regard to 
Longipedia coronata, Claus, the following description of what appears to 
be a typical female, and of two other and distinct forms that have prob- 
ably been accidentally included with it in the same species, may be of 
interest. 
Longipedia coronata, Claus. (PI. IL. figs. 1-13.) 
1863. Longipedia coronati, Claus, ‘ Die frei lebenden Copepoden,’ 
p10, ple xiv: 
1864. Longipedia coronata, Boeck, ‘ Oversigt Norges Copepoder,’ 
p-. 252. 
1880. Longipedia coronata, Brady, ‘ Mon. Brit. Copep.,’ vol. ii. p. 
6, pls. xxxXiv.-xxxv. (pars. ). 
1882. Longipedia coronata, Giesbrecht, ‘ Die frei lebenden Copep. 
‘der Kieler Féhrde,’ p. 99, pls. 1, iv.—xu. (? var.). 
1892. Longipedia coronata, Canu, ‘Les Copep. du Boulon.,’ p. 146. 
1893. Longipedia cor le, T. and A. Scott, ‘Ann. Scot. Nat: . 
‘ Hist.,’ vol. i1. pt. 2, p. 91, pl. it. figs. 4-6. ; 
Length from apex of rostrum to end of caudal stylets (exclusive of 
setae) 1-5 mm. (1,th of aninch). Rostrum broad, with a bluntly rounded 
apex. The form of the animal seen from above is narrow, elongate, and 
tapering gradually to the end of the abdomen ; the whole length is about 
equal to four times the breadth at the posterior end of the first cephalo- 
thoracic segment. Anterior antennz short, stout, and curved ; densely 
setiferous, most of the sete being plumose in varying degrees ; an elongate 
sensory filament springs from the third joint, and two similar but short 
filaments from the extremity of the antenne. Primary branch of the 
posterior antenne, three-joimted. The secondary branch is rather longer 
than the primary and six-jointed ; the joints become longer and narrower 
towards the apex, so that while the length of the first joint is equal to 
little more than half the breadth, the last is about one and a half times 
longer than broad. The posterior antenne bear numerous plumose 
sete. The mandibles have the masticatory portion broad, the 
truncate end of which is armed both with papilliform and pointed 
teeth. The two branches of the palp arise from a dilated base ; one of 
the branches is stout and apparently one-jointed ; the other is more 
