E BE AT A. 



Page 23, line 3 from top, add " Compare also Myxobrachia cienkowski, Wagner, 1872, L. N. 23." 

 Page 40, bottom line, add "The two following species are incompletely known: Sphcerozoum 



orientale, Dana, 1863, Ann. and Mag. Nat. Hist., vol. xii. p. 54. Sphcerozoum sanderi, Dcenitz, 



1871, L. K 60, p. 71." 

 Page 65, line 15 from top, add " Cenosphcera radiata, Zittel, 1876 (L. N". 29, p. 84, Taf. ii. figs. 7, 8), 



a fossil Cretaceous species, is closely allied to Cenosphcera compacta." 

 Page 84, line 17 from top, add " Caryosphccra polysphcerica, Biitschli, 1882 (L. N. 41, Taf. xxiii. 



fig. 12) is probably a Cromyosphcera (fossil in Barbados)." 

 Page 95, line 11 from top, add " Dermatosphaira, Ehrenberg, is a Collosphcera with small pores 



(compare L. N. 16, p. 533)." 



Page 97, line 8 from foot, for "xxiv. " read "xxxiv." 

 Page 122, line 14 from foot, for " Spongolonche " read " Spongolonchis." 

 Page 149, lines 1, 4, 6 and 12 from top, for " Spongolonche " read " Spongolonchis." 

 Page 149, line 2 from foot, for " Spongolonche " read " Spongoloitchis (<nroyyo?, Xoyx'V)-" 

 Page 172, line 4 from foot, add Synonym " 1 Haliphormis hexacantha, Ehrenberg, 1872, L. N. 24, 



Taf. x. fig. 6." 



Page 216, line 11 from foot, add " Taf. xiii." 

 Page 308, line 4 from top, add " Compare Haliomma oUongum, Harting, 1863, L. N. 18, p. 15, 



pi. 2, fig. 42. 



Page 326, line 14 from foot, for " 1872 " read " 1875." 

 Page 461, line 12 from foot, delete " H." 



Page 463, line 10 from top, add " Indian Ocean, Cocos Islands, Eabbe." 

 Pa'ge 492, bottom line, add " Porodiscus haeckelii = Trematodiscus haeckelii, Biitschli, 1882, 



L. N. 41, Taf. xxiv. figs. 5a, 5b." 

 Page 509, bottom line, add " Stylodictya haeckelii, Zittel, 1876, L. N. 29, p. 85, Taf. ii. fig. 9, is a 



fossil Cretaceous species, related to Stylodictya multispina." 

 Page 534, line 11 from foot, add " Indian Ocean, Cocos Islands (Rabbe). Also in the Central 



Pacific, Station 267." 



Page 584, line 12 from top, for " 1872 " read " 1875." 

 Page 586, line 7 from foot, add " Spongotrochus ehrenbergii, Biitschli, 1882, L. N. 41, Taf. xxvi. 



figs, la, 1&." 

 Page 633, bottom line, add " Monozonium hartingii = Haliomma amphiaspis, Harting, 1863 



(L. N. 18, p. 15, pi. 2, fig. 43)." 



