OCR Text |
Show 828 MR. E. T. BROWNE ON BRITISH MEDUS.E. [NpV. 16, branches of the canals leave the main canal between the generative organs and the stomach (see fig. 12, p. 828). Fig. 12. Dipleurosoma hemisphcericum. Diagram showing the position of the gonad upon the radial canal. It is evident that these specimens do not agree with Allman's description of the species. H e clearly states that there are only three primary canals, which give off branches, and that the generative cells are confined to these canals and are situated close to the stomach. I think a fresh description of this species is required, and that a large number of specimens ought to be examined, so as to find out the normal plan of the canal-system and the extent of its variations. DISTRIBUTION. England-Brighton, Haeckel. Ireland-South Coast, Allman. Kingstown, Haddon. Valencia Island, E. T. B. POLTCANNA FORSKALEA (Forbes). jEquorea forskalea, Forbes, P. Z. S. 1851, p. 272, Bad. pl. iv. O n the 5th September, 1896, five specimens of this beautiful medusa were captured in Valencia Harbour, and others were seen swimming at too great a depth to be taken in a hand-net. On the previous day a large one had been taken by the Misses Delap. All the specimens were in splendid condition, aud fortunately belonged to different stages, which are described in the order of their size |