6 JEch. 
ECHINODERMATA. 
Sladen (Tr. R. Soc. Edinb. xxxii. p. 153) describes as new : — 
Pteraster militaris var. prolata. 
Rhegaster , g. n. (Asterinid), for Solaster tumidus, D. & K., and R. 
murrayi , sp. n. 
On Astropecten muqlleri, see Marion, Ann. Mus. Mars. i. No. 2, p. 24. 
Sladen (24) divides the Astropectinidce into two subfamilies — 
1. Porcellanasteridce , in which he describes, 
Porcellanaster cceruleus , Wy.-T., caul if er, tuberosus , crassus , 
and gracilis , spp. nn. 
Styracaster , g. n., for S. horridus , armatus , spp. nn. 
Hyphalaster, g. n., for H. hyalinus, diaclematus, inermis, 
planus , spp. nn. 
Thoracaster, g. n., for T. cylindratus. 
2. Astropectinidce , of which 
Astropecten brevispinus , pedinatus , acanthifer , imbellis , 7/er- 
matophilus , pontoporceus , zebra , ze&ra var. rosea, mona- 
canthus , cingulatus, mesactus , are spp. nn. 
Compsaster and Colaster (carboniferous), gg. nn., Wortlien & Miller, 
Geol. Surv. Illin. vii. pp. 327 & 328. 
OPHIUROIDEA. 
.Lyman (1C) describes as new: — 
Pectinura tessellata, lacertosa, angulata. 
Ophiozona marmorea , clypeata. 
Ophiernus adspersus. 
Ophioglypha fasciculata , abyssorum, scutata , tenera. 
Ophiocten pattersoni. 
Ophiomastus texturatus. 
Amphiura incisa, nereis. 
Ophiochytra tenuis . 
Ophiochiton ternispinus. 
Ophiacantha bairdi, bartletti } cervicornis , lineolata , Icevipellis, scolopen- 
drica. 
Ophiomitra incisa. 
Ophiocamax fascicidata. 
Ophiocopa , g. n., for 0. spatula. 
Ophiotoma } g. n., for 0. coriacea. 
Opliiosciasma granulation. 
Opliiogeron supiinus. 
Ophiobyrsa perrieri ) serpens, hystricis, 
Ophiomyxa tumida , serpentaria. 
Ophiochondrus crassispinus , sguamosus. 
Hemieuryale tuberculosa. 
Ophiobrachion, g. n. Distinguished by hooklets replacing the arm- 
spines quite to the base of the arm — a feature found in no other 
Ophiuran. The genus is allied to Ophiomyxa and Ophiobyrsa , and stands 
nearest to the simple-armed Astrophyton. For 0. uncinatus. 
Ophiocreas spinulosus. 
