146 CLASS IV. 
composing the calyx. Rays pinnate; pinne suleate, the furrows 
confluent with the longitudinal furrow of the rays; tentacula situ- 
ated in the furrows. Mouth and anus on the ventral side; mouth 
central in the bottom of the calyx; anus lateral, tubular. 
See J. Murtier, Ueber die Gattungen und Arten der Comatulen, 
Ericuson Archiv fiir Naturgesch. 1841, s. 1389—148, and Neue 
Beitrége zur Kenntniss der Arten der Comatulen, ibid. 1848, 
s. 131—136. 
* Rays of Calyx bifid (ten-rayed). 
y y 
Sp. Comatula rosacea, Alecto europea LEACH, ForBES Brit. Starf. p.5. To 
this species belong the observations of THompson spoken of above, 
(pp. 136 and 143). Memoir on the Pentacrinus europeus, Cork, 1827. 
Comat. carinata Lam., Guar. Iconogr. Zeaph. Pl. 1. fig. 2. 
** Rays of Calyx multifid (many-rayed). 
Sp. Comatula multifida MuxEtu., Com. multiradiata Lam. &e. 
The species, which like Pentacrinus have a pelvis, form the genus Comaster 
Aaass., Murtt. Here belongs Comatula multiradiata Gop. (not Lam.) 
Fossil species of this genus are found in lithographic stone. 
Family II. Astertdea. Body depressed, free (not pediculate), « 
multangular or radiate, with integument coriaceous or calcareous. 
Row of joints calcareous internal, running along the middle of 
the rays and taking their origin from the mouth. Mouth central, 
inferior; anus dorsal or none. 
A capital work on this division was published some years back, 
System der Asteriden von J. MUELLER und F. H. TroscHett, mit 12 
Kupfertafeln, Braunschweig, 1842, 4to. As plates for this and the 
preceding family may be recommended: J. H. Lincnir De Stellis 
marus Liber singularis, Lipsize, 1733, fol. 
Phalanx I. Ophiure. Disc distinct from the arms ; with arms 
non-sulcate. Anus none. 
Euryale Lam. (G@orgonocephalus Leacn). Arms prehensile, 
contortile towards the mouth, not scutate, sub-rotund, flattish be- 
neath. Disc tumid, sub-globose, with five obtuse angles. 
According to the division of the arms the species of this tribe 
are arranged in three different genera by MUELLER and TROSCHELL. 
They are undivided in Asteronyx, divided dichotomously and only 
towards the end in J'richaster AGass., divided from the base, first 
WO Sern 
