154 



Part III. — Fifteenth Annual Report 



(?) Liclwmolgus maximus, I. C. Thompson.— Obtained in specimens of 

 the common Pecten — Pecten opercularis — from Loch Gair, off Inveraray, 

 and from near the head of the loch (G.). This is not a true Liclwmolgus, 

 and is only provisionally placed here. 



Pseudardhessius liber (Brady and Robertson). — This species is from 

 the same localities as the last (G.). 



jDermatomyzonnigripes (Brady and Robertson). — This fine species has 

 been obtained in East Loch Tarbert (Calderwood) ; and near the head of 

 Upper Loch Fyne (G.). 



Artotrogus orbicularis, Boeck. — A single S and 9 specimen of this 

 fine species were taken in material dredged at Tarbert Bank, Loch Fyne, 

 in 20 to 25 fathoms (G.). 



t Bradypontius magniceps (G. S. Brady). — Has been recorded for East 

 Loch Tarbert (Calderwood) • it has also been obtained near the head of 

 Upper Loch Fyne among trawl refuse (G.). 



Bradypontius Normani (B. and R.) (PI. II. figs. 1 and 2 ; PI. III. 

 figs. 1-11). 



Description of the female. — Length of the specimen figured, 1*5 mm. 

 (jg- of an inch). In general appearance somewhat like Bradypontius mag- 

 niceps, G. S. Brady, but the abdomen is more elongate and slender (fig. 1, 

 PI. III.). Anlennules short and nine-jointed ; the first joint is of moderate 

 length, the third is fully three times the length of the preceding joint j 

 the next five joints are small, while the last is nearly twice the size of the 

 penultimate joint (fig. 3, PI. III.). The formula shows approximately the 

 proportionate lengths of the joints. 



Proportionate lengths of the joints, . 13 * 5 • 17 ' 7 ' 5 ' 6 • 5 • 7 * 13. 

 Number of the joints, . . . 1 • 2 • 3'4-5*6-7'8 - 9. 



The antennae are somewhat like those of Asterocheres Boecki, G. S. Brady ; 

 the secondary branch is small and uniarticulate, and bears a single apical 

 seta (fig. 5, PI. III.). The mandibles are elongate and very slender (fig. 6, 

 PI. III.). The maxillae consist of two small branches, as shown by the 

 figure (fig. 7, PI. III.). Both foot-jaws are robust and strongly clawed 

 (figs. 8 and 9, PI. III.). The swimming feet, which are robust, have the 

 inner margins of both branches furnished with numerous plumose setae 

 (figs. 1 and 2, PI. II.). The secondary joint of the fifth pair is small and 

 sub-quadrangular, and furnished with three setae ; a single seta also 

 springs from the basal joint (fig. 10, PI. III.). The abdomen is composed 

 of four segments — genital segment larger than the others. 



Description of the male. — The male differs slightly in its general 

 outline from the female ; the abdomen is five-jointed, and the genital seg- 

 ment is rather larger than the others. The antennules are ten-jointed ; the 

 first six are nearly as in the female ; the seventh joint is about equal to 

 the combined lengths of the three preceding joints ; the eighth, ninth, and 

 last are each rather smaller than the one that immediately precedes it ; 

 the antennae are hinged and adapted for grasping (fig. 4, PI. III.). The 

 other appendages resemble those of the female. 



t See Dr Giesbrecht on the family Ascomyzontidce, Thorell. (Zoologischen 

 Anzeiger, Nos. 521, 522, 1897.) 



