62 REPOBT — 1887. 



dififers from any we know of, thoagli it approaclies that assigned to G. 

 patula, J. and W. It is very neat in aspect and might be called concinna. 



8. G. Scharyi, Barrande, var. — Seven abdominal segments (first and 

 last imperfect), some with the test, some shown only by impressions ; 

 crushed laterally, and showing the whole half from the back to the epimeral 

 border. In shape they are not unlike those of C. »9cAari/i, Barrande. They 

 are ornamented with a strong leaf-like lattice-pattern, as in that species, 

 but the lattice-pattern dies out into irregular oblique lines on the lower 

 part of each segment (as in G. stygia, &c.), instead of being continued all 

 over it as in G. Schariji ; nor is the smaller (secondaiy) lattice-work inside 

 each leaf-mark so distinct as in that species, but presents merely a wrinkled 

 appearance. (This is part of fig. 1 in Angelin's unpublished Table B.) 



In hard blue micaceous shale (Ludlow), from the lake Ringsjon, 

 Scania. 



9. Ceratiocaris pedinata, sp. nov. — A portion of an ultimate segment 

 (14x6 mm.), with a telson (fragment 30 mm.) and one stylet (not quite 

 perfect, 22 mm.). The segment retains scarcely any of the test, but shows 

 traces of an ornament of irregular small tubercles and interrupted lon- 

 gitudinal lines, and the distal margin of the segment has a coarse 

 comb-like fringe, consisting of a regular set of thin elongate tubercles, 

 reminding us of the di op-like tubercles on marginal parts of some 

 Eurypterids. (Fig. 2 in Angelin's unpublished Table B.) 



The head of the telson is wrinkled longitudinally, and both the style 

 and the stylet are ridged and furrowed. This form is new to us. Its 

 comb-like fringe suggests the name fectinata. 



In earthy micaceous blue-grey limestone, from the Ringsjon, Scania. 



10. PJiasganocaris, Novak. — Phasganocaris pugio {Bsirr.), var. serrata, 

 nov. — Flattened pieces of tapering, riband-like telsons, with a central 

 line, sometimes raised, but usually sunken, which was originally a ridge 

 in all probability. From it, on each side, numerous parallel, oblique, 

 sigmoid lines pass downwards and outwards, and these end at the edges 

 with sharp upward curves, defining the small subtriangular teeth of a 

 serrated fringe. This is of varying strength, and is sometimes backed 

 by a slio'ht ridge. Except in the serrated edges these specimens cor- 

 respond in essential pai'ticulars with the dorsal aspect of the triangular 

 or bayonet-like lower portion of the telsons referred by Barrande to 

 Eurypterus,^ but by 0. Novak, lately and with precision, to his new 

 genus Phasganocaris."^ 



The fragments, dark brown and chitinous in appearance, are in an 

 earthy yellowish grey limestone (Lower- Ludlow) from Vattenfallet (the 

 "Waterfall), near Wisby, Gothland. 



11. Phasganocaris pugio (Barr.), var. serrata, nov. — A longer and 

 narrower piece of a telson, badly preserved, much crushed and wrinkled, 

 but retaining some convexity, and its upper end showing a slightly 

 triangular section. Dark brown and chitinou^ in a blue-grey, calcareous, 

 and finely micaceous shale (Ludlow), from the Ringsjon, Scania. 



§ III. DiTHYROCAEis.^ — This genus, as recognised by its carapace and 

 abdominal appendages, is now known in three of the Paleozoic formations, 



• E. pugio, Barr., Sil. Si/st. BoMnie, vol. i. Suppl. p. 564, pi. 26, figs. 25-34, and pi. 

 34, figs. 7-9. 



2 Ph. pugio, Novak, Sit:tin//sh. k. bohm. Genell. Wissensch., 1886, pp. 1-4, pi. 1. 

 s Referred to in the First Report, 1883, Brit. Assoc. Reports for 1883, p. 216. 



