376 Viscount d'ARCHiAC and M. de Verneuil's 



The thinness of the shell, the form of the beaks, and the absence of a posterior fold, have induced us to 

 place this fossil among the LucincB, until a knowledge of its hinge shall enable us positively to decide +. 

 We are obliged to M. Puzos for the opportunity of making known this very rare species. 

 Sotenich. 



Sanguinolaria ? 



We refer to this genus a bivalve cast, which in form is related to S. pygmcca, Goldf., PI, CLIX. 

 f. 20. It is of the same size as S. striata, Miinster (see Goldf., PI. CLIX. f. 19.). 

 Villmar; very rare. 



Pholadomya Munsteri, nob., Tab. nost., XXXVII. f. 3, 3 a. 



Shell transverse, securiform, inequilateral, rather sharp-edged in front, inflated in the middle and very 

 compressed and prolonged backward. Beaks rounded, inflated, curved, and contiguous. Concen- 

 tric folds regular, very distinct, extending from the anterior part of the valves to the posterior de- 

 pression, where they become attenuated, and disappear altogether far in front of the rostriform angle 

 which terminates the shell. Upper edge concave from the beaks to the rostrum. Lower edo-e con- 

 vex. Muscular impressions semilunar, very distinct near the beaks, and placed near the upper edge 

 where the transverse folds terminate. Length, 37 millim. ; width, 67 ; thickness, 30. 



This shell is nearly allied to the Lutraria prisca, Goldf., PI. 153. f. 9. 



Bensberg, Eifel ; rare. 



1. Solen pelagicus, Goldf. Petref. Germ., PI. CLIX. f. 2. Tab. nost., XXXVII. f. 5, 5 a, 5 b. 



We have given a representation of the cast of a Solen, which appears to be related to the species 

 figured under this name by Goldfuss. 

 From Lustheide. 



2. Solen Lustheidii, nob., Tab. nost., XXXVII. f. 4, 4 a, 4 b. 



This species, of which we only know the fragment of a cast, has appeared to us to differ from the 

 preceding sufficiently to warrant us in distinguishing it by another name. 

 Lustheide ; rare. 



Ctenocrinus typus, Bronn, N. Jahrb., 1840, p. 542. Tab. nost., XXXVII. f. 7. 



We have also figured this remarkable Crinoidal fossil from the grauwacke of the duchy of Nassau 

 to show the pinnules or tentacles of the fingers, which could not have been visible on the specimen which 

 Bronn has figured. 



At the foot of the Hausling near Arnsberg, and near Ems. 



t Many of the true LucincB have a posterior fold ; further, it is not by the hinge that we can decide 

 a Lueina, but by the muscular impressions. (Remark by Mr. G. Sowerby, the Translator of the De- 

 scriptions of the Fossils.) 



[For an account of some of the Silurian Fossils of the Rhenish Provinces see Mr. J. de Carle Sowerby 's 

 description, Appendix /jostea, p. 408.] 



Note to the Table commencing page 380. 

 The capitals which follow the names of the places in the column " Localities in Europe," are intro- 

 duced to distinguish the system which occurs at these points : e. g. Orthoceratites calamiteus. Wissen- 

 bach, S., Chimay, Refrath, &c., D., signify that Wissenbach stands on the Silurian system; Chimaj',&c. 

 on the Devonian. The letter C. signifies Carboniferous System. Where the localities belono- to one 

 system no letter is given, the system being easily determined by referring to columns 4-8. 



