Dr. S. Woodward — On Apti/chiis and AptycJwpsis. 345 



II. — On Some Paleozoic Phyllopod-Shields, and on Nebalia 

 AND ITS Allies. 



By Henry Woodward, LL.D., F.E.S., F.G.S., etc. 



(PLATE IX. Figs. 1-6.) 



IN a paper lately published in the "Neues Jahrbuch " (Band i, 

 1884), Herr W. Dames, of Berlin, has made some observations 

 " On the Phyllopod-nature of Spathiocai-is, Aptychopsis, and similar 

 bodies," met with in strata of Silurian, Devonian and Carboniferous 

 ages in Europe and North America, and described by Barrande, 

 Salter, M'Coy, Meek, Hall, Clarke, Jones, myself, and others. 



After an elaborate criticism of the subject, the author concludes : — 



1. — That some of the bodies in question are the AptijcTii of 

 Goniatites. 



2. — That for others, this explanation is, according to our present 

 knowledge, inadmissible. 



3. — That the last are, however, in no case Phyllopods. 



(1.) In reference to the first conclusion, Herr Dames refers to the 

 discovery by Herr Kayser of a specimen of Goniatites intumescens, 

 from the Devonian of Bicken, with an AptycJius lying in its body- 

 chamber (Zeitschrift der Deutsch. Geol. Gesellsch., 1882, bd. xxxiv. 

 p. 819). Not having seen the specimen briefly referred to by Herr 

 Kayser (of which no figure is given), I was unable to offer an 

 opinion as to the correctness, or otherwise, of Herr Dames' conclusion. 



The British Museum has, however, lately obtained from Krantz and 

 Co., of Bonn, several specimens of these Aptyclms-\\kQ ^ bodies, 

 from the black limestone of Bicken ; and my colleague, Mr. Eobert 

 Etheridge, jun., has fortunately discovered among them a sp.ecimen 

 of a small Goniatites intumescens with an imperfect Aptychus in situ 

 in its mouth-aperture. 



1 give a figure of the specimen in the accompanying Plate (PI. 

 IX. Figs. 1, 2). 



This Aptychus seems to agree most nearly in form with my so- 

 called " Cardiocaris lata," from Budesheim in the Eifel,^ also observed 

 by Mr. Clarke at Bicken.^ The other specimens of Aptychus-like 

 bodies, not in situ, but from the same black Devonian limestone, 

 agree very closely with Mr. J. M. Clarke's Spatliiocaris Koeneni (see 

 Neues Jahrbuch, 1884, bd. i. hft. 2, p. 182, taf. iv. fig. 1), from Bicken. 



The discovery made by Herr Kayser, at Bicken, of a (roniatite- 

 shell with an Aptychus lying in its body-chamber, and casually 

 noticed in 1882,* having now been verified by the finding of another 



^ Labelled " Sfromaiopora concentrica, Goldf., Culm, Bicken bei Herborn, Nassau." 

 I have also received a specimen of Aptychus from my friend Mr. John Edward Lee, 

 F.G.S., of Torquay, sent to him by Prof. Ferd. Eoemer, of Breslau, and labelled 

 " Aptychopsis, sp. = operculum of Goniatites intumescens, Upper Devonian, Bicken, 

 near Herborn, Nassau," in Dr. Eoemer's own handwriting. 



2 See Geol. Mag. 1882, Dec. II. Vol. IX. PI. IX. Fig. 13, p. 388. 



•' See " Ueber deutsche oberdevonische Crustaceen von. J. M. Clarke, zur zeit in 

 Gottingen," Tafel. iv. fig. 2, N. Jahrbuch f. Min. etc. 1884, bd. i. p. 181. 

 * Zeitschr. der Deutsch. Geol. Gesellsch. bd. xxxiv. p. 819. 



