Medusae of the world . Fig. »»m»«« (C/.i.«m<i) typicum, after Maas, in Hydromedusen Siboga sericeum, after Vanhoffen, in Tiefsee Expedition there are only 8 tentacles, one at the base of each radial-canal. The next to develop are 8adradial tentacles close by the sides of 4 alternate, radial tentacles Then 8 more adradialtentacles appear by the sides of the remaining 4 radial tentacles. Then 4 interradial tentaclesdevelop 90° apart, and finally 4 more interradial tentacles grow out in the the medusa goes through 5 stages as fo
Medusae of the world . Fig. »»m»«« (C/.i.«m<i) typicum, after Maas, in Hydromedusen Siboga sericeum, after Vanhoffen, in Tiefsee Expedition there are only 8 tentacles, one at the base of each radial-canal. The next to develop are 8adradial tentacles close by the sides of 4 alternate, radial tentacles Then 8 more adradialtentacles appear by the sides of the remaining 4 radial tentacles. Then 4 interradial tentaclesdevelop 90° apart, and finally 4 more interradial tentacles grow out in the the medusa goes through 5 stages as follows: 4 interradial= 32. This peculiar order of development of the tentacles has been observed by both Vanhoffen,Bieelow, and Maas. Lithocysts ( ? ) The velum and the circular muscles of the subumbrella are well-developed I here are8 short radial-canals and a narrow, simple ring-canal. The manubnum is one-third to three-fourths as long as bell-height and has 4 sharply-pointed lips. 8 narrow, spindle-shaped gona
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910
