© Magor dissection – Cranial netre of
scaliodon comments
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Answer:
OK 1. Introduction to Scoliodon:
The class Elasmobranchii embraces a large variety of cartilaginous fishes. To give a general idea of the class, the common example of the group, the dogfish, is selected as an introductory type.
There are several genera of dogfishes available in the different parts of the earth. The typical Indian genus, Scoliodon is described below. The genus is represented by about nine species, of which four are very common in the Indian seas.
The genus Scoliodon is distinguished from other dogfishes by having an elongated snout, depressed head and a compressed body. The teeth are similar in both the jaws. The caudal pit and the sub-caudal lobe are prominent and distinct. The four Indian species of Scoliodon are: Scoliodon sorrakowah, S. dumerilii, S. palasorrah and S. walbeehmi.
Explanation:
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Answer:Dissection of Cranial Nerves: Remove the skin from the dorsal surface of the head to expose the cranium. The cranium or brain box of dog fish is cartilaginous. The dorsal and lateral sides of the cranium can be removed either by scraping it or cutting off in small bits with a sharp scalpel.