POLYMASTIA. 33 



and a half inches in diameter, almost entirely covering 

 the external surface of the flat valve of a Pecten maxi- 

 mus. This sponge has about one hundred and fifty 

 fistula ; and on the inside of the valve of the Pecten 

 are three or four very thin circular or oval spots of 

 the same sponge in a very young state, before any 

 fistular appendages are developed. 



8. POLYMASTIA CONIGERA, Bow., in, 192; PI. LXXII, 

 figs. 1316. 



Genus 10. HALYPHYSEMA, Bow., i, 179; n, 5. 



(= SQUAMULINA, Carter, but not of Schultzej 



1. HALYPHYSEMA TUMANOWICZII, Bow., n, 76; i, PL 

 XXX, fig. 359. 



1866 Haliphysema Tumanowiczii, O. Schmidt. Zweite Sup- 

 plement d. Spong. d. Adriatischen Meeres, p. 13, pi. i, 

 fig. 13 (copy from Bowerbank). 



1868 Halyphysema Tumanowiczii, Parfitt. Trans. Devon. 

 Assoc. Sci. Lit. and Art., p. 14 (separate copy) ; and 

 Ann. Nat. Hist., ser. v, vol. i (1878), p. 88. 



1870 Squamulina scopula, Carter. Ann. Nat. Hist., ser. 4, 

 vol. v, p. 310, pi. iv, figs. 111 ; and vol. xx (1877), 

 p. 337; ser. 5, vol. i (1878), p. 172; vol. iii (1879), 

 p. 407. 



1877 Haliphysema primordiale, Haeckel. Biologische Stu- 

 dien, p. 180, pi. ix. 



1877 Haliphysema Tumanowiczii, Haeckel. 1. c., p. 192. 



1877 Gastrophysema dithalamium, Haeckel. 1. c., p. 196, 

 pis. xii xiv. 



1877 Gastrophysema scopula, Haeckel. 1. c., p. 206. 



1878 Squamulina scopula, Kent. Ann. Nat. Hist., ser. 5, 



vol. i, p. 1. 



1878 Haliphysema Tumanowiczii, Norman. Ann. Nat. Hist., 

 ser. 5, vol. i, p. 274. 



VOL IV. 3 



