Ofi the Palccozoi'c Divalved Entomostraca. 317 



XXXVI T. — Notes on the Fahvozoic Divalved Entomostraca. — 

 No. XXIX. On some Devonian Entoynides*. By Prof. T. 

 RUPEKT JoNKS, F.Il.S., F.G.S. 



[Plato xr.f] 



Introduction. 



Since the piiLllcition of the pnj)cr (in 1879 \) on the Devo- 

 nian Entoniides (the so-called " Cypridincn ") of Germany, 

 these little fossils have been frequently noticed by observers 

 and writers, and their true generic position has been generally 

 accepted. The lists of synonyms for the species here noticed 

 ■will supply the more important references. 



A very extensive series of specimens has been obtained of 

 three species by Mr. W. A. E. Usshcr, F.G.S., in Devon- 

 shire ; and from among them a selection has been made for 

 illustration (see PI. XI. figs. 1-4). 



A very interesting species from the Eifel district has been 

 described by Mr. J. M. Clarke, of Albany, New York, under 

 the appropriate name of Entomis variostriata ; and he has 

 kindly sent me some examples to examine and illustrate (see 

 figs. 5-8 in the same Plate). 



Entomis serratostriata. — At page 516 of the 'Versteiner- 

 ungen rhein. Schicht.-Syst. Nassau,' by G. and Fr. v. 

 Sandberger, 1850-56, it is stated that Cypridina serrato- 

 striata, Sand., had been met with at Pethcrwin, in Cornwall. 

 In his Presidential Address for 1857 General Portlock 

 expressed his doubts as to " Cyprtdijia serratostriata " 

 having been found at South Petherwin, in Cornwall, or in 

 the corresponding beds of the Pilton group in North Devon ; 

 and stated that " Mr. Godwin-Austen informs me that he saw 

 it, in company with Mr. F. RcBmer§, in beds which he con- 

 siders higher in the series " (Quart. Journ. Geol. Soc. 

 vol. xiii. }). Ixxxix). 



In Dr. Bigsby's * Thesaurus Dcvonico-Carbonifcrus,' 1878, 



* No. XXVIII. appeared in the Ann. & Mag. Nat. Hist, for October 

 1889. 



t This Plate has been drawn with the aid of a grant from the 

 Royal Society for the illustration of the fossil Ostracoda. 



X Ann. & Mag. Nat. Hist. ser. 5, vol. iv. pp. 182-187, pi. xi. 



§ Dr. Ferd. llcemer tells me (in letter of September 30, 1889) that 

 this was his late brother Fr. Adolph Tvoemer, of Clausthal ; also incor- 

 rectly referred to as " Ferd. lioemer," Ann. & Mag. Nat. Hist. ser. 4, 

 vol. xi. (1873), p. 414. 



