. The marine invertebrates and fishes of St. Andrews . Idotka, tricuspidata, Desmarest; B. & W. op. cit. ii. p. near low water in the laminarian region, and inthe stomachs of all the common fishes. Idotea linearis, Pennant; B. & W. op. cit. ii. p. in 3 or 4 fathoms on sand near the bar of theEden, in the trawlers boats, and in the stomachs of thecommon fishes. They are active swimmers. Messrs. Bate and Westwood state that I sent Cymodoceutruncata, Mont, from St. Andrews; but this is doubtful. Thespecimens probably came from the Outer Hebrides. 152 MAI
. The marine invertebrates and fishes of St. Andrews . Idotka, tricuspidata, Desmarest; B. & W. op. cit. ii. p. near low water in the laminarian region, and inthe stomachs of all the common fishes. Idotea linearis, Pennant; B. & W. op. cit. ii. p. in 3 or 4 fathoms on sand near the bar of theEden, in the trawlers boats, and in the stomachs of thecommon fishes. They are active swimmers. Messrs. Bate and Westwood state that I sent Cymodoceutruncata, Mont, from St. Andrews; but this is doubtful. Thespecimens probably came from the Outer Hebrides. 152 MAIMNE FAUNA OF ST. ANDREWS. Division AERISPIRANTIA. Fain. Oniscidse. Genus Lygia, Fab. Lygia oceaniea, L.; B. & W. op. nt. ii. p. 444. Abundant at the margin of high water at the East TJocks. A specimen of Porcellio scaber occurred in the stomach of ,> cod. Order C IM ace.*;. Fam. Diastylidae. Genus Diastylis, Raihkii, I\ off the East Hocks in 3 to 4 fathoms, and in thestomach of the cod, haddock, and CRUSTACEA. 153 Order Podophthalmata. The stalk-eyed Crustacea of St. Andrews are chiefly north-ern in type ; and though the species are not numerous, manyare very plentifully represented. The most important formshere, as elsewhere, are the edible crab and the lobster. Bothare caught in considerable numbers along the border of therocks by means of the ordinary crab-pots, which are generallybaited with fragments of grey gurnards and other fishes oflittle value. The most successful ground is off the EastRocks, though a very large lobster in the Museum of theUniversity was procured to the north of the West of the fishermen have an idea that if a lobster entersa trap first, none of the. edible crabs will venture beside it,whereas a lobster will invade the crab-pot though a dozen ofthe former are already there. Constant attacks seem to havediminished the numbers of both species, and especially of thelobster. 1 have never seen any of the
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