ON THE FOSSIL PHYLLOPODA OF THE PALHOZOIC ROCKS. 327 
Llandovery stage ;! in fact, all the British Silurian forms of Discinocaris 
come from the same general horizon—the Llandovery (Birkhill series).’ 
(3) ‘ Aptychopsis Wilsoni (p. 89) occurs in the Wenlock stage (Riccarton 
Beds).’ (4) ‘ Aptychopsis glabra (pp. 91 and 92) is from the Middle 
Silurian Buckholm Beds of the Gala Group, Meigle, Galashiels, Selkirk- 
shire. Its horizon in Tipperary may be Middle, rather than Lower, 
Silurian.’ (5) ‘ Peltocaris aptychoides (p. 93) from Duff-Kinnel belongs 
to the Llandovery stage (Birkhill Shales).’ (6) ‘ Peltocaris sp. (p. 94) 
occurs at Whitehope (not Wasthope) Burn, in the Birkhill series.’ With 
the exception of Peltocaris Harknessi, all the forms of Aptychopsis and 
Peltocaris known to Professor Lapworth are of either Llandovery or 
Lower- Wenlock age. 
2. Caryocaris Marrii. Another specimen has been observed in the 
British Museum, No. ‘42162.’ See First Report, ‘ Brit. Assoc. Report 
for 1883,’ p. 222. 
3. Linyulocaris siliquiformis. First Report, 1883, p. 223, lines 13 and 
14 from the bottom, read Schistose Bala rock, and collected by J. P., 
March 14, 1868. A fragment (from Garth) has been also noted in the 
Museum of Practical Geology, 1v 2, ‘Catal. Cambr. Sil. Foss. M.P.G.’ 
1878, p. 15. We find also another specimen of Lingulocaris lingulcecomes 
(from Garth) in the British Museum, No. ‘48001.’ See First Report, 
1883, p. 223. 
4, A form near Solenocaris, Meek, is in the Mus. Pract. Geol. x 34, 
*Catal. Cambr. Sil. Foss.’ 1878, p. 142. From Freshwater-East, Pem- 
brokeshire, north side; Ludlow Beds. 
5. Orthotonella? Fuberi, E. O. Ulrich, ‘Journ. Cincinnati Soc. Nat. 
Hist.’ vol. v. (1882 ?), p. 117, pl. 5, figs. 7, 7a, 7b, has a Phyllopodiform 
aspect, somewhat like that of Meek’s Solenocaris, and we therefore asked 
Mr. Ulrich to look at it again; and he obligingly replics that it may pos- 
sibly be one of these bivalved crustaceans. 
6. Solenocaris solenoides, Young, 1869, alluded to in our First Report, 
* Brit. Assoc. Report’ for 1883, pp. 217 and 223, as a conchiferoidal 
Phyllopod, has been further studied, good specimens having been kindly 
supplied by Mrs. Gray, of Edinburgh. It is carefully described and 
figured in the ‘ Geol. Mag.’ for August 1885, p. 356, pl. 1x, fig. 11; and, 
proving not to be a Phyllopod, is referred to Helminthochiton as H. sole- 
noides (Young); and another species ‘of the same genus has been found 
by Mrs. Gray at Thraive, near Girvan, and has been described with the 
former as H.Grayice, H. Woodward, figs. 7-10. The little ‘ oblong, obliquely 
ridged, and concentrically marked ’ bodies are moieties of the dorsal plates 
of Helminthochiton. A nearly perfect series of whole plates found by 
Mrs. Gray at Thraive, near Girvan, is figured and described in Dr. 
Woodward’s memoir. 
7. With reference to Goniatites having Aptychi or Anaptychi, and as 
to some of the so-called Phyllopodous shields being really such parts of 
Goniatites,? we have to state that, in confirmation of Herr Kayser’s 
discovery of a‘ Spathiocaris ’ in the body-chamber of a Devonian Goniatite, 
we have now seen some similar examples from Bicken; and that we 
believe some of the so-called Phyllopodous shields which come from 
} We notice that in the Quart. Journ. Geol. Soc. xxxvi. 1880, p. 617, Mr. Marr 
States that Herr Dusl has three specimens of Discinocaris Browniana from the 
Strata of ‘Colonie Haidinger,’ in Bohemia (= Stage E e 1, according to Mr. Marr). 
? See the Second Report, 1884, p. 76. 
