BIBLIOGRAPHY OF PALAOZOIC CRUSTACEA 115 
Vogdes (A. W.) Notes on Paleozoic Crustacea, No. 5. Carbonifer- 
ous Trilobites from Missouri. 
Proc. Cal. Acad. Sci., 2nd ser., vol. 6, 1896, p. 197, fig. in text. 
Proetus ? placidus nov. 
This species from Chouteau limestone of Sedalia has the lateral lobes of the pygidium 
smooth, similar to the Silurian species of France named by Rouault Calymmene Arago 
and C. Salteri, although it belongs to a different group of the Proetidae, with only 
nine thorax segments. The head is parabolic in form, genal angles rounded. The 
eyes are similar in location to those of P/illipsia Sampsont from the same locality. 
The tail has eight axial joints with indications of two faintly defined segments on the 
lateral lobes. 
The genus Enecrinurus: its history, its species, its proper di- 
vision in the family of Trilobites. 
Trans. San Diego Soc. Nat. Hist., vol. 1, 1907, No. 2, pp. 61-82, plates 1-3. 
The author divides the family into two divisions: 
Encrinurus. Genotype E. punctatus Wahl. 
Cryptonymus. Genotype C. variolaris Brong. 
Although Eichwald used this term in 1825 for certain Asaphidae and Illaenidae, he 
used the same term in 1840 for such species as Calymmene punctatus and C. variolaris, 
which was adopted by Angelin. The term should stand under the strict rule of 
priority for the second use of the term. 
Cryptonymus Eichwald, 1840. 
The author uses it for the second species included by Eichwald in 1840. Figures 
and descriptions of Encrinurus punctatus Walh., E. vigilans Hall, E. ornatus H. & W., 
E. Threcheri Foerste, E. Trentonensis Walc., E. nereus Hall, E. Eagani Miller, E. 
Americanus Vogd., E. sex-costata Salt., E. delitides Shumard, E. Barrandet DeKon., 
E. Mitchelli Foerste, E. schisticola Térng., E. Seebachi Schm., E. multi-segmatus Portl., 
E. fallax Reed, as given. 
Under the genus Cryptonymus the author includes Cryptonymus variolaris Brong., 
C. expansa Hasw. Henderson, 1868, refers the free cheeks of Zethus Payeti Haswell, 
to E. expansus. C. obtusus Ang., FE. raricostatus Wal., C. laevis Ang., Encrinurus 
Bowningi Foerste, E. tuberculatus Collie. 
Certain species described by Barrande under the genus Cromus have been referred 
by Novak to the genus Encrinurus on account of the direction of the facial sutures, 
which are the same in both genera. They are Cromus Beaumonti, C. Bohemicus, C. 
transient and C. intercostatus. The Encrinurus Novaki Frech, has been referred to 
‘Encrinurus Beaumonti var., Novaki by Gornani and Le Regny. 
Remarks the name of Exncrinurus punctatus has often been applied to a common 
Scandinavian species, first illustrated hy Wahlenberg in an advanced publication of his 
paper in 1818. Petrificata telluris Svencanae, Brunnich’s fossil from Bohemia, from a 
soft yellow limestone, may be the Cromus Beaumonti Barr. The author remarks, in 
his paper, on two very imperfect petrified impressions of this fossil, that it had across 
the fossil body impressed spotted rings, which marks are sufficient to distinguish them 
from other species. The size of it seems to vary greatly, as my collection contains one 
small and one very large back part of this species; each has 18 joints. The only 
Bohemian Encrinuride recorded are those described under Cromus by Barrande and 
Novak. 
Verneuil (E.) Observations sur la description de quelque Trilobites 
russes par M. A. de Volborth. 
Bull. Soc. Geol. de France, 2nd ser., vol. 5, 1848, p. 384. 
Review of Dr. Volborth’s paper on the genus Zethus. 
