1843.] Linnean Society. 175 



Ophioderma. 

 Corpus ovbiculare, squamosum, granulosum, ad periplieiiam radiatuni ; 

 radiis simplicibus squamosis ; disco in radiorum origines pvolongato, 

 infra povis genitalibus viginti ; squamis radiorum lateralibus adpressis, 

 in marginibus superioribus spiniferis, spinis simplicibus ; ossiculis ova- 

 rialibus parvis, oralibus pectinatis. 



The species on which this genus is founded, Ophiura lacertosa. 

 Lam., is stated to be rare in the ^gean Sea, and is thus character- 

 ized : — 



Oph. lacertosa. 



O. radiis convexiuscuHs ; squamis superioribus transverse oblongis : late- 

 ralibus 8-spiniferis : inferioribus quadratis. 



Of the genus Ophiomyxa of the same authors. Professor Forbes 

 also gives the following revised character : — 



Ophiomyxa. 

 Corpus pentagonale, coriaceum, Iseve, ad periplieriam radiatiim ; radiis 

 simplicibus, interrupte squamosis ; disco in I'adiorum origines prolon- 

 gate ; squamis radiorum lateralibus spiniferis, spinis serrulatis ; ossi- 

 culis ovarialibus binis parvis, oralibus spinis serrulatis armatis. 

 The ^gean species, 0. luhrica, Forbes, was found in between ten 

 and twenty fathoms water in the sea of the Cyclades. 



For a new species not uncommon in the seas of the Archipelago, 

 the author establishes the genus — 



Opiiiopsila, Forbes. 

 Corpus orbiculare, coriaceum, liEve, ad periplieriam radiatum ; radiis sim- 

 pliciter squamosis, infra disciim insertis ; squamis latetalibus subcari- 

 natis spiniferis, spinis simplicibus ; ossiculis ovarialibus parvis, oralibus 

 ad latera nudis. 

 Oph. Aranea, Forbes. 



Another new genus is constituted for the reception of the long- 

 rayed, scaly and smooth-bodied Ophiuridce, with simple tentacula and 

 smooth spines, and is characterized as follows : — 



Amphiura, Forbes. 

 Corpus orbiculare, squamosum, leeve, ad periplieriam radiatum ; radiis 

 simplicibus squamosis, infra discum insertis ; squamis lateralibus sub- 

 carinatis spiniferis, spinis simplicibus ; ossiculis ovarialibus parvis, ora- 

 libus ad latera nudis ; cirrhis simplicibus. 



Three species inhabit the ^gean Sea, of which one is undescribed. 

 Their characters are thus given : — 

 A. florifeka, Forbes. 

 A. disco squamis cenlralibus niaximis rosulalis, scutellis ovatis disjiniclis, 



i 



