2 
VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I 
left with Merocrinus, Dendrocrinm, Homocrinus, and Thenaro- 
crinus , in a freshly diagnosed Family, Dendrocrinidse. 
At last I have devoted some time to the further preparation 
and study of the original material, and I find so many small 
details in which the very clear description by Mr. Billings can 
be supplemented or slightly emended that it seems well to pub- 
lish an entirely fresh description. All deviations from the pre- 
vious account are made with intention, after careful considera- 
tion. 
TERMINOLOGY. 
The terms and symbols employed in the description and 
diagrams are, for the most part, those used in my papers on 
British Fossil Crinoids, and are explained in “A Treatise on 
Zoology, Part III” (1900). IBB = Infrabasals; BB — Basals ; 
RR — Radials ; Ri — Inf erradial ; R„s = Superradial ; RA = Radianal ; 
x — proximal anal plate ; Br = Braehials ; IBr = Primibrachs ; I Ax 
— Primaxil; r. = right; L — left; ant. = anterior; post, or p.= 
posterior. 
Various terms in the description of the stem are used as de- 
fined in u Triassic Echinoderms of Bakony” (Budapest, 1909). 
DESCRIPTION OF THE HOLOTYPE. 
The Cup (Plate I, figs. 1, 2) in outer form merges equably into 
the stem below and the arms above, expanding from 
3*6+ 2*8 
2 
= 3*2 mm. below, to 
4 * 8-{-3 
2 
= 3-9 mm. above (at top of Rs). 
The height, measured along the slope, from the stem to the top 
of Rs, is 6 mm. in r. post, ray, 5*6 mm. in ant. ray and in 1. post, 
ray; but measured to top of Rt, it is 4*5 mm. in r, post, ray, 4*1 
mm. in ant. ray, 4*2 mm. in 1. post. ray. 
IBB (Plate I, figs. 1, 2, 3) 5, hexagonal, alternating with the 
proximal pentameres of the stem. The lower angle is more 
obtuse than the upper. The l.ant.IB has a height of 1*7 mm.; 
width above, 2*2 mm.; width below, about 2*1 mm. 
1 This mode of expression gives the actual extreme measurements in the compressed 
fossil, and then the mean. 
