Geology and Mineralogy. 315 



species) restricted to Europe, and Irochiliscus (syn. Galcisphmra 

 in part and Moellerina), with 3 or more species, common to Russia 

 and North America. 



" Compared with known organic remains, the Trochilisks agree 

 best with the Characese and especially with the calcareous cover- 

 ing of the spore buds (oogonia). They can not, however, be 

 united with any living or extinct genus of Characeae, nor can they 

 be regarded as ancestral to living forms, but appear to represent 

 an extinct side branch of that old and peculiar group of plants 

 the Charophyta ; this completely isolated type of plants was differ- 

 entiated not later than Jurassic time" (pp. 87, 88). c. s. 



9. Echinoderma ; by Miss M. Grant. Zool. Record, xlii, 

 1905, January, 1907, 92 pp. — This very useful record of the 

 Echinoderma literature prepared in previous years by Dr. Bather 

 is here continued by Miss Grant. As the Zoological Recoi'd is to 

 be amalgamated with the International Catalogue, future lists will 

 be looked for in the last-named publication. The Echinoderma 

 literature here catalogued embraces 381 papers. c. s. 



10. Revision der Ostbcdtischen Silurischen Trilobiten • von Fe. 

 Schmidt. Mem. de l'Acad. Imp. Sci. de St. Petersburg, viii ser., 

 Vol. XIX, No. 10, November, 1906, 62 pp., 8 pis. — This part 

 closes Akademiker Schmidt's extensive revision of the East-Baltic 

 trilobites. The next and final number will give a summary of 

 the results attained, including corrections and additions. It will 

 appear toward the close of 1907. 



Here are described Megcdaspis and its 24 forms occurring in 

 the lower half of the Ordovician, 9 of which also occur in Sweden 

 or Norway. A pygidium of M. heros is figured, having a length 

 of 6 J inches, indicating an animal about 18 inches long. The 

 illustrations are good photographs of the specimens. c. s. 



11. A Contribution to the Genus Eusulina, with Notes on 

 a Fasidina-TAmestone from Korea / by H. Yabe. Jour. Coll. 

 Sci., Imperial Univ., Tokyo, Japan, 1906, 36 pp., 3 pis. — This 

 article in English treats of Fasidina, Schwagerina, Doliolina, 

 and JVeoschioagerina (new). Sumatrina Volz is regarded as a 

 synonym of the last-named genns, here defined as new. If this is 

 true, the matter will then stand the other way around, because of 

 the law of priority. Triticites Girty is regarded as a probable 

 synonym of Fasulina. 



There is also given a review of the known species of these 

 genera, with their distribution for all countries. c. s. 



12. Palaeontologia Universalis, Fasc. II, ser. ii, May 1906. — 

 This part contains sheets numbered 95-111, and gives the 

 original description and figures, with additional remarks and 

 illustrations by authors, of 17 species of Mollusca. 



There is also a complete index to the first one hundred sheets 

 of this publication. c. s. 



13. The Primary Septa of the Rngosa / by J. E. Duerden, 

 and The Primary Septal Plan of the Mugosa ; by R. G. 

 Carruthers. Ann. Mag. Nat. Hist., Sept. and Nov., 1906, pp. 



