J.M. ADRAIN AND R.A. FORTEY 
PLATE 13 
Figs 1-3 Oopsites hibernicus (Reed in Gardiner and Reynolds, 1909). 1a-b, It. 26111, cranidium, dorsal and anterior views, x15. 2a-b, It. 26112, 
cranidium and left librigena, dorsal and left lateral views, x15. 3, It. 26113, left librigena, left lateral view, x15. 
Figs 4,5 Opipeuter aff. O. inconnivus Fortey, 1974 4, It. 26114, cranidium, right dorsolateral view, x15. 5, It. 26115, right librigena, external view, x15. 
Figs 6,7,9,10 Phaseolops ceryx sp. nov. 6, It. 12856, cranidium, dorsal view, x15. 7a-b, It. 12857, cranidium, dorsal and left lateral views, x15. 9, It. 
26116, cranidium, dorsal view, x15; 10, It. 26117, cranidium, dorsal view, x15. 
Fig. 8 Proscharyia platylimbata sp. nov. It. 26118, pygidium, dorsal view, x15. 
Fig. 11 Glaphurus crinitus sp. nov. It. 26119, cranidium, dorsal view, x10. 
DISCUSSION. Ludvigsen (1980: 99) has fully discussed this genus, 
assigning it to the Bathyuridae. Fortey & Shergold (1984: 322) 
considered that it was related to Annamitella Mansuy, 1920, on the 
basis of glabellar characters, and assigned both to Leiostegiidae. 
Within the genus as conceived by these workers there is a group of 
similar species, including A. acheila (Harrington & Leanza, 1957), 
A. norrisi Ludvigsen, 1980, and A. praematura Tjernvik, 1956. It is 
these species that most resemble Annamitella, and all have a rela- 
tively elongate anterior border, incised glabellar furrows, a 
concave-sided glabella, and a pygidium with a subdued border 
lacking raised lines. The Sunwaptan species described as 
Bellaspidella parallela Ludvigsen & Westrop in Ludvigsen et al. 
1989, appears to share all of these morphological features, and may 
prove to belong there. All are seemingly related to the Chinese taxon 
Hexianella Zhang, 1983, to which they are transferred herein. The 
pygidia assigned to H. hexianensis and H. exigusulcata by Zhang 
(1983: pl. 75, figs 6, 8) do not belong, but appear to be nileid 
transitory pygidia. 
A second group includes the type species of Agerina and A. 
pamphylica Dean, 1973. These species have the glabellar furrows 
considerably effaced, the glabella more nearly parallel sided, and the 
pygidium with a border carrying prominent subparallel raised lines. 
Of described species, A. palabunda is closer to this second, Arenig, 
group, and is perhaps most similar to A. pamphylica. Dean’s species 
does show some lateral concavity of the glabella (Dean 1973: pl. 4, 
fig. 1), although it is less well developed and anterior than in A. 
palabunda. 
Family CELMIDAHE Jaanusson, 1956 
Genus CELMUS Angelin, 1854 
Ischyrophyma Whittington, 1963: 48. 
