BIBLIOGRAPHY OF PAL.^OZOIC CRUSTACEA. 35 



Essai sur le systeme silurien de I'Amerique 



Septentrionale. Paris, 1843, 27 pis. 



Asaphus micrurui, A. Ihnulurus, A. cordieri, A. caudatus, A. edwardii, 

 A. murchisoni. Homalonotus giganteus, H. herculaneus, H. atlas. Arcti- 

 nurus n. g., A. boUo7ii. Calymene biifo. Odontocephalus. Acantholoma. 

 AspidolUes. Discrannrus. 



The author illustrates plate 2, figs. 1-4, several sections of Phacops 

 biifo Green, from Cai^on, Virginia. 



The first figure shows a transverse section made in the rear of the eyes. 

 Immediately below the axis there is a large cylindrical spot and another 

 on the right side occupying the position of a posterior pair of cephalic 

 legs. Fig. 4 gives a longitudinal section, with two spots corresponding to 

 two thorax segments. 



On p. ix we find the following remarks: " Upon a transverse section of 

 the thorax of a specimen of Calymene from North America. We perceive 

 a ferruginous spot which occupies the place where one ought to find the 

 cylindrical trunk of the animal, and a little lower down on the right side 

 we distingiiish another sjjot of the same kind, but of different form, which 

 resembles approximately the marks which might have been made by the 

 print of a foliaceous foot similar to that of a Branchiopod;©. In another 

 specimen w^e find upon a longitudinal fracture two sjoots of the same color, 

 but straight and elongated, which seem to correspond to two distinct 

 rings of the thorax, and which could very well be of the same nature as 

 those seen upon the face of the preceding specimen." 



Champernowne (A.) Note on a find of Homalonotus 

 in Red Beds at Torquay. 



In Geol. Mag., new series, decade 2, vol. 8, 1881, p. 487. 



Chapman (E. J.) Asaphus canadensis. 



In Canadian Jour., new series, vol. 1, 1856, p. 482. 



A review of the Trilobites, their characters 



and classification. 



In Canadian Jour., new series, vol. 1, 1856, i?. 271, woodcuts. 



Trinucleus concentricus. 



In Canadian Jour., new series, vol. 3, 1858, p. 414, woodcut. 



On some new Trilobites from Canadian rocks. 



In Annals Mag. Nat. Hist., 3d series, vol.2, 1858, p. 9, 2 figs. 

 Asaphus canadensis n. sp., A. halll n. sp. 



On some new Trilobites from Canadian rocks. 



In Canadian Jour., new series, vol. 3, 1858, p. 230, 2 woodcuts. 

 Asaphus canadensis, A. halli. 



