34 ANNALS OF SCOTTISH NATURAL HISTORY 



the only other Scottish locality known to us where Delavalia 

 palustris has been obtained. 



CANTHOCAMPTUS PALUSTRIS, Brady, "Mon. Brit Copep.," 

 ii. p. 53, Plate XXXIX. Figs. 13-23 (1880). This well- 

 marked species has, like the last, a very limited known 

 distrbution in Scotland ; but we believe that, in this case 

 also, it will be found to be more or less frequent when 

 carefully sought for in suitable situations. It has during 

 the last few years been obtained in one or two places in 

 the Firth of Forth, and we have now to record its occurrence 

 in brackish-water pools at the head and on the north side 

 of West Loch Tarbert, Argyleshire. 



CLETODES TENUIREMIS, T. Scott, " Eleventh Annual 

 Report of the Fishery Board for Scotland," part iii. p. 204, 

 Plate III. Figs. 21-28 (1893). This interesting and easily 

 distinguished species of Cletodes has not been observed 

 beyond the Forth area till last summer, when it was 

 obtained at West Loch Tarbert in brackish -water pools 

 along with CantJwcamptus palustris. 



PLATYCHELIPUS LITTORALIS, Brady, " Mon. Brit. Copep.," 

 ii. p. 103, Plate LXXIX. Figs. 15-19 (1880); T. Scott, 

 op. cit., p. 205, Plate V. Figs. 11-13 (1893). The known 

 distribution in Scotland of this curious species is, like that of 

 most of the others recorded here, hitherto very limited, and 

 so far as we know the present record of its occurrence in West 

 Loch Tarbert is the only record for the West Coast. It was 

 obtained in hand-net gatherings from brackish-water pools 

 along with Canthocamptus palustris and Cletodes tenuiremis. 



All the species recorded in the preceding notes have 

 hitherto been obtained only where there was an admixture 

 in greater or less proportions of sea and fresh water. These 

 brackish-water forms frequently exhibit a curious combina- 

 tion of characters interesting to the biologist, but often very 

 troublesome to the systematist. We believe that there is 

 still a rich harvest to be reaped by the study of these peculiar 

 intermediate conditions of habitat and life. It may well be 



said 



" The earth is full of Thy riches ; 

 So is this great and wide sea." 



