200 Part ILI —Seventeenth Annual Report 
Cletodes tenuipes, T. Scott. 
1897. Cletodes tenuipes, T. Scott, Fifteenth Ann. Rep. Fish. 
Board for Scot., Pt. ILT., p. 170, Pl. I., figs. 19-27. 
This species, which is apparently rare, was also obtained in the same 
gathering from Cromarty Firth in which the Huntemannia occurred. 
Cletodes tenuipes was described from Clyde specimens, and it is interesting 
now to find it also on the East Coast. 
Cletodes perplera, sp. n. (Pl. XI, figs. 12-20; Pl. XII, fig. 1). 
Description of the Female.—Leneth of the specimen figured *67mm. 
(34 of an inch). The body is stout anteriorly but tapers gradually 
towards the posterior end ; in spiritspecimens the tail is generally incurved 
as shown in the figure (fig. 12, Pl. XI.). Rostrum short and slightly 
recurved. Antennules very short, moderately stout, and composed of 
five joints ; the first and second joints are large; the third is about half 
the size of the second ; the fourth is very small; and the last is about one 
and a half times the length of the third (fig. 13, Pl. XI). The approxi- 
mate proportional lengths of the various joints are shown in the formula— 
Numbers of the joints, 1 22 eae 
Proportional lengths of the joints, 21 ° 25 +: 12-4: 19 
There are a number of coarsely plumose setz on the distal half of each 
antennule, and a small asthetask springs from the end of the third joint. 
Antenne three-jointed ; secondary branches small, each furnished with 
two coarsely plumose setse aud a small hair (fig. 14, Pl. XI). Mouth 
organs nearly as in Cletodes linearis (Claus) ; figs. 15 and 16, Pl. XI, 
show the form of the anterior and posterior foot-jaws. The inuer branches 
of the first four pairs of swimming feet, which are all two-jointed, have 
the first joint small, while the second is slender and elongate. The inner 
branches of the first pair have the first joint somewhat dilated, while the 
principal terminal seta of each is fully three times the entire 
length of the inner branches; these brauches are also somewhat shorter 
than the three-jointed outer branches (fig. 17, Pl. XI). The inner 
branches of the second, third, aud fourth pairs are comparatively shorter 
than those of the first pair, and the terminal sete of both the inner and 
outer branches of these three pairs are long and plumose (fig. 18, Pl. X1.). 
The fifth pair of feet differ from those usually observed in Cletodes; the 
basal joint, which is proportionally much dilated, is produced into a large 
and strong spine-like process which is slightly curved at the end and 
bordered with minute spinules; the secondary joint is rudimentary, and 
bears three small sete at its truncate apex; two set spring from the 
opposite margin of the large basal joint (fig. 19, Pl. XI.). The caudal 
furcee are long and slender ; two small sete spring from near the middle of 
the outer margin of each of the furcee, and they each bear a long spini- 
form terminal seta (fig. 1, Pl. XII). 
The male differs little from the female, except that the antennules are 
modified in the usual way. The fifth pair of thoracic feet are nearly the 
same as those of the female (fig. 20, Pl. XI.). 
Habitat.—Vicinity of Smith Bank, Moray Firth. Rare. 
Remarks.—This very distinct species was obtained amongst somo 
dredged material collected on the 6th October 1898, and sent to me by 
Mr. F. G. Pearcey. The fifth thoracic feet form one of the most striking 
characters of this species, not only because of their remarkable form, but 
also because in all the specimens examined they projected nearly straight 
out from the body of the animal instead of being adpressed, as is usually 
