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Part III.— Eighteenth Annual Report 



longest diameter, and is of a blackish colour ; it is therefore easily over- 

 looked. The species have only hitherto been observed in Cromarty Firth, 

 where it is not uncommon. I now record it for Loch Fyne, some 

 specimens having been obtained in a gathering of dredged material 

 collected near Otter Spit. Upper Loch Fyne, on January 12th, 1899. 



Jonesiella fusiformis (Brady and Robertson). 



1875. Zosime fusiformis, B. and R., Brit. Assoc. Rep., p. 196. 



This seems to be the most frequent representative of the genus in Loch 

 Fyne; in the Firth of Forth it is Jonesiella spinulosa., B. and R., that 

 is the more frequent species. Jonesiella fusiformis occurs not rarely in 

 material dredged on Tarbert Bank, Lower Loch Fyne ; it is collected here 

 in almost every dredging that is taken. The latest record I have of 

 Jonesiella fusiformis horn this locality is December 12th, 1899. 



Stenhelia blanchardi, T. and A. Scott. 



1895. Stenhelia blanchardi, T. and A. Scott, Ann. and Mag. 

 Nat. Hist. (6), vol. xvi. p. 353, PI. XV., tigs. 1-10. 



This distinct but apparently rare copepod was dredged off Arisaig, 

 Argyleshire, in 1892, though not described till 1895. No further 

 specimens were observed till the present year (1899), when the species was 

 again found; this time in some material dredged in the "Fluke Hole," 

 off St. Monans, Firth of Forth, in 1896, and the examination of which 

 had been delayed for want of time. This species is readily distinguished 

 from others of the same genus by the form of the secondary branches of 

 the fifth pair of thoracic feet, which terminate in hook-like processes. 

 The occurrence of the species in the Firth of Forth tends to indicate that, 

 though it seems to be rare, it may at the same time be widely distributed. 



Canthocamptus inconspicuus, sp. n. (PI. XIV., figs. 1-8.) 



Description of the Female. — In general appearance this species is 

 somewhat similar to Canthocamptus parvus, T. and A. Scott. The length 

 of the specimen figared measures from the forehead to the end of the 

 caudal furca 54mm. (about ^ of an inch). The antennules, as in the 

 species mentioned, are short and six-jointed ; the third joint is longer than 

 any of the others, being about equal to the entire length of the two 

 joints preceding as well as of the two that follow it. The formula shows 

 approximately the proportional lengths of the different joints — 

 Proportional lengths of the joints, 13 • 12 • 32 • 15 • 13 • 20 

 Number of the joints, 1 ' 2 • 3 "4 "5 -6. 



The antennae are each furnished with a one-jointed secondary branch. 

 The mandibles are small, and they are provided with a small one-branched 

 but moderately elongated palp (fig. 3). The first pair of thoracic feet 

 have both branches three-jointed ; the inner branches are considerably 

 longer than the outer, and the first joint exceeds in length that of the 

 second and third combined, as shown in the figure (fig. 5). The inner 

 branches of the second, third, and fourth pairs, which are shorter than the 

 outer branches, are only two-jointed, but the outer branches are three- 

 jointed, moderately elongated, and sparingly setiferous (fig. 6). The fifth 

 pair are small and foliaceous ; the basal joint is broadly sub-triangular, 

 while the secondary one is small and ovate ; both are provided with a few 

 setae, arranged as shown in the drawing (fig. 7). The caudal segments 

 are slender and about as long as the anal segment (fig. 8). The female 

 carries one ovisac. 



