OCR Text |
Show MR. F. E. BEDDARD ON A NEW [Dec. 12, by a clear ring, and this again by a broader and opaque, white, halo. The male pores are very conspicuous upon the xviiitli segment, and, as in other species of Pontodrilus, tlie area upon which they open is depressed in a sucker-like fashion. Each depression is divided into two by a transverse raised fold. The actual pore seems to correspond in position to the outer of the ventral seta couple. Although the external characters are sufficient to define the present as a new species of Pontodrilus, in the existing state of knowledge of that genus it may be useful to give particulars of certain internal organs which are known to vary from species to species. Text-fig. 78. Text-fig. 79. Text-fig. 78.- Ventral view of Pontodrilus crosslandi, sp. n. Some of the segments are numbered 7, 8, 9, &c. Text-fig. 79.- Ventral view of Pontodrilus laccadivensis F. E. 15. Some of tlie segments are numbered 7, 8, &c. The gizzard is not at all prominent. The anterior intersegmental septa are as usual much thickened. The last of these thickened septa divides segments xiii./xiv.; but |