. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. SEA MUSSEL MYTILUS EDULIS. 171 nective continues backward and around the anterior retractor muscle to its dorsal wall and terminates in the pedal ganglion (fig. 159, CPC). The cerebrovisceral connective at the point of bifurcation with the cerebropedal connective turns upward and con- tinues in a posterior direction across the lateral surfaces of the posterior retractor muscles to its point of termination in the visceral ganglion (fig. 159, CVC). Along its course several delicate nerve b
. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. SEA MUSSEL MYTILUS EDULIS. 171 nective continues backward and around the anterior retractor muscle to its dorsal wall and terminates in the pedal ganglion (fig. 159, CPC). The cerebrovisceral connective at the point of bifurcation with the cerebropedal connective turns upward and con- tinues in a posterior direction across the lateral surfaces of the posterior retractor muscles to its point of termination in the visceral ganglion (fig. 159, CVC). Along its course several delicate nerve branches are given off which go to the liver, intestines, genital glands, and kidney. Of these the last branch forward, the anterior renal nerve (fig. 163, ARN, p. 175) is the most prominent. The otocyst nerve is a very fine fiber that arises from the cerebropedal connective at its junction with the cerebrovisceral connective and continues a short distance backward to the otocyst (fig. 163, OtN). DRBN CVC DPN PPN \ I PPdN •. BAPN APN CPC PdG\ vhbn PdN PRB 159 Mes YG BrN Fig. 159.—Ventrolateral view of the nervous system in a transparent total preparation of a mussel mm. long, separated from the shell, mantle and gills removed from one side, and a portion of foot cut ofT. Fixed in strong Fleniming fluid, exposed in 70 per cent alcohol to strong sunlight, dehydrated in alcohol and cleared in benzol and wintergreen oil. X 15. A PN, anterior pallial nerve; BAPN, branch of anterior pallial nerve; BrN, branchial nerve, BuN, buccal nerve; CC, cerebral commissure; CG, cerebral ganglion; CPC, cerebropedal commissure; CVC, cerebrovisceral commissure; DPN, dorsal pallial nerve; DRBN, dorsal retractor byssus nerve; L, liver; Mes, mesosoma; Mih, mouth; PdC, pedal ganglion; PdN, pedal nerve; PDPN, posterior dorsal pallial nerve; PPdN, posterior pedal nerve; PPN, posterior pallial nerve; PRB, posterior retractor muscle of byssus; PVPN, posterior ventral pallial nerve; syphonal ne
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