106 U.S. NATIONAL MTJSEUM BULLETIN 2 72 



(Potts). Carterius primitivus Swartschewsky from Lake Baikal, 

 U.S.S.R., although absent in the material available for this study, 

 most certainly also belongs here. 



In view of the restoration of Gray's (1867) system, and following 

 Schroder's (1927b) excellent revision, the remaining species of Potts' 

 original genus Heteromeyenia are now allocated to the genera Dosilia 

 Gray and Anheteromeyenia, respectively, depending on their possession 

 of stellate microscleres or complete absence of "dermal" spicules. 

 Consequently, the genera Carterius Petr, Asteromeyenia Annandale, 

 as well as Schroder's subgenera Oxheteromeyenia and Astrohetero- 

 meyenia, although widely used in previous Uterature, have thus 

 become useless in taxonomic procedure. 



Heteromeyenia haileyi (Bowerbank, 1863) 



Plate 9, figures 1-4, 15 



Spongilla haileyi Bowerbank, 1863, p. 451. — Dawson, 1878, p. 1. 



Dosilia haileyi Gray, 1867, p. 551. 



Meyenia hailexji Carter, 1881, p. 95.— Potts, 1887, p. 227.— Kirsch, 1909, p. 37.— 



Wurtz, 1950, p. 4. 

 Ephydatia haileyi Weltner, 1895, p. 114. — Smith, 1921, p. 17. 

 Heteromeyenia haileyi Schroder, 1927b, p. 108; 1932b, p. 111. — Gee, 1931e, 



p. 33; 1932c, p. 32.— Penney, 1960, p. 41. 

 Spongilla repens Potts, 1880b, p. 357. 

 Heteromeyenia repens Potts, 1887, p. 237. — Kellicott, 1891, p. 103. — Wierzejski, 



1892, p. 142.— Girod, 1899, p. 113.— Weltner, 1895, p. 114.— Smith, 1921, p. 



17; 1930, p. 184.— Kirsch, 1909, p. 37.— Arndt, 1926, p. 344; 1928a, p. 72— 



Schroder, 1927b, p. 75.— Old, 1931, p. 298; 1932b, p. 449.— De Laubenfels, 



1936, p. 36.— JeweU, 1939, p. 17.— Eshleman, 1950, p. 41.— Wurtz, 1950, 



p. 5.— Moore, 1951, p. 63.— Jewell, 1952, p. 451. 

 Heteromeyenia haileyi var. repens Gee, 1931e, p. 47; 1932c, p. 33; 1937, p. 285. — 



Zimmer, 1936, p. 126.— Schroder, 1927b, p. 107; 1938b, p. 127. 

 ? Heteromeyenia repens var. spinulosa Rioja, 1940a, p. 182. — Martinez, 1940, 



p. 191.— Penney, 1960, p. 44. 



Material. — Slides of type of H. haileyi (BM through N. Gist 

 Gee), numerous specimens of H. repens from the United States. 



Description. — Sponge, according to previous descriptions, forming 

 thin encrustation ; surface slightly uneven and distinctly hispid due to 

 projection of skeleton fibers through dermal membrane, oscula 

 inconspicuous. Skeleton forming a rather irregular network, joined 

 together by a small amount of spongin. Consistency of live sponge 

 soft, texture loose. 



Megascleres slender, distinctly fusiform and sharply pointed amphi- 

 oxea, sparsely microspined except in the vicinity of their tips; length 

 range 255-315 p., width range 11-10 p. 



Microscleres delicate, fusiform, and sharply pointed amphioxea, 

 slightly curved to almost straight, spined throughout their length; 



