Miscellaneous. 465 depression or aperture formed by the turning-in of the wall towards the interior ; this depression becomes a second vesicle, within the former. It is at the bottom of this second vesicle that the scolex sprouts forth. The latter increases in length until it can no longer find room within the vesicle, when it issues out through the aperture. It then exhibits a division into segments. The embryonal vesicle contains in its walls a great number of cal-careous concretions. The authors found that Claparede was quite right in supposing that the same relations would be found to exist between the calcareous corpuscles and the vascular system of the Cestoid Worms that he observed in the corresponding organs of the Trematoda. These corpuscles are, in fact, lodged in inflated portions of the finest branches of the vessels. The authors appear to think, moreover, that there exist two vascular systems opening into the same principal trunks ; one of these being in relation with the cal-careous corpuscles, while the other has nothing to do with them. The segments of the Echinobothrium separate from each other at a period when the semen is not yet formed, which leads to the sup-position that the proglottis-phase is of rather long duration. The cystic form of the worm lives, as indicated by Van Beneden, in the Prawns. Development of Spio. The authors describe nearly the whole series of metamorphoses of a larva, belonging undoubtedly to the genus Spio. Some isolated stages of these metamorphoses have been observed by Busch and Loven, and perhaps also by Slabber and Oersted. In its young state the larva has a somewhat elongated body, furnished with two bands of cilia, one placed about the middle, the other towards the posterior extremit3\ Subsequently the anterior portion is deve-loped, so as to form two ciliated cephalic lobes, between which the mouth is situated ; two bundles of setae make their appearance, and the segments of the body begin to be indicated. Soon after-wards the eyes appear, each segment acquires its bundles of setae, and the larva gradually approaches the form of the perfect animal. — ArcJiiv fur Anat. und Physiol. 1858, p. 558 ; Bibl. de Geneve^ 1859, p. 73. On a new genus of Goat-sucker^ and on a new species of Enicurus, both from Barjeeling, from the Collection of Brian H. Hodgson, Esq. By George R. Gray, F.L.S. Otothrix, G. R. Gray, gen. nov. This bird differs from the Indian Batrachostomi in the smallness of its bill, and in the general markings of its plumage, which agree in some measure with the species of true Podargus. The feathers over the upper mandible in front of the head and above the ears are much prolonged into fine hair-like bristles ; they are composed of a long slender stem, having very slender branches springing from the sides at various distances, and thus agreeing Ann. ^ May. N. Hist. Ser. 3. Vol. iv. 30
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