. Elementary text-book of zoology [electronic resource]. Zoology. GAD us. 333 into which open three apertures. The anterior is the aims, the inter- mediate one the genital aperture, and the posterior is the icrinary aperture. If the skin be carefully dissected off one side there can be noticed fine superficial nerves supplying the lateral line and the fins. They arise mainly from the Vth and Xth cranial nerves. Below these the whole lateral wall of the body is formed of diagonal myomere Muscular, muscles, separated by connective-tissue niyoconiniata [cf. AniphioxKs). From a little way behind t
. Elementary text-book of zoology [electronic resource]. Zoology. GAD us. 333 into which open three apertures. The anterior is the aims, the inter- mediate one the genital aperture, and the posterior is the icrinary aperture. If the skin be carefully dissected off one side there can be noticed fine superficial nerves supplying the lateral line and the fins. They arise mainly from the Vth and Xth cranial nerves. Below these the whole lateral wall of the body is formed of diagonal myomere Muscular, muscles, separated by connective-tissue niyoconiniata [cf. AniphioxKs). From a little way behind the anus the rest of the body backwards, usually known as the tail is composed almost en- tirely of these myomere muscles. Their alternate contractions serve to move the "tail" and caudal fin and thus to propel the body. This method of locomotion is similar to that of Ainphioxus and is also found in many Elasjuobranchii though the skate itself has adopted a different method of progession by the pectoral fins which in the haddock merely act as balancing, steering and stopping organs. Fig. 235.—Dissection of Haddock from the Left Side. {Ad. na.) Liver. CcEca. The left abdominal wall has been cut and thrown back dorsally, and the intestine and stomach have been pulled out ventrally. The perivisceral cavity may now be opened up by a median ventral incision from chin to anus. The cavity is completely divided into two parts, the anterior fencardial cavity and the posterior abdominal cavity. The heart lies in the former and the alimentary canal and Alimentary, other organs in the latter. The somatic layer of perito- neum is deeply pigmented, forming a black wall to the cavity, whilst the splanchnic forms a glistening transparent membrane surrounding the alimentary canal and forming a dorsal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these il
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1901
