Revieius — Wachsmuth 8^ Springer's Monograph on Crinoids. 127 



under the name Sphcerocrinus, which, being preoccupied, was 

 changed into Coelocrimis on January 1, 1866. The genotype was 

 A. concaviis, a fairly characteristic species of what Wachsmuth and 

 Springer now wish to call " Aorocririus (nov. gen.)." The name 

 Ccelocriniis does not conflict with Coeliocriniis, White, 1863, and it 

 preceded Salter's Coelocrimis ^ by some months ; it must be adopted. 

 In 1881 Wachsmuth and Springer proposed a subgenus of Macro- 

 stijlocrinus under the name Centrocrinus. They were aware that this 

 name had been proposed by T. and T. Austin, but say that "the name 

 has never been accepted by any writer, nor was it applied to any 

 particular species by Austin himself." It was, however, accepted 

 by Meek and Worthen in 1866 {Geol Surv. Illinois, ii, p. 172), and 

 defined with Platycrinus gigas as type. Since, therefore, Centrocrinus, 

 W. & Sp., cannot stand, I have proposed" to change it to Centrio- 

 CRiNOS, from Kevrpiou, ' a sting,' in allusion to the sharp spines in the 

 type-species, C. pentaspinus. 



Gnrpocrinus, Miiller,^ cannot be replaced by Hahrocrinus, Angelin, 

 1878, on the ground of a single error in Miiller's diagnosis ; the 

 genotype ' Actinocrinns simplex' of Phillips has always been readily 

 recognized. 



There is far better reason to reject Marsupiocrinites, Phillips, 1839, 

 previously used by De Blainville 1830 ; ^ it would be replaced by 

 Cnpellcecrinus (or Cypellocrinus, as we should now write it), Shumard 

 ex Troost, 1866. 



The genus Trybliocrinus, Geinitz, 1867, is alluded to on p. 216. 

 There can be no doubt that this is the same as Spyricliocrinus, 

 Oehlert, 1891. It may also be pointed out that Clonocrinus, 

 Quenstedt, 1876, with genotype Euculyptocrinns polydactylus, M'Coy 

 (non Clonocrinus, Oehlert, 1879), takes precedence of Corymbocrinus, 

 Angelin, 1878. 



But the problems of nomenclature would keep us a thousand and 

 one nights over this Monograph, of which it is now time to take 

 leave. So full is it of matter and suggestion, that one might spend 

 years in its study. This Eeview of it, though long, has been 

 inadequate ; but the criticism at least has been carefully considei'ed 

 and outspoken. Difi'erences of opinion cannot possibly diminish the 

 great and permanent value of the book, and everyone must hope that 

 Mr. Frank Springer may be able before long to continue the work 

 in which he has for many years been the colleague of Charles 

 Wachsmuth. 



These volumes are dedicated to the memory of Louis Agassiz, and 

 it is due to the generosity of Alexander Agassiz that they appear as 

 a Memoir of the Museum of Comparative Zoology at Harvard College. 

 They are worthy of this intimate association with a great name. 



F. A. Bather. 



^ Appendix to A. C. Eamsay's " Geology of North "Wales," First Edition, 

 pp. 283, 284. 



2 Hep. Brit. Assoc, for 1898, p. 922 ; 1899. 



3 Ber, Akad. Wiss. Berlin for 1840, pp. 88-106 ; [July?] 1840. Carpocrmus on 

 p. 92. 



* See F. A. Battier, "Note on 3farsiipites testtidinarius^' : Quart. Journ. GeoL 

 Soc, xlv, pp. 172-174 ; Feb. 1889. 



