110 Transactions. — Zoology. 
prehensile ; ‘inner branch 2-jointed (or indistinctly 8-jointed), clawed ; 
outer branch short, 3-jointed. Three following pairs have both branches 
9-jointed. Fifth pair foliaceous, the outer branch much elongated. 
Ovisac single. 
1. Scutellidium tisboides, Claus. Pl. VII., figs. 1-7. 
Scutellidium tisboides, Claus. Die Copepoden-fauna von Nizza, p. 21, taf. iv., figs, 8-15. 
Scutellidium tisboides, Brady. Monograph of the Brit. Copepoda, vol. ii., p. 175, pl. Ixviii., 
figs. 1-10. 
Cephalothorax broad, rounded in front, first segment one-and-a-half 
times as broad as long; the postero-lateral angles of the succeeding short 
segments somewhat produced backwards; abdomen narrowed. Anterior 
antenne shorter than first segment of body, 9-jointed, and becoming 
slender towards its apex ; first three segments large, next five much shorter, 
terminal joint longer and very slender. Foot-jaws short and stout; last 
joint of the first pair slender, and bearing two curved apical claws ; hand of 
the second pair dilated at the base, subpyriform, ending in three strong 
claws. Both branches of the first pair of fect 9-jointed and thick: the 
inner branch is much the longest; the first joint dilated near the base, 
ciliated on both margins, and bearing about the middle of the inner margin 
a large plumose cilia; second joint with a stout short curved seta; last 
joint very small, and bearing two flattish blunt appendages, which are 
thickly fringed on their lower margins with fine cilia: outer branch short ; 
first joint ciliated externally and furnished with two apical spinous sete ; 
second and third joints much shorter, each with one plumose seta; ter- 
minated by four curved obtuse claws. Three following pairs of feet 
2-branched, each branch 3-jointed; external margins of the joints fur- 
nished with short stout spines, which are pectinately fringed on their 
upper margins. Fifth pair of feet 2-jointed, the basal joint marginally 
ciliated, elongated, and 2-cleft, each lobe terminating in one (or more) long 
sete ; second joint much elongated, marginally ciliated. Inner tail-sete 
considerably longer than the abdomen. Ovisac large, circular, extending 
considerably beyond the extremity of the abdomen. Length, + inch, 
exclusive of the caudal sete. 
The foregoing description, taken in part from Brady’s Brit. Copepoda, is 
verified in all the points indicated by my own examinations. In all my 
specimens the segments of the abdomen were finely pectinated with short 
sete on their posterior margins. The following characters given by Brady, 
I have not been able to identify: “ the first abdominal segment is formed 
by the almost complete union of two segments, the point of junction being 
marked by a chitinous line on each side. Eye consisting of one central and 
two lateral lenses.” 
