CUPRESSOCRINUS. 207 



characters that are observable. The facet of attachment is very large, being about 

 half the width of the calyx ; the basals are large and erect, and reach rather high 

 up ; the radials are rather short ; the suture-lines are clear and somewhat 

 excavate, and the general facies of the fossil so closely corresponds with the 

 German species that there is a presumptive reason for identifying it with it. 



A small calyx, wanting the basal plates, in the Museum of Practical Geology, 

 is most probably the original both of Phillips's ' Pal. Foss.' figure, pi. lx, fig. 39 

 (PI. tuberculatus) , and of Austin's ' Crinoids,' pi. vi, fig. 3 6 (II. macrotatus). 

 Schultze has recognised the specific agreement of these figures of the two English 

 authors, and rightly, inasmuch as they are in all probability both drawn from the 

 same specimen. When, however, Midler and he identify them with St. fritillus 

 there seems reason for dissent. The original specimen (from which both figures 

 are drawn) seems to agree with the other fossil figured as H. macrotatus by Austin, 

 as well as with other specimens which show that species to be larger than, and 

 quite distinct from, St. fritillus, and clearly to belong to the genus Hexacrinus. 



Wachsmuth and Springer definitely separated this species from Platycrinus on 

 account of the arrangement of the upper part of the calyx which is unseen in our 

 only English specimen. 



III. Family. — Cupressocrinid.u, F. Romer, 1855. 

 1. Genus. — Cupressocrinus, Goldfuss, 1826—1834. 



Column with central and lateral canals. Dorsal cup broadly vasiform. Infra- 

 basal circlet undivided, pentagonal. Basals five, equal, pentagonal. Radials 

 five, wide, pentagonal. Muscle-plates large anchylosed, horizontal, pierced by 

 ambulacra! and anal grooves. Arms five, simple, composed of massive transverse 

 quadrate plates. 



Mr. Bather is disposed to consider that the supposed infra-basal circlet is 

 really the enlarged proximal columnal of the stem. 



1. Cupressocrinus crassus, Goldfuss. Plate XXIV, figs. 4, 4 a. 



1826. Cupkessocbinus ceassds, Goldfuss. Petref. Germ., vol. i, p. 212, pi. lxiv, 



fig. 4. 

 2S33 _ — Bronn. Letb. Geogn., vol. i, p. 64. 



1835. — Agassiz. Mem. Soc. jNTeuchatel, vol. i, p. 198. 



2839. — Goldfuss. Nov. Acta Akad. Leop., vol. xix, 



pt. 1, p. 331, pi. xxx, fig. 1. 



