300 THE VOYAGE OF H.M.S. CHALLENGER. 
Genus Pentacrinus, Miller. 
f \ { Usually fifteen to eighteen inter- ] 
nodal joints. The hypozygal 
does not share in the cirrus- 
sockets. Generally more than | 1 
three joints between the _ irre- f : 
asterius, Linn. 
7 
Cirri large and | 
| creas 2 ised pre one Pinnule 
Sipe joints have forwar ee 
Raye sas processes, 
HA NG Six to eight internodal joints. The 
The two} times. h eee sya 
fon engeea| ) iuve ypozygal shares in the eirrus- Bog. 
as and | Citi at sockets. Only two or three joints | 2. muilleri, Oersted. 
ri first | each between the. regular arm-divi- 
ane de. L sions. J 
two joints J oe 
ee cat | | Fifteen =i 
aA twenty - five 
“ath peat cirrus-joints. ’ pote 
a YS Rays only | One or two internodal joints, . 93. maclearanus, Wyv. Thoms. 
{ . divide three 
| ieee ae to forty-five intermodal \ 4, wyville-thomsont, Jefireys. 
two joints 
united by 
L syzygy. 
Two ‘and three cirri alternately at successive nodes. Rays | 
divide three times ; each division-of two joints united by 7 5.. alternicirrus, n. sp. 
| syzygy. Four internodal joints. 
{ Ten armsonly. The third brachial a. syzygy with angular 
syzygial faces. First pinnule on the second brachial. $ 6. naresianus, N. sp. 
Eight to seventeen internodal joints. 
The two 
outer rad- { Five to seven internodal joints. } 
ials and | Nodal joints not enlarged, and | 
the _ first the hypozygal sharing but little $ 7. dlakez, n. sp. 
beyond) Rays may divide three | it the cirussockets. Syzygial 
: times. The second ea 
them uni- : 
ted by bi- a ee ae Te Eleven or twelve internodal joints. ) 
fascial arti- | brachial: P Nodal joints enlarged and pro- | 
culations. Jecting, and the hypozygal 8. decorus, Wyv. Thoms 
grooved to receive the cirrus- ; : , ; 
bases. Syzygial faces nearly | 
[ {| plane. J 
1. Pentacrinus asterius, Linn., sp. (PL X13 PES wies. 915=95>) Seika 
Pl. XVII. figs. 7, 8). 
1761. Palmier marin, Guettard, Mémoires de Mathématique et de Physique tirés des Registres de l’Academie 
Royale des Sciences, de l'année MDCCLYV., Paris, 1761, p. 225. 
1762. Encrinus, capite stelluto, ramoso dichotomo. Stipite pentagono-equisetiformi., Ellis, Phil. Trans., 
vol. lii. pt. i. for the year 1761, London, 1762, p. 358. 
1766. Isis asteria, Linneus, Systema Nature, ed. xii., Holmie, 1766, t. i. p. 1288. 
