776 Leuckart: Bericht üb. d. wissenschaftlichen Leistungen 



aranaceous covered passages, ramifying or forming a network over 

 the surface of shells and other bodies. Branches bifurcating, each 

 line ending in a neatly rounded aperture. Length indefinite. 



Äschemonella n. gen. Test free, consisting of one or more 

 chambres of irregulär size and shape. Chambers inflated, often with 

 more than two tubulated apertures, any of which may produce a 

 fresh segment. Walls thin, compactly built; exterior slightly rough, 

 sometimes acerose with partially imbedded sponge-spicules. Segments 

 variable in size. 



Thurammina n. gen. Test free or adherent; either consi- 

 sting of a Single rounded Chamber, sometimes enveloping a similar 

 one of smaller size, or of two or more (apparently) independent 

 Chambers adhering to each other. Texture thin; arenaceous or 

 chitino-aranaceous. Surface beset with numerous perforate ripple- 

 shaped protuberances. 



Placopsilina d'Orbigny. Test adherent; composed of a 

 Single convex, tent-like Chamber, or of many such segments variously 

 corabined. Polythalamous forms spiral, crozier-shaped, acervuline 

 or linear in contour. Texture more or less roughly aranaceous. 



Reophax de Montf. Test free, uniserial; consisting of a 

 Single flask-like Chamber, or of a number of segments joined end 

 to end in a straight curved or irregulär line. Texture aranaceous, 

 more or lesa rough externally; chamber-cavities simple, not labyrin- 

 thic, Aperture terminal, simple. 



Die zwei letztgenannten Genera gehören zu der Familie der 

 Lituolideen (exterior more or less roughly aranaceous; septation 

 of the polythalamous forms rudimentary or imperfect), deren Formen 

 Verf. in folgender Uebersicht zusammenstellt. 



A. Not labyrinthic. 



a. Adherent by its flat surface . Placopsilina d'Orb. 



b. Adherent columnar, attached at 



one end Haliphysema Bow. (?) 



c. Free, uniserial, moniliform, never 



Spiral Reoplax Montf. 



d. Free, partially or entirely spiral, 



nautiloid or crozier-shaped . . Haplophragmium Reuss. 



B. Chamber-cavities subdivided or labyrinthic. 



a. Adherent by its flat surface . Bdelloidina Carter. 



b. Adherent subcylindrical, colum- 

 nar, attached at one end . . Polyphragma Reuss (?). 



c. Free, uniserial, straight or arcuate, 



never spiral Haplosticha Reuss. 



d. Free, partially or entirely spiral, 



nautiloid or crozier-shaped . . Lituola Lam. 



