136 Reviews — Nicholson and Etheridge — Fossils of Girvan District. 



Gray, Esq., F.E.S.E., most liberally gave further means for the 

 purpose. Mrs. Eobert Gray's collection of the Girvan fossils is the 

 most complete extant, and has been carefully studied. The authors, 

 Mr. Lapworth, and the Geological Surveyors, have also had fossils 

 collected for examination. 



The first part of the proposed Monograph is handsomely produced, 

 with good printing and paper, and with nine excellent plates, 

 lithographed by C. Berjeau, F.L.S. 



Among the Protozoa (and at page 10, among the Rliizopoda) are 

 enumerated the obscure Nididites and Ischadites, the better known 

 Saccammina of H. B. Brady, and the less determinate Girvanella of 

 N. and Eth. The remarks on the possible affinities of the first two 

 are painstaking, and, though inconclusive, are useful in view of 

 further inquiries. The Silurian age of Saccammina, a real Bhizopod, 

 known also in both Carboniferous Limestone and recent seas, is 

 very interesting ; but not so wonderful as it would be did we not 

 know of the persistency of low organic existences. Principal 

 Dawson has enumerated several Silurian and pre-Silurian Bhizopods. 

 The Bev. J. F. Blake has noted a Lower- Silurian Dentalina l at 

 Aberystwyth; and the Eozobn is still unaccounted for by some 

 mineralogists, and accepted by most Bhizopodists. The Girvanella, 

 though obscure, has its analogues in Chalk flints, and in recent 

 abyssal ooze. 



The Corals, though numerous, are not well preserved. They have 

 been very carefully and judiciously dealt with ; and have yielded 

 about 21 species in 15 genera. Those of the Craighead Limestone 

 have Lower-Silurian characters ; from the other localities they 

 indicate Upper-Silurian age. Chmtetes and Fistidipora are here 

 included in the Actinozoa for convenience, though belonging possibly 

 to the Polyzoa. In naming a new genus of Corals after Lindstrom, 

 the authors should have written Lindstroemia, instead of retaining 

 the Swedish form of the diphthong. Though the German and some 

 other printers abroad have not the necessary type, we have it, and 

 should use it in Latinized words, such also as Lindstrozmi and 

 Koenigi, elsewhere in the Monograph. 



Several of the Trilobites are described and figured in this 

 Fasciculus. Great care has been taken both with descriptions and 

 figures ; also with synonyms, and the references to other writers 

 and observers. This indeed holds good with the descriptions of the 

 fossils throughout. We must remark that no reason is given why 

 the Trilobites are retained among the " Entomostraca." Advanced 

 Carcinology (as represented by Henry Woodward's " Catal. Brit. 

 Crustacea," Brit. Mus. 1877) gives them a higher place, between 

 the Isopoda and the Amphipoda. 



A Bibliography of the Silurian Fossils of the Girvan District, from 

 1849 to 1878, occupies pages 1-6 ; and a list of definite localities 

 of the fossils fills page 7. Everything promises well for future 

 Fasciculi of this Monograph, so well begun ; its good appearance and 

 trustworthy contents are the praiseworthy results of careful printers 

 1 Geol. Mag. Dec. II. Vol. III. p. 134. 



