210 Part ITI.—Eleventh Annual Report 
margin of each stylet is ciliated, the outer margin plain; terminal sete, 
four unequal, the two intermediate densely plumose, and slightly thickened 
in the middle. 
Habitat.-—‘ Rath ground,’ north of the Bass Rock, Firth of Forth, rare, 
in material dredged November 20th, 1889. One specimen was also ob- 
tained in some material dredged in 1892 off the south end of the Island 
of Mull. 
Cyclopicera purpurocincta appears to be intermediate between Cyclopr- 
cera gracilicauda and Cyclopicera nigripes, but is at once distinguished 
from either by the colour of the second, third, and fourth thoracic seg- 
ments. 
Cyclopicera lata, Brady. (Pl. III. figs. 41, 42.) 
1872. Cyclopicera lata, Brady, ‘Nat. Hist. Trans, Northumb. and 
‘Durham,’ vol. iv. p. 433, pl. xvii. figs. 3-8. 
1868. Ascomyzon echinecola, Menem, ‘Brit. Assoc. Report,’ p. 
300. 
1880. Cyclopicera lata, Brady, ‘ Mon. Brit. Copep.,’ vol. i1i. p. 56, 
pl. Ixxxix, fig, 12; pl. xe. figs. 1114, 
Habitat.—West of Gullane Ness, Firth of Forth. Washed from sponges, 
1889. Several specimens were obtained. Cyclopicera lata closely re- 
sembles Artotrogus hoeckii, Brady, which I have also obtained by washing 
Chalina oculata (a kind of sponge), and for this reason I had some doubts 
as to its being distinct, and deferred recording its occurrence ; but having 
recently been enabled to make a careful examination of its structure, I 
have now no doubt that it is the species described as Cyclopicera lata in 
the Monograph of the British Copepoda: the structure of the anterior and 
posterior antennz is the same, the mandible palp, which is very small, 
bears two apical sete, one very long, slender, and sparsely plumose, and 
one very short (fig. 41). The abdomen is less robust, and the caudal 
stylets distinctly more elongate than in Artotrogus boeckit. 
Genus Parartotrogus, T. and A. Scott (1893). 
Parartotrogus richard, T. and A. Scott. (Pl. IV. figs. 25-35.) 
1893. Parartotrogus richardi, T. and A. Scott, ‘Ann. and Mag. 
‘Nat. Hist.,’ ser. 6, vol. xi. p. 210, pl. vii. figs. 1-11. 
Habitat.—Near Fidra, Largo Bay, the ‘ Fluke Hole’ (off St Monans), 
and other parts of the Forth between Inchkeith and May Island. 
This species, which is only about the one-fiftieth of an inch in length, 
is readily distinguished by the peculiar subrhomboidal form of the 
cephalo-thorax (fig. 25). Seen from above, the sides of the cephalo-thorax 
diverge rapidly from the broad, almost truncate rostrum to about the 
middle of the first segment, where they form bluntly-rounded angles by 
again tapering quickly towards the last segment; the greatest breadth 
of the first segment is about equal to three-fifths of the entire length of 
the animal ; the abdomen is moderately stout, and equal to about three- 
sevenths of the length of the cephalo-thorax. Anterior antenna, nine- 
jointed, sparingly setiferous, the third, fourth, and fifth joints much 
shorter than any of the others. The relative length of the joints is shown 
by the formula— 
12 eae Be G10 S12 es ee 
1D 0 har ie uae al 
Posterior antenne four-jointed, and terminating in a stout hooked claw ; a 
small curved and stout spine springs from near the middle of the last 
a Se 
