of the Fishery Board for Scotland. 211 
joint ; secondary branch small, one-jointed, arising from the middle of the 
second joint, and bearing four slender apical sete. Mandibles stylet- 
shaped, produced at the base into a barb-like process (fig. 28). Maxillee 
two-branched, one branch stout, and bearing three apical spines and two 
plumose sete, the other branch small, with three apical sete (fig. 29). 
The first joint of the anterior foot-jaws stout, second joint elongate and 
slender, and terminating in a moderately long curved claw and a small 
spine (fig. 30). Posterior foot-jaw four-jointed ; second joint about three 
times longer than broad, and bearing a small seta near the middle of the 
inner margin ; third and fourth joints narrow, and together scarcely equal 
in length to two-thirds of the second joint; terminal claw rather longer 
than the two preceding joints, and provided with a small seta near the 
middle of the inner margin. Both branches of the first pair of swimming 
feet two-jointed, the second joint of the inner branch large and foliaceous 
(fig. 32). %Third and fourth pairs somewhat similar to those of Licho- 
molgus fucicolus, Brady ; slender, and with the marginal and terminal 
spines of the outer branches broadly dagger-shaped (figs. 33, 34). Fifth 
pair rudimentary, bilobed, with about three apical sete (fig. 35, a). Geni- 
tal segment of the abdomen considerably dilated ; second and third seg- 
ments short, and together scarcely equal in length to the first; last segment 
equal to twice the length (of the preceding one; caudal stylets rather 
shorter than the last abdominal segment, furnished with five apical sete, 
the second seta from the inside being considerably longer than the others, 
and about equal in length to the last three abdominal segments. Ovisacs 
two, large. 
This species has been known to us. since 1889, but, because of some 
uncertainty as to whether the first specimens obtained were mature, it 
was considered expedient to defer recording it. A few months ago a 
specimen with ovisacs was obtained, and quite recently several others, 
also with ovisacs, have been secured. By the discovery of these speci- 
mens our uncertainty as to the maturity of those previously obtained has 
in a great measure been set at rest. 
Parartotrogus richardi resembles in some respects a curious parasitic 
copepod, described by Sir John Dalyell in 1851* under the name of 
Cancerilla tubulata, and which was discovered by him adhering to the 
base of one of the arms of a species of Amphiura (a kind of starfish). 
The same copepod has since been obtained on the coasts of France, and 
is described and figured by Dr Canu in his work ‘ Les Copepodes du 
‘ Boulonnais.’ But in Canceriila the cephalo-thorax is greatly dilated, 
the abdomen is very short, the anterior antenne are only six-jointed, and 
the first pair of swimming feet are more rudimentary than in Pararto- 
trogus ; and a further difference of considerable importance is, Cancerilla 
has only been obtained as a parasite, whereas all the specimens of Parar- 
totrogus that have yet been obtained were free. 
of Genus Bomolchus, Nordman (1832). 
Mikrograph. Beit. zur Naturg., II. Heft., s. 135-137. 
Animal somewhat like Lichomolgus in form. Anterior antenne 
seven-jointed. Posterior antenne three-jointed. (?) Mandibles stylet- 
shaped. Maxille simple, the apex truncate, and provided with two 
broadly ovate appendages. J oot-jaws rudimentary ; (?) anterior footjaw, 
consisting of a simple stylet-shaped joint, bearing a single plumose seta. 
Both branches of all the swimming feet three-jointed, first pair short, 
foliaceous, furnished with spathulate and densely-plumose sete; the 
* The Powers of the Creator, vol. i. p. 233, pl. lxii. figs. 1-5. 
