396 Prof. T. R. Jones on the 



privately-printed ' Notes on some Silurian Ostracoda from 

 Gothland/ 8vo, Stockholm, 1887. 



These Scandinavian specimens have now been carefully 

 figured in the accompanying Plates, and some figures and 

 descriptions of other specimens from Gothland have been 

 added, as well as further remarks on the alliances of the 

 already known species. 



Mr. C. D. Sherborn, F.G.S., has helped me in sketching 

 and collating the specimens sent from Stockholm. Several 

 exquisite drawings executed by Hr. C. Hedelin and forwarded 

 by Dr. Lindstrom in 1886 have supplied the basis for some 

 of my determinations of species. 



I. Macrocypris, G. S. Brady, 1867. 

 (Ann. & Mag. Nat. Hist. ser. 5, vol. xix. 1887, p. 178.) 



1. Macrocypris Vinei, Jones. 

 (PI. XXII. figs. 1 a, 1 ^>, 1 c, 2.) 



Macrocypris Vinei, Jones, op. cit. p. 179, pi. iv. figs. 1-3, and woodcut, 

 p. 179 ; Silur. Ostrac. Gothland, 1887, p. 6. 



Careful drawings sent to me from Stockholm represent 

 Macrocypris Vinei^ Jones. The Swedish form, however (see 

 figs. 1 a, h, c), is slightly longer, has a slightly less orbicular 

 end-view, and is more gracefully curved on the postero-dorsal 

 slope ; otherwise fig. 2 of pi. iv. referred to above very 

 closely matches the drawing sent from Stockholm. 



One specimen (PI. XXII. fig. 2) among those sent to me 

 in 1886 also comes within the limits of form characteristic of 

 Macrocypris Vinei. 



This species occurs rather copiously in the shale at Frojel * 

 (of the Wenlock series) . 



Note. — Gytheropsis siliqua, Jones (Ann. & Mag. Nat. Hist. 

 April 1858, p. 249, pi. x. fig. 6), is possibly figured in a re- 

 versed position, that is, with its dorsal edge downwards, and 

 may really be a Macrocypris squeezed and broken. If so, being 

 about 2 millim. in length, it would not be very difierent from 

 the Scandinavian specimen (PI. XXII. figs. 1 a, h, c), 

 which is 2 millim. long ; fig. 2 shows an individual 1^ mil- 

 lim. long. Of the English specimens [op. cit. March 1887, 

 pi. iv.) fig. 2 is 1^ millim. and fig. 3 is If millim. in length. 



* For the localities mentioned in this paper, as regards the Silurian 

 Ostracoda of Gothland, see the geological map appended to Prof. Lind- 

 strtim's paper on the Silurian strata of that island, in the Neues Jahrb. 

 fiir Mineral, kc. 1888, vol. i. pp. 147 &c. pi. v. 



