. The Bashford Dean memorial volume :. Fishes; Sharks; Fishes, Fossil. 544 Bashford Dean Meynorial Volume (with their 10 eggs, each measuring 80-83 mm. in diameter) sketched in. This is re- produced herein as Text'figure 9. Being labelled, it needs no explanation here beyond the remark that the non^gravid uteri are of approximately the same si2, Text-figure 9 Semi-diagrammatic sketch to show the repro- ductive organs of a 1510-mm. female Chlamydosel- achus. Note the five huge eggs (80—83 mm.) in each ovary, and the paired oviducts with their subdivisions. One shell gland is opened to show i
. The Bashford Dean memorial volume :. Fishes; Sharks; Fishes, Fossil. 544 Bashford Dean Meynorial Volume (with their 10 eggs, each measuring 80-83 mm. in diameter) sketched in. This is re- produced herein as Text'figure 9. Being labelled, it needs no explanation here beyond the remark that the non^gravid uteri are of approximately the same si2, Text-figure 9 Semi-diagrammatic sketch to show the repro- ductive organs of a 1510-mm. female Chlamydosel- achus. Note the five huge eggs (80—83 mm.) in each ovary, and the paired oviducts with their subdivisions. One shell gland is opened to show its structure, and both uteri are somewhat dilated. Sketch by courtesy of F. Momose. THE OVARIES In Chlamydoselachus, the ovaries are paired, elongate, and in the non-breeding female, more or less flattened organs situated in the anterior part of the body cavity and attached, rather indirectly, to the dorsal body wall by means of broad mesenteries. These organs like others in this fish are subject to some interesting variations which will be pointed out further on. Before Smith's studies (1937), but three in- vestigators had published observations on the ovaries of Chlamydoselachus. Garman (1885) merely remarks—''The ovaries [Text-figure 8] had been badly preserved and were much torn". CoUett (1897) describes the oviducts and then continues as follows: "The right uterus [ovary?] was 240 mm. in length, and contained 10 large eggs about the size of the yolk of a small hen's egg, but some varied in size. There were, besides, about 30 lesser yolks of the size of large and small peas, as well as a few bigger ones about the size of the yolk of a pigeon's egg. The length of the left uterus [ovary] was 220 mm., and it contained five large yolks, and about 20 small ; This is understandable only on the sup- position that Collett used the word "uterus" but meant ovary. In the paragraph preceding the one quoted, he crudely described the oviducts—stating t
Size: 1141px × 2191px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, booksubjectfishes, booksubjectfishesfossil
