| OCR Text |
Show 578 DR. R, V ON LENDENFELD O N THE SYSTEMATIC [Dec. 21 i. Subordo LYSSACINA, Zittel. The spicules remain isolated or are subsequently cemented together irregularly. i. Tribus He xasterophora, F.E. Schulze. Hexaster always found in the mesogloea; chambers distinct, thimble-shaped. 1. Familia EUPLECTELLID^E, F. E. Schulze. Thin-walled tubes or sacs with sword-shaped hexact hypodermalia, the centripetal rays of which are the longest. 1. Subfamilia Euplectellince, F. E. Schulze. Tubular, with terminal sieve-plates. The wall regularly perforated. To the centrifugal ray of each hypodermal a floricome is attached. Euplectella, Owen, and Regadrella, O. Schmidt. 2. Subfamilia Holascinm, F. E. Schulze. Tubular, wall without perforations, without superficial flori-comes. Holascus and Malacosaccus of F. E. Schulze. 3. Subfamilia Taegerince, F. E. Schulze. Tubular or sac-shaped, wall irregularly perforated. Principalia partially cemented, forming an irregular network. To the distal ray of each hypodermal sword-shaped hexact a floricome is attached. Taegeria and Walteria of F. E. Schulze. 2. Familia ASCONEMATID^E, F. E. Schulze. Pentact or hexact pinnulae in the dermal and gastral surfaces. Hypodermalia and hypogastralia pentact. Discohexaster in the interior. 1. Subfamilia Asconematina, F. E. Schulze. Sessile, sac-shaped, or tubular, with thin soft wall. Asconema, Sav. Kent, and Aulascus, F. E. Schulze. 2. Subfamilia Sympagellince, O. Schmidt. Pedunculate, cup-shaped. Principalia hexact and diact. Discohexaster in the interior. Sympayella, O. Schmidt, Polyrhabdus, F. E. Schulze, and Balanites, F. E. Schulze. 3. Subfamilia Caulophacince, F. E. Schulze. Mushroom-shaped, with long cylindrical hollow peduncle. Caulophacus and Trachycaulus of F. E. Schulze. |
