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675 
Fam. 6. Tarromida, JI. Gen. TarruSf II. ; Tarroma, II. ; Clathrindy Gray. 
Fam. 7. Sycodendrida, II, Gen. Sycidiumy II. ; Sycodendrumy II. ; Arty- 
niumy H. ; AphroceraSy Gray. 
Fam. 8. Sycotliamnida, H. Gen. Sycotham7ius, II, ; Lenconidy Grant. 
Order III. Ccenosyca, H. 
Fam. 9. Nardopsida, H. Gen. Nar dotty 0. Sdt. ; Nardopsis, II. 
Fam. 10. Coenostoniida, H. Gen. Ccoiiostomellay H. 
Order IV. Clistosyca, H. 
Fam. 11. Clistolyntliida, H. Gen. ClistolynthuSy H. 
Fam. 12. Sycocystida, II. Gen. SycocysUsy II. ; Artynelltty II. 
Fam. 13. Lipostomida, H. Gen. Lipodomellay II. 
Order V. CopnosYCA, IT. 
Fam. 14. Sycorrhizida, H. Gen. Sycon'hiztty H. ; Aulorrhiztty II. ; Aulo- 
plerpntty II. 
Fam. 16. Sycophyllida, II, Gen. Sycophylluniy II.; Ai'tynophyllimiy II. . 
Fam. 16. Sycolepida, II. Gen. Sycolcjnsy H. 
Order VI. Metrosyca, II. 
Fam. 17. Thecometrida, II. Gen. Guancha, M.-M. ; Thecomcti'a, II. 
Fam. 18. Sycometrida, II. Gen. Sycometrtty IT. 
Schmidt, L c., describes the following new species from Greenland : — 
Leucosolenia fabriciiy 1. c. p. 91. 
Leuconitt stilifero, 1. c. p. 91. 
Sycinula pcnicillatay /. c. p. 91 ; S. egcdiiy 1. c. p. 92 ; S. davigertty 1. c. p. 92. 
Ute utriculus, 1. c. p. 93. 
Alcyoncellum gelatinosum, De Blainv. Dr. Bowerbank (/. c. 
p. 84), on comparing specimens of a calcareous sponge received 
from Australia with the figures in plate 92 of De Blainville^s 
^Manuel d^Actinologie,^ finds that they are identical. These 
specimens he had named in MS. in 1856 Grantia virgultosa. 
Giving as the earliest possible date of De Blainville^s genus 
1830, still Fleming's genus Grantia (1828) has the priority. 
Dr. Bowerbank believes De Blainville's species to be really a 
Grantiay so that it would stand as Grantia gelatinosa. This 
releases, as it were, the genus Alcyoncellum y which Dr. Bower- 
bank would maintain for the siliceous sponge figured under this 
name by Quoy and Gaimard, adding that “ unless it be deter- 
mined that genera founded on manifest errors are rightly or 
wrongly to maintain their places in science, the calcareous type 
of the genus in question must give place to the siliceous one.'' 
But is it not a fact that it was a manifest error in Quoy and 
Gaimard to apply the name Alcyoncellum to their new sponge ? 
and hence should not their application of the name be forgotten ? 
We would venture to suggest that the Australian calcareous 
sponge differs from Grantiay and that the name Alcyoncellum 
should once and ever be given to De Blainville's species. 
