FIGURE 23. a in On a collection of hydroids (Cnidaria, Hydrozoa) from the southwest coast of Florida, USA

FIGURE 23. a, Halopteris alternata: part of a hydrocaulus with proximal end of a hydrocladium, Fort Myers Beach, ROMIZ B4400. Scale equals 0.1 mm. b, Halopteris alternata: part of a hydrocladium with two hydrothecae, Fort Myers Beach, ROMIZ B4400. Scale equals 0.1 mm. c, Halopteris alternata: part of hydrocaulus of an "Antennella form" with a developing hydrocladium, Fort Myers Beach, ROMIZ B4400. Scale equals 0.1 mm. d, Halopteris clarkei: part of hydrocaulus with proximal ends of two hydrocladia, Southwest Florida Shelf, ROMIZ B2097. Scale equals 0.1 mm. e, Halopteris clarkei: hydrocladial hydrotheca and nematothecae, Southwest Florida Shelf, ROMIZ B2097. Scale equals 0.1 mm. f, Halopteris clarkei: male gonotheca with a nematotheca, Southwest Florida Shelf, ROMIZ B2097. Scale equals 0.05 mm. g, Monostaechas quadridens: part of colony with a hydrotheca and nematothecae, Southwest Florida Shelf, ROMIZ B2100. Scale equals 0.1 mm. h, Ventromma halecioides: part of hydrocaulus with a hydrocladium, Sanibel Island, ROMIZ B4395. Scale equals 0.2 mm. i, Ventromma halecioides: part of hydrocaulus with proximal end of a hydrocladium, Sanibel Island, ROMIZ B4395. Scale equals 0.1 mm.