On the Occurrence and Habits of the Siphonophore, Stephanomia bijuga (Delle Chiaje)

According to E. T. Browne, 1899, Stephanomia bijuga (Delle Chiaje) (syn. Cupulita sarsii Haeckel and Agalmopsis elegans Sars, partim) belongs to the surface Atlantic fauna. It has been recorded at Valencia from March to November, and while suffering badly from the destructive power of gales it must occur at times in enormous numbers, for in November, 1898, tow-nets were taken that were full of isolated pneumato-phores. Into the more confined waters of the English Channel, however, it penetrates apparently very rarely, the only record being that of a single specimen taken a mile or two out from Plymouth Sound in March, 1902.