ANNALS OF SCOTTISH NATURAL HISTORY 34 
the only other Scottish locality known to us where Delavalia 
palustris has been obtained. 7 
CANTHOCAMPTUS PALUSTRIS, Brady, “Mon. Brit. Copep.,” 
ie 53, Plate OX KIX Figs: 13-23 (1880). This well- 
marked species has, like the last, a very limited known 
distribution 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, 7. 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 C/Zetodes 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 Canthocamptus palustris. 
PLATYCHELIPUS LITTORALIS, Brady, “ Mon. Brit. Copep.,” 
fe to3, Plate LXXIX. Figs. 15-19 (1880); 7. Scofz, 
wee, p. 205, Plate V. Bigs. 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 tenutremts. 
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.” 
