. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. 48 ON THE APPENDICES GENITALES (CLASPERS) IN THE SELACHIANS. Length from the foremost end of the slit to the extremity . 4omm — of the free part ijmm The greatest breadth ca. iomm The length of the terminal part 15™" In another specimen of the same length and a breadth of 19™ the appendages were a little shorter and broader, bnt otherwise as fully developed. The skeleton. Between the basale and the appendix- stem are found two pieces bz, 62, of which the former is the shorter one (seen dorsally it is much shorter), and
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. 48 ON THE APPENDICES GENITALES (CLASPERS) IN THE SELACHIANS. Length from the foremost end of the slit to the extremity . 4omm — of the free part ijmm The greatest breadth ca. iomm The length of the terminal part 15™" In another specimen of the same length and a breadth of 19™ the appendages were a little shorter and broader, bnt otherwise as fully developed. The skeleton. Between the basale and the appendix- stem are found two pieces bz, 62, of which the former is the shorter one (seen dorsally it is much shorter), and bears the two hindmost rays (the last but one is partly borne by the basale also). The piece jit is long, longer than b2, flat; proximally it articulates with bz, runs along b, without touching it, and arti- culates distally by an oblique articulation with the appendix-stem1)- The appendix-stem is rather straight, calcified in the sur- face until the terminal part, where the mosaic of the surface sud- denly ceases, and the outermost part of the stem is soft, which soft part, chiefly of the same breadth as the harder one, thus corresponds to the style, and reaches to the end of the terminal part, ending with a broadly rounded, convex edge. The marginal cartilages are both calcified, but very un- equally developed, by which the whole appendix gets a peculiar asymmetric appearance; the ventral one2) reaches a trifle longer forward than the dorsal one, but backward it ceases far before this latter; the dorsal cartilage is by a longitudinal furrow apparently divided into two pieces of which the lateral one begins forward about the middle of the ventral cartilage, and stretches backward about as far past the hinder end of this latter (see fig. 30, 31); this part of the dorsal marginal cartilage is on the ventral side hollowed in a trough- or groove-like manner; the medial part of this cartilage, especially the foremost part of it, is slightly calcified, membranous, and is place
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectscientificexpedition
