249 Part ITI.—Seventeenth Annual Report 
parts of the Clyde and Loch Fyne. Hucheta appears to be even more 
restricted in its distribution than Bradyidius. According to Sars (‘‘ Norw. 
North Sea Exped.,” Crust., Part L, p. 284), this species was at first 
ascribed by Boeck to Hucheta prestandree, Philippi, but was afterwards 
described by him under the name which it now bears. 
Scolecithrix hibernica, A. Scott. 
1896. Scolecithrix hibernica, A. Scott, Ann. and Mag. Nat. 
Hist., (6) vol. xviii, p. 362, Pl. XVII. and XVIII. 
This species, though only recently discovered, is at times not very rare 
in the Clyde and Loch Fyne tow-net gatherings. The following records 
of its occurrence will indicate sufficiently the wide distribution of the 
species in the Clyde district. During August last year it was obtained 
at Stations ]1I. and IV. (iu Kilbrennan Sound), and at Stations XIII, 
XIV., XV., and XVII. (Upper Loch Fyne), and in September at 
Stations VII. and VIII. (4 or 5 miles south of Ailsa Craig). 
I have now to record its occurrence for the first time in the Moray 
Firth, having obtained it in a tow-net gathering collected in June last 
year at Station XVI. (vicinity of Smith Bank) from a depth of about 
forty fathoms, but it was apparently rare in this gathering. The opinion 
expressed by the describer of the species that Scolecithrix hibernica was 
really a deep-water form, and that its being so would partly account for 
its having been so long overlooked, is more or less confirmed by what is 
observed regarding its distribution in the Clyde and in the Moray Firth. 
Scolecithrix pygmeza, sp. n. (Pl. X., figs. 1--9). 
Description of the Female.—Somewhat like Scolecithrix hibernica, A. 
Scott, in general appearance but smaller, the length of the specimen 
figured is, exclusive of tail sete, ‘95 mm. (about 4 of aninch). The 
rostrum is small. The last segment of the thorax is produced on each 
side into a hook-like process (fig. 1). The antennules are scarcely as long 
as the thorax; they are twenty-four jointed ; the first two joints are 
moderately large ; the third to the seventh are smaller; but the eighth is 
about twice as long as the preceding joint, and sub-equal in length to the 
first and second. The joints that immediately follow the eighth are 
shorter, but the others gradually increase in length, so that several of the 
last joints are about as long as the eighth. The end joint is very small. 
The antennules are only sparingly setiferous, but the terminal joints are 
furnished with a few plumose hairs as shown by the figure. The formula 
gives approximately the proportional lengths of all the joints, as 
follows :— 
Numbers of the joints, 1:2 °3°4-5°6-7 ‘8 '9°10°11-12-13-14:15°16-17:18'19°20°21 2223-24 
Lengths of the joints, 12°15°8:5°6'°6°6"12°8 *7 “8 *9 -9 -9 ‘9 °11°11 11°11 11-10-14" 
The antenne, mandibles, and maxille are all somewhat similar to those 
of Scolecithrix hibernica. The anterior foot-jaws are furnished with 
several lobes on the inner aspect as in Scolecithrix dubia, Giesbrecht. 
The distal lobe is armed with a long slender spine, but the others are 
setiferous. The special joint of each of the anterior foot-jaws carries a 
number of the long slender worm-like hairs which form one of the 
principal characters of the genus (fig. 3). The posterior foot-jaws are 
elongate, and somewhat like those of Scolecithrix hibernica (fig. 4). 
The first four pairs of swimming feet are also somewhat similar to those 
of Scolecithrix hibernica, except that the marginal spines of the outer 
