E. M^Andrew in the Gulf of Suez. 121 



Temnopleurus toreumaticus, Agassiz ; Dujard. & Hiipd, p. 514; 

 Gray, P. Z. S. 1855, p. 39. 



Cidaris toreumaficus, Klein. 

 Echmus seulptus, Lamk. 



Hah. Red Sea. Subfossil, Isle of Karrah (Dujardin). 



Fam. Echinidae. 

 Echintdes, Dujard, & Hup^, Echin. p. 440. 



Tripneustes ? 



Hah. Red Sea ; Gulf of Suez (M' Andrew). B.M. 



" Pure red when alive " (M' Andrew). B.M. 

 Tripneustes ? 



Hab. Red Sea; Gulf of Suez (M' Andrew). B.M. 



"White when alive" (M' Andrew). 



Fam. Echinometridae. 



Echinometra lucunter^ Gray ; Dujard. & Hupe, p. 538. 



Echinus lucimter, Linn. 



Hab. Red Sea ; Gulf of Suez (M^ Andrew). B.M. 



Tubercles very numerous, small. 

 ? Echinometra heteropora, Agassiz ; Dujard. & Hupe, p. 538. 



Hah. Red Sea. Subfossil (Dujardin). 



Acrocladia mamillataj Agassiz ; Dujard. & Hupd, p. 539. 



Cidaris mamillatus, Leske, t. 6, t. 39. f. 1. 

 Echinus maniillattts, Lamk. 

 Echinometra mamiUata, Blainv., Martens. 

 Heterocentrotus mamillatus, Brandt. 



Hah. Red Sea; Gulf of Suez (M'Andrew). B.M. 



The spines vary greatly in shape ; they are usually clavate, 

 but more or less three-keeled near the end, which is generally 

 rounded. 



The short, broad, top spine in two of the specimens was 

 dark brown ; in another paler. 



Acrocladia planispina, Martens, Verb, zool.-bot. Ges. in Wien, 

 1866, p. 381 ; Zool. Record, 1866, p. 617. 



Hab. Red Sea (Martens). 



Spines not triangular as in .4. trigonaria, nor club-shaped 

 as in A. mamiUata, nor cylindrical as in another Red Sea species, 



