386 Dr. H. Woochvard — New Palceozoic PJujUojjod Cncstaceans. 



Had it been possible to have described these fossil organisms upon 

 the spot, and make careful drawings of them at the time, I do not 

 doubt but that I should have been enabled to do them fuller justice 

 than I can now after an interval of four years ; but other claims upon 

 my time have prevented my undertaking their description earlier. 



The specimens selected and figured on Plate IX. (which, toith one 

 exception, are all from Biidesheim) seem to resolve themselves into 

 three genera and six species. 



Fifteen of the Eifel specimens I have referred to one genus, which 

 I propose to name Cardiocaris ; the sixteenth I propose to call 

 PJwladocaris ; the seventeenth specimen was obtained by Mr. J. E. 

 Lee at Pencerrig in Wales, and I have referred it to the genus 

 AptycJwpsis. 



(I had at first wished to place the first fifteen of these forms in 

 the genus Aspidocaris, but I found that this name was already 

 adopted by the late lamented Prof. Eeuss, of Vienna, for a series of 

 Phyllopod shields from the Alpine Trias of Eaibl, Austria.^ These 

 specimens agree so vei-y closely with Discinocaris,'^ a genus proposed 

 by me for certain Phyllopod shields from the Moffat Shales, Dum- 

 friesshire, that I am unwilling to complicate matters by adding these 

 Eifel specimens to Eeuss's Triassic genus, as a later examination 

 may induce me to refer Eeuss's Aspidocaris to the genus Discinocaris, 

 when the former would sink into a synonym.) 



I. Cardiocaris,^ gen. nov. 

 1. Cardiocaris Boemeri, mihi, sp. nov. PL IX. Figs. 1-7. 



In dedicating this species to my esteemed friend and fellow- 

 worker, Prof. Dr. Ferdinand Eoemer, of Breslau, I feel that I am 

 adding to the value of the specimens which will bear his honoured 

 name, and that Mr. Lee's collection will be the richer for this 

 souvenir of a friendship with this eminent geologist which he has 

 shared for some years with myself. 



To this species I have referred three of the largest, and four of the 

 smallest, of these phyllopod shields; all of those having an ellip- 

 tical outline and in which the anterior angles, formed with the 

 cervical furrow or groove, are more or less acute. 



The best preserved of these is depicted in Fig. 1, which measures 

 35 millimetres in greatest length (and probably measured 45 mm. 

 before the loss of its anterior or cephalic portion), and 20 mm. in 

 greatest breadth. The dorsal suture, if present, seems extremely 

 obscure ; the concentric striee are pretty numerous, and are marked 

 at intervals by a line of greater strength than the rest. There are 

 also numerous delicate radiating strige which take their rise just 

 behind the base of the V-shaped cervical furrow and spread out 

 fan- wise towards the posterior border, which is slightly emarginated 

 behind. 



Fig. 2 is only a fragment of a much larger shield, which must 



1 Sitz. d. K. Akad. d. Wissensch. I. Abth. Februar-Heft, Jahrg. 1867. 



2 Quart. Joiirn. Geol. Soc. 1866 (vol. xxii. p. 503, pi. xxv. figs. 4, 5, and 7.) 



3 From KapSla, a heart ; and Kaph, a shrimp. 



