578 DR. R. VON LENDENFELD ON THE SysTEMATIC [Dec. 21 
1. Subordo Lyssacina, Zittel. 
The spicules remain isolated or are subsequently cemented 
together irregularly. 
i. Tribus Hewasterophora, F. E. Schulze. 
Hexaster always found in the mesogloea; chambers distinct, 
thimble-shaped. 
1. Familia EUPLECTELLID#, F. E. Schulze. 
Thin-walled tubes or sacs with sword-shaped hexact hypodermalia, 
the centripetal rays of which are the longest. 
1. Subfamilia Huplectelline, F. E. Schulze. 
Tubular, with terminal sieve-plates. The wall regularly perfo- 
rated. To the centrifugal ray of each hypodermal a floricome is 
attached. 
Euplectella, Owen, and Regadrella, O. Schmidt. 
2. Subfamilia Holascine, F. E. Schulze. 
Tubular, wall without perforations, without superficial flori- 
comes. 
Holascus and Malacosaccus of F. E, Schulze. 
3. Subfamilia Taegerine, F. EK. 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 AScoNnEMATID#, F. E. Schulze. 
Pentact or hexact pinnule in the dermal and gastral surfaces. 
Hypodermalia and hypogastralia pentact. Discohexaster in the 
interior. 
1. Subfamilia Asconematine, F. E. Schulze. 
Sessile, sac-shaped, or tubular, with thin soft wall. 
Asconema, Say. Kent, and Aulascus, F. E. Schulze. 
2. Subfamilia Sympagelline, O. Schmidt. 
Pedunculate, cup-shaped. Principalia hexact and diact. Disco- 
hexaster in the interior. 
Sympagella, O. Schmidt, Polyrhabdus, F. E. Schulze, and Bala- 
nites, F. E. Schulze. 
3. Subfamilia Caulophacine, F. E. Schulze. 
Mushroom-shaped, with long cylindrical hollow peduncle. 
Caulophacus and Trachycaulus of F. KE. Schulze. 
