. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Rotifera of the Family Asplanchnidtfi, 31 Lastly, the following is the description of a species which has been communicated to me by M. Jules Richard, and which I cannot refer to any known form. Asplanchna Girodi, sp. n. (Fig. 4.) Diagnosis.—Femina. Corpus globosum ; maxillte duobus tantum ramis compositoe, elongatae, validoe; rami apice bidentati, dentc uno curvato, subobtuso, altero compresso, lamelloso. Mas ignotus. Long. 0-85, lat. 0-o5 mill. This Asplanchna, which must ce
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Rotifera of the Family Asplanchnidtfi, 31 Lastly, the following is the description of a species which has been communicated to me by M. Jules Richard, and which I cannot refer to any known form. Asplanchna Girodi, sp. n. (Fig. 4.) Diagnosis.—Femina. Corpus globosum ; maxillte duobus tantum ramis compositoe, elongatae, validoe; rami apice bidentati, dentc uno curvato, subobtuso, altero compresso, lamelloso. Mas ignotus. Long. 0-85, lat. 0-o5 mill. This Asplanchna, which must certainly attain a length of 1 millim. (the above measurements are taken from specimens contracted in alcohol), is distinguished among all its congeners by the lamellar T'ig. 4, tooth of its masticatory apparatus (fig- 4). ^ Locality. Found first of all in small quantities by M. J. Eichard in the neighbourhood of Vichy (Allier) in the pond of Cognet, on IGtli September, 1886, this Rotifer has since been col- lected by the same zoologist in Lake Chambon (Puy-de-Dome) at an eleva- tion of 880 metres, on 15th August, 1887. I proposed at first to dedicate this species to the young and zealous ,, . naturalist who discovered it; but M. ^^'"ffwJ ''^^'}^ «f iticharcl, by a sentiment which does him 500. honour, has begged me to attach to it the name of Dr. Girod, Professor in the Faculty of Sciences of Clermont, under whose guidance his first work was per- formed *.. In the following table I have summarized, in an artificial manner (\vhich, however, I have endeavoured to render clear and practical), the principal characters of the known species of the genus Asplanchna. It seemed to me that the distinctions should as far as possible be derived from the masticatory * It is to the initiatiou of Dr. Girod that we owe the investigations at present in progress upon the fauna of the Auvergne, investigations in the course of which M. J. Richard has not only met with the Asplanchna abo
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