F. R. Cowper Reed—Girvan Crustacea, ete. 113 
Pinnocaris Lapworthi figured by Jones & Woodward.' When only 
the broader part is preserved they resemble Hyolithes, but it is found 
that the apex is prolonged into a slender spine of greater or less length 
in complete specimens; and they possess a black shining chitinous (?) 
shell like Solenocaris solenoides. In Mrs. Gray’s collection there is one 
from Dow Hill measuring 34 mm. long and 3 mm. wide at its base, and 
another measuring a little over 30mm. long. The flattened broader part, 
which is equal to about half the length of the whole style, tapers very 
slightly, has a rounded or truncate base, and is marked with a faint 
diagonal ridge, above which are weak longitudinal ridges or striz, and 
below which are fine regular transverse strie curving forwards a little 
to meet the diagonal. The spine is slender and rounded, and scarcely 
tapers at all from its base. Occasionally the whole basal portion of 
the style is crossed by the transverse strie, and the diagonal and 
longitudinal lines seem absent; and probably we here see the inferior 
face of the spine, if it was triangular in cross section. 
Hetminrnocurton Grayim, H. Woodward. (Pl. IV, Fig. 12.) 
The species was minutely described on the evidence of two pieces of 
the same individual, and its affinities were discussed by Dr. Henry 
-Woodward in 1885.* Further specimens, numbering thirteen in all, 
from the same locality, Thraive Glen, have been recently sent to me for 
examination by Mrs. Gray: ten of these are marked as coming from 
the Starfish Bed; four of them consist of internal casts and external 
impressions of two nearly perfect (?) individuals, one being as complete 
as the type, consisting of seven plates, and the other, though broken, 
showing the impression of six segments. In another impression of 
the outer surface from Thraive Glen there are seven plates distinctly 
present, though the terminal portions of the two end plates of the 
series are broken. ‘Two other specimens from the Starfish Bed, 
each with one end imperfect, show only six plates. The other 
specimens are more fragmentary, or consist of fewer plates. However, 
from the evidence of the one from Thraive Glen we may conclude 
that there were at least seven segments in the organism, and we 
cannot feel certain that there may not have been several more. The 
specimen here figured from the Stariish Bed with six distinct 
segments has traces of a seventh at the larger (anterior ?) end, 
which is bent sharply down into the matrix; the other (posterior) end 
is narrower and slightly curved upwards, and the sharp dorsal ridge is 
produced into a distinct terminal short spine, the posterior margin of 
the plate not being abruptly truncated nearly at right angles (as in 
the others) but sloping up obliquely to meet the spiniform prolongation 
of the dorsal ridge at an angle of about 30°. In all the plates there 
seems to be a short pointed process at the posterior end of the dorsal 
ridge, overlapping the succeeding plate. 
In two of the specimens from Thraive Glen the shell is preserved, 
and there seems to be on these plates, as in the external impressions 
_ 1 Jones & Woodward: Gxox. Maa., Dec. IV, Vol. II (1895), p. 544, Pl. XV, 
ig. da. 
? Woodward: Gxou. Mae., Dec. III, Vol. IT (1884), p. 352, Pl. 1X, Figs. 7-10. 
DECADE V.—VOL. IV.—NO. III. 8 
