The book The Structure of the Pharyngeal Bars of Amphioxus was written by author William Blaxland Shoppee Benham Here you can read free online of The Structure of the Pharyngeal Bars of Amphioxus book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Structure of the Pharyngeal Bars of Amphioxus a good or bad book?
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The usual subepidermic blood-vessel (skel. V. ) is also present. But this bar, if traced upwards towards the epibranchial groove and downwards towards the endostyle, presents variations of this condition in different regions. At its origin dorsally the three rods are fused together, but this occurs for only a very short space, and we soon tind three rods. Towards its lower end two of these (Nos. 1 and 3) are fused, so that the bar has but two rods ; and still further a junction between these tw...o is effected (fig. 28), and there appear to be but one rod, rather larger than usual, but evidently consisting of two united rods. Soon, however, these separate again, and I take this union as representing a synapticulum. But now the relative position of the two rods changes ; 2 18 W. BLAXLAND BENHAM. hitherto they have been side by side, or rather anterior and posterior ; but now (fig. 29) one (No. 2) lies outside the other (Nos. 1 and 3), which occupies the normal position. I was unable to track the rods quite to their junction with the floor of the pharynx owing to the imperfection of some of the sec- tions in this series.
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