326 Revieivs — Dr.Riid on Fossil Radiolaria. 



tlie genus Bittium, Gray, is said to be represented by Cerilh'nm 

 granuliferum; v. Koenen. Why not call the mollusc Bittium grmiu- 

 liferuml The name Lovenella, Sars, 1878, should be replaced by 

 Cerifhiella, Verrill, 1882, the first-mentioned being pre-occupied 

 by Lovenella, Hincks, 18G8. The other genera of the CerithidEe 

 mentioned by the author are Triforis, Aporrhnis, and Mesostoma, 

 though why the two last mentioned are so grouped we are at a 

 loss to understand. Aporrhais does not in any way resemble any 

 member of the Cerithidaj with which we are acquainted, and it is 

 usually placed in the vicinity of the Strombidee, near Eimella and 

 Rostellaria — by some authors it is included in the Alata. The name 

 Mesostoma, Deshayes, 1861, is occupied by Ant. Dujes, 1830, and 

 even if it were not, its true name by priority should be Cerithio- 

 derma, Conrad, 1860. Moreover, it is now usually classed with the 

 Trichotropidfe. 



Of the Turritellidse, Prof, von Koenen recognizes the genera 

 Tarritella, Mathilda, Scaliola, Vermetus, and Siliquaria. He includes 

 the ScalaridcG as a sub-family of the Turritellidas ! Cirsotrema and 

 Acrilla are mentioned as sub-genera, though of what genus, or 

 genera, the author does not very clearly show. The name Scalaria, 

 Lamarck, 1801, is used instead of Scala, Humphrey, 1797 ; the 

 latter has been preferred for some time in America, and adopted in 

 recent works in this country. Grassiscala, Clathroscala, and Aci^-sa 

 occur, and together with the sub-genus Acirsella complete the list. 

 The inclusion of the Scalaridfe (or rather Scalidae, as they should be 

 termed) amongst the Turritellidje is much to be regretted in face of 

 the writings of M. de Boury and others, on the systematic position 

 of the group. 



In spite of these shortcomings, however, the work will be 

 welcomed by all malacologists and geologists who desire to become 

 more perfectly acquainted with the fauna with which it deals. The 

 large number of new specific forms described, and the careful 

 manner in which they have been diagnosed and illustrated, are 

 features the value of which must not be overlooked. G. F. H. 



III. — Beitrage zuh Kenntniss der fossilen Eadiolarien aus 

 Gesteinen dkr Trias und Pal^ozoisciien Schichten. Von Dr. 

 Rust in Hanover. Paleeontographica, Bd. XXXVIII, 3-6 

 Lieferung, Marz, 1892 ; pp. 107-192. Mit. Taf. VI.-XXX. 



Contributions to the Knowledge of Fossil Radiolaria from 

 THE Triassic Rocks and from Palaeozoic Strata. By Dr. Rust. 



DR. RUST'S researches on the Radiolaria in the Lower Mesozoic 

 and the Palaeozoic strata have proved as fruitful as those which 

 he has pi'eviously made on this group in the Cretaceous and Jurassic 

 rocks. In this memoir no fewer than 247 species of Radiolaria 

 from the Palaeozoic, and 20 species from the Triassic rocks, are 

 described ; a remarkable result when it is considered that np to two 

 years since these organisms were scarcely at all known in Palceozoic 



