PALEONTOLOGY. 273 



A valuable synopsis of the genera, occupying sixteen pages, has been 

 prepared by Charles E. Beecher. The original drawings were all made 

 by George B. Simi)son, whose name ai)pears on the title-page, and the 

 author says (p. 10) that " credit is due him for the preparation of a large 

 part of the specific descriptions." 



Prof. Charles Barrois (10) presents a review of the above volume in 

 the "Annales" of the "Soci(»te Geologique du Nord." 



James Hall (98) published in 1888 another valuable contribution to 

 the paleontology of New York State. Although many of the species 

 figured have been described before, the new descriptions and diagnoses 

 of the species, and better illustrations than have ever appeared before, 

 will be of great value to the student of iialcontolog^'. One hundred 

 and forty-four species of Crustacea are described and illustrated, ninety- 

 seven of them Trilobites, the whole included under twenty-eight genera. 

 The author acknowledges the assistance of Mr. John M. Clarke "in the 

 prei)aration of the matter for the press and in the critical study of the 

 material." A useful synopsis of genera, occupying forty-four pages, pre- 

 cedes the descriptive part of the work. The following new forms are 

 described : 



Genus Dahnanites : 



Subgenus Hausmannia, u. s.-g., p. xxxi. 

 Coronura, \\. s.-g., p. xxxii. 

 Corycephalus, n. s.-g., p. xxxiv. 

 Genus Lichaa : 



Subgenus Ccratolichas, u. s.-g. p. xl. 

 Genvis Mtsothyra, nov. geu., p. Ivi, pi. xxxii. 

 Geuus lihinocaris, nov. gen., p. Iviii. 

 Genus Schizodiscus, nov. gen., p. Ixii. 

 Genus Protohalanus, nov. gen., p. Ixii. 

 Genus Slrobilejns, nov. gen., p. Ixiii. 

 Jironteiis Tulliua, p. 12, pi. viii, f. "34-36. 

 rhaco2)s cristata, var. pijya, n. var., j}. 18, pi. viiia, f. 5-18. 

 Uausmannia, n. s.-g., p. 28. 



Dahnanites {Hansmannia) conciniius, var. serrida, n. var., p. 30, pi. xia, f. 12. 

 Dahnanites {Hausmannia) phacoptyx, p. 31, pi. xia,f. 23-26. 

 Coronura, n. s.-g., p. 33. 



Dalmanites {Cryphanis) comis, p. 41, pi. xvia, f. 1. 

 Dahnanites {Cryphams) Barrisi, p. 48, pi. xvia, f. 18. 

 Corycephahis, n. s.-g., p. 55. 



Dalmanites (Corycephahis) pygmaens, p. 56, pi. xi, f. .5-8, 

 Dahnanites anchiops, var. sobrinns, n. var., p. 62, pi. ix, f. 11. 

 Acidaspis caUicera, p. 69, pi. xvi6, f. 1-13. 

 Acidaspis Romingeri, p. 71, pi. xvi6, f. 15-18. 

 Acisdaspis, sp., p. 71, pi. xvifc, f. 14. 

 Lichas {ConoUchas) hispidus, p. 77, pi. xixa, f. 14, 17, 18. 

 Lichas ( Iloplolichas) hylwiis, p. 81, pi. xix6, f. 1, 2. 

 Lichaa {Arges) coniusus, p. 83, pi. xix&, f. 3-6. 

 Ccratolichas, n. s.-g., p. 84. 



Lichas (Ceratolichas) gryps, p. 84, pi. xixl!>, f. 7-13. 

 Lichas (Ceratolichas) dracon, p. 85, pi. xixt, f. 14-17. 



H. Mis. 142 18 



