Marine biological report for the year ended ..and the half year ending .. . setae, the otherappendages becoming suddenly relatively elongated,and the outer branch of the walking legs develop-ing swimming setae. 3. The puerulus, in which the antennules are relatively smaller the antennae large and uniramous. Thepleopods are biramous and act as swimming are only a few spines on the carapace. 4. The calcareous stage, in which deposits of carbonate of lime appear in the cuticle. The pleopods becomereduced, and lose their swimming functions. The complete life history of the Cape crawfi
Marine biological report for the year ended ..and the half year ending .. . setae, the otherappendages becoming suddenly relatively elongated,and the outer branch of the walking legs develop-ing swimming setae. 3. The puerulus, in which the antennules are relatively smaller the antennae large and uniramous. Thepleopods are biramous and act as swimming are only a few spines on the carapace. 4. The calcareous stage, in which deposits of carbonate of lime appear in the cuticle. The pleopods becomereduced, and lose their swimming functions. The complete life history of the Cape crawfish is not, how-ever, yet known, there being several gaps in the series ofspecimens procured. Thus, no stages have been found betweenthe phyllosoma of 3 -8 mm. in length and those of 24 this the series is fairly complete up to 37 mm. The largest gap, however, is between the oldest phyllosomaand the puerulus. Whether or not the puerulus with itsmuch-shortened body and legs, its curved shield, etc., at asingle moult assumes these characteristics, is as yet /~\ cS g o C/5 v> O a, >— rt >*. r-* S} CU o ^^^ -4-» o <a J2 ?01) Q. rt (-< CAJ a •c o O fc o <u , CO C/3 OJ u x; .n rt-G ^_/ u .5 c-hi u « 5 4J 4J -55 •• 3 — ? 03 tn O (L) p rt ri 1 75 IV.—DESTRUCTION OF FISH AND FISH SPAWN BYNETTING IN THE BERG RIVER AND AT KNYSNA. A. Berg River. The question of the alleged destruction of young fish andfish eggs in the Berg Ri^er has recently become an importantone in the fishing industry of that locality, and has called fora good deal of investigation and enquiry on the part of theAdministration. The statements of the interested parties havebeen so varied and contradictory that independent evidencehas been necessary. An enquiry by the Magistrates of thedistricts directly concerned was held, and a good deal ofinformation was obtained from the various witnesses independent investigation of the alleged facts of the casewas also made
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Keywords: ., bookcentury1900, bookdecade1910, bookidmarinebiolog, bookyear1913
