. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ON THE APPENDICES GENITALES () IN THE SELACHIANS. 45 Tlie peculiar mixture of vShark-like and Ray-like characters that, as it is well known, is found in RIiiiKi, is accordingly increased by se\-eral features in the appendages of the male, whicli features by the ventral covering piece and the pocket, situated below it, with entrance from a side-slit, and partly also b\- the glandular bag, recall those in the Rays [Torprdo, Naninc^ Rliiiiobahis and Trygoii), while most of the other
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ON THE APPENDICES GENITALES () IN THE SELACHIANS. 45 Tlie peculiar mixture of vShark-like and Ray-like characters that, as it is well known, is found in RIiiiKi, is accordingly increased by se\-eral features in the appendages of the male, whicli features by the ventral covering piece and the pocket, situated below it, with entrance from a side-slit, and partly also b\- the glandular bag, recall those in the Rays [Torprdo, Naninc^ Rliiiiobahis and Trygoii), while most of the other features are those common in other Sharks. Cestvacionlidd'. Heterodontus (Cestracion) Phillipi ( The skeleton has been described by Gegenbaur'). Between the basale and the appen- dix are found two pieces (l>i, b, = y?, ^J', fig. 18, ig) that bear no rays; the piece /? is well developed (1. c. /' fig. 19). The chief piece of the appendix is provided with two (rather long?) marginal cartilages (the boundary lines of which cannot be seen in the figures of (iegenbaur, as he has not understood the marginal cartilages to be particular pieces), of which the ventral one has a dorsally l^ent plate ( fig. 19, ()â ); the stem is prolonged into a long style reaching almost to the end of the ter- minal part (1. c. fig. 19, 20, /). The number of terminal pieces is four: Td (^ 1. c. fig. 19, 20,0), Td^ (=1. c. «), which, as is often the case, is prox- imally prolonged into the appendix-slit; Tv (^ (â¢), as commonly, stronger and thicker than the others, and finally T. forming a short thorn. Gegenbaur has correctly seen the homologies of these pieces with those in Ac-<7/!l/i!t7S, where, however, he has not seen the piece Tt/, (^ u in Heterodontus). Of these terminal pieces the piece T", is said (1. c. S. 452) to be hard, while the others, though fully developed, are still Rn{a) Tuiej Fig. 15. Hctcyodoiiliis Phil/ipi. Tlie skeleton of the rig
Size: 862px × 2900px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksu, booksubjectarcticregions
