. Lake Superior [microform] : its physical character, vegetation and animals, compared with those of other and similar regions . Natural history; Sciences naturelles. II iy. 'i- 242* LAKE SUPERIOR. very strong clav -i, (iis in Macronychurf) to fit it fur clinging lo stoi-es in a rapiil current. The inesojiectus of Eurypaljius is likewise iJeejily chaiuieled. The elytra are also furnislied with three or fuiii very obtiise elevated lines. As yet there is but a single species of the genus known. E. L'^contei, (Dej. Cat.) I am not aware that any description has been )»iblished of it. Thus is settl
. Lake Superior [microform] : its physical character, vegetation and animals, compared with those of other and similar regions . Natural history; Sciences naturelles. II iy. 'i- 242* LAKE SUPERIOR. very strong clav -i, (iis in Macronychurf) to fit it fur clinging lo stoi-es in a rapiil current. The inesojiectus of Eurypaljius is likewise iJeejily chaiuieled. The elytra are also furnislied with three or fuiii very obtiise elevated lines. As yet there is but a single species of the genus known. E. L'^contei, (Dej. Cat.) I am not aware that any description has been )»iblished of it. Thus is settleil the history of the transformations of an anomalous form, which lias much }ior]ilexed naturalists for many years. Its history shows the care with which our investigation should be made, when we are ujion unknown ground, l]ui where the lioinologies of the animal with other atpiatic larv;e provided with branchia are so exact, it is a little remai'kiible that its larval charactei* sliould remain so long unnoticed. The otifi/ iUff't'rence between it and an ordinary larva (either of (joleoptera or NeuropiiM'a) is the prolongation of the dorsal epidermis, to form a shiehl mider which the tr\ie body is concealed. Similar ])rolongations are found in nearly all orders of ins 'cts. I know not how Dr. Dekay fell into the mistake of considering the elongate )>al))i as a second pair of antennae : and surely such an anomalous form as a Crustacean with sir I'i/h, hi id a head separate from the thorax, deserved a nnjre careful csauiination, before receiv- ing a definite place in tiie system. Tlie figure in the Xew York Zodli^gv. (us the animal is very pecu- liar in its ronii.) beai's a ceriain vagiie rescnibhnice to what it was intended to represent ; bvit for all svsteniiuic (iur})0'^es. it is, like nearly all the plates in tiiat iiart of ':i{iaQ Survey. perfcelJy wort!\le»s. f i. Please note that these images are extracted from scanned page images that may have been digitally en
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectsciencesn
