ELEID.E. 
28 ^ 
Family ELEID^. 
Sl'XOXYilS. 
SaJpingbm, von Hagenow, 1851. 
Eleidce, d’Orbigny, 1853 ; Marsson, 1887. 
Ceidte, d’Orbigny, 1854. 
Eiastoporidea , pars, Xovak, 1877. 
Entalophoridea, pars, Xovak, 1877. 
Entalophoridce, pars, von Zittel, 1880. 
Stigmatoporina, pars, Hamm, 1881. 
Ceina, Pergens, 1890. 
Melicertltidce, Pergens, 1890. 
Diagnosis. 
Cyclostomata Tiibiilata in which the apertures are lateral and 
snbterminal, and which frequently have avicidaria and spines. 
The marsupial chambers are gonocysts or gonoecia. Many of 
the zooecia may be closed by thin, calcareous films. 
The Synonyms of the Eleidh:. 
The group of Eleidse was founded by d’Orbigny ^ in 1853 as 
a family of his order, the ‘ Centrifugines,’ characterized by the 
possession of veiy long, capillary, oblique, centrifugal tubes. The 
order, therefore, coiTesponds with Busk’s Cyclostomata. Two years 
before the foundation of d’Orbigny’s family, von Hagenow had 
established a special subdivision of Biyozoa, the Salpingina, for 
the only two Eleid genera, Escharites and Invermria^ which ho 
accepted. The characters assigned to the Salpingina were long 
tubular zooecia with trumpet-shaped distal expansions, closure by^ 
a calcareous or chitinous membrane which is perforated b}" an 
aperture, and probably always the presence of an operculum 
{Klappe). 
Hamm, in 1881, founded a ‘ typus Stigmatoporina,’ as a section 
of the Cyclostomata Inarticulata, for those genera with a central 
axial bundle of long, parallel, cylindrical zooecia surrounded by- 
one or more zones of lateral ‘ Zellen.’ He included in this group 
Cyrtopora^ Stigmatopora (i.e. Hammia), and Meliceritites, but this 
is an artificial association. It is based on an imperfect appreciation 
* Bry. Cret. p. 585. 
