Abstract
The Quarterly Journal of Microscopical Science, February, 1888, contains:—On the Photospheria of Nycliphanes norvegica, G. O. Sars, by Rupert Vallentin and J. T. Cunningham (Plate 23). The authors give an account of their examination of the luminous organs of this little crustacean; it is a distinctly northern form, being absent from the Mediterranean and the warmer parts of the Atlantic. It is abundant on the west coast of Norway; the adults seem to live on the bottom and never swim far from the ground, while the young, up to half or three-quarters the size of the adult, occur abundantly at the very surface, and at all intermediate depths. Mr. Murray found swarms in the Faroe Channel, and it seems common in the the Clyde sea-area; the authors took it in abundance off Brodick Bay. The histological details of the luminous organs are given in detail, and agree for the most part with those of G. C. Sars.—On the early stages of the development of a South American species of Peripatus, by W. L. Sclater (Plate 24). These details are worked out from a species found by Mr. Sclater in Demerara, and called by him P. imthurni; the early stages present great differences when compared with those described by M. Sedgwick in P. capensis.—On the anatomy of Allurus tetraëdrus (Eisen), by Frank E. Beddard (Plate 25). The specimen described came from Teneriffe; there are several structural differences between this genus and Allolobophora.—On the development of the Cape species of Peripatus; Part iv. the changes from the G stage to birth, by Adam Sedgwick, F.R.S. (Plates 26–29).—On the occurrence of numerous Nephridia in the same segment of certain earthworms, and on the relationship between the excretory system in the Annelida and in the Platyhelminths, by Frank E. Beddard (Plates 30 and 31).—On the anatomy of the Madreporia, iv., by Dr. G. Herbert Fowler (Plates 32 and 33). The author gives the result of his investigations of the species of seven more genera of the Madrepores, which, among other important results, seem to establish a relationship between the external body-wall and the corallum, which depending on the presence or absence of cœnenchyma may yield a distinctive morphological character. In all those genera in which a cœnenchyma is found, whether they belong to the Perforata or Imperforata, the body-wall rests on the little spikes or echinulations which stud the surface of the corallum. A new species of Seriatopora is described as S. tenuicornis; it was found by Dr. S. J. Hickson at the Celebes; it comes near S. caliendrum.
Article PDF
Rights and permissions
About this article
Cite this article
Scientific Serials . Nature 37, 572–573 (1888). https://doi.org/10.1038/037572b0
Issue Date:
DOI: https://doi.org/10.1038/037572b0