BIBLIOGRAPHY. 25 
134. 1876 Kayser, EH. Beitrige zur Geologie und Palacontologie der argentin- 
ischen Republik (Palewontographica, Lief. iti, p. 22). 
Refers generally to the fossil Sponges met with, and figures a small form, 
subsequently named by Zittel Protachilleum Kayseri. 
155. 1876 Marox, v. der. Neue Beitriige zur Kenntniss der fossilen Fische und 
andern Thierreste aus der jungsten Kreide Westfalens (Paleonto- 
graphica, Bd. xxi, p. 68, Pl. ii, fig. 10). 
Describes as a new genus of Sponges, Glenodictyum, a fibrous body growing 
in the form of a hexagonal mesh-work. The minute structure cannot be 
recognised and the character of the fossil is very problematical. 
136. 1876 Sortas, W. J. On Hubrechus clausus, a vitreo-hexactinellid Sponge 
from the Cambridge Coprolite Bed (Geol. Mag., pp. 398—403, 
Plh Xa): 
Describes the form and compares its external structure with that of the 
existing genus Farrea, but the fossil Sponge is stated to possess an interior 
skeleton as well as an outer membrane. 
137. 1876 Zirren, K. A. Ueber Coeloptychium. Lin Beitrag zur Kenntniss der 
Organisation fossiler Spongien (Abh. der k. bayer. Akad. der Wiss., 
II Cl., xu Bd., ii Ab., pp. 1—80, Pls. I—VII). 
An elaborate monograph on the general structure, the canal-system, and 
skeletal mesh of the Sponges of this genus. The nodes of the spicules are 
compared with those of the living genus Myliusia. The body of the Sponge 
is Shown to consist of thin walls of spicular tissue disposed in radiating folds, 
which are enclosed in a cribriform dermal layer. Numerous detached spicules 
in the interior of these Sponges are erroneously regarded as belonging to their 
skeletal structures, but Zittell subsequently pointed out that their presence 
was accidental. 
138. 1876 Armsrronc, Younc, and Ropertson. Catalogue of the Western Scottish 
Fossils. 
From the Upper Girvan series Ischadites Keenigii is recorded, and Hyalo- 
nema parallelum and Acanthospongia Smithii from the Carboniferous of 
Ayrshire. 
139. 1877 Cartur, H. J. Note on the Tubulations sableuses of the Etage Brux- 
ellien in the environs of Brussels (Ann. and Mag. Nat. Hist., 8. 4 
vol. xix, pp. 882—393, Pl. 18). 
The forms described by Rutot as Sponges are regarded by Carter as the 
tubes of a new type of Annelids. The siliceous spicules associated with them 
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