WIDERSTEN: ANTHOZOA FROM EASTERN COAST OF UNITED STATES 



67°06'W, 366 m, 3 specimens; 42°48'N, 69°39'W, 183 

 m, 1 specimen; 43° 17'N, 70°24'W, 46 m, 1 specimen; 

 43°19'N, 67°16'W, 201 m, 1 specimen; 43°20'N, 

 68°45'W, 119 m, 1 specimen. 



GENERAL CHARACTERISTICS.-The struc- 

 ture of the specimens agrees with earlier descrip- 

 tions of the species (cf. Carlgren 1891:242, 1893:50; 

 Stephenson 1935:130; Verrill 1922:G 115). 



NEMATOCYSTS.-Co??nH»:basitrichsl6 x 2.2 

 - 21 X 2.7, 33 X 3.3 - 41 x 3.8 (-63 x 5.5). 

 Tentacles: hsisitrichs 21 x 2.7-36.5 x 3.3-3.8,52 x 

 3.8 - 87 X 4.9-6.5 (most often 60-70 x 4.5-6); 

 spirocysts 31-74 x 3.3-5.5; Actinopharynx: basi- 

 trichs 50 x 4.4 - 79 x 5.5; microbasic p- 

 mastigophors 23-33 x 5.5 Filaments: basitrichs 

 20-22 X 2.7-3.8, 50 x 3.8 - 74 x 4.4-5.5; microbasic 

 /)-mastigophors 19.6 x 4.9 - 35.4 x 5.5 jum. 



Tealia crassicornis (Miiller 1776) 



OCCURRENCE. -41°02'N, 69°00'W, 80 m, 

 gravelly sand, 1 specimen; 41°13'N, 68°58'W, 102 

 m, gravelly sand, 3 specimens; 41°33'N, 69°47'W, 

 27 m, gravelly sand, 1 specimen; 4r50'N, 67°56'W, 

 51 m, sand, 3 specimens; 42°11'N, 65°56'W, 229 m, 

 gravel, 1 specimen; 42°25'N, 66°05'W, 249 m, 

 gravel, 1 specimen; 42°26'N, 67°02'W, 366 m, 2 

 specimens; 43°11'N, 66°31'W, 92 m, gravel, 3 

 specimens; 43°11'N, 67°05'W, 181 m, 1 specimen; 

 43°12'N, 65°33'W, 73 m, shelly sand, 1 specimen; 

 43°33'N, 69°35'W, 159 m, 1 specimen; 43°37'N, 

 68°12'W, 198 m, 1 specimen; 43°49'N, 68°31'W, 95 

 m, 2 specimens; 43°52'N, 66°42'W, 102 m, 2 

 specimens; 43°53'N, 68°38'W, 91 m, 1 specimen; 

 44°26'N, 67°28'W, 73 m, till, 1 specimen; 44°30'N, 

 66°30'W, 157 m, 1 specimen. 



GENERAL CHARACTERISTICS.-The mor- 

 phology of the studied specimens agrees with 

 earlier descriptions of the species (cf. Verrill 1867; 

 Carlgren 1893). The pedal disc is wide, circular 

 (diameter = 16-114 mm) or oval (16 x 22 - 47 x 

 63 mm). The rather firm column is in the contract- 

 ed state, cylindrical to semispherical, 14-38 mm 

 high. In those cases where the column is provided 

 with verrucae, these are chiefly spread over the 

 distal parts of the column. In some specimens 

 there is a distinct annulus with 48 marginal 

 verrucae. The number of mesenteries is somewhat 

 larger proximally than distally (in a specimen with 

 68 mesenteries only four were limited to the 



proximal part of the column). The two outer of the 

 four to five mesenterial cycles are often not quite 

 completed. With the exception of the youngest, 

 proximally located cycle, and the 10 oldest perfect 

 pairs, the mesenteries are fertile. In the specimens 

 coming from 43°11'N, 66°31'W, the entodermal 

 and circumscribed sphincter is obviously asymme- 

 tric, with one half of it considerably more strongly 

 developed than the other. 



Many of the specimens in the collection are 

 viviparous with larvae and young stages equipped 

 with tentacles lying in the proximal part of the 

 gastrocoele. 



NEMATOCYSTS.-Co/hw/c basitrichs 5.5 x 1.1 

 - 9 X 2.7. 18 X 2.2 - 27 x 2.7-3.3; in larger 

 specimens found in the deeper localities: 12.5-14 x 

 2.7, 23-37 X 3.8, 79 x 5.5 - 83.4 x 8.2; spirocysts 22 

 X 2.7 - 69 x 4.4. Tentacles: basitrichs 10-14 x 

 2.2-2.7, 20 X 1.6 - 36.5 x 2.7-3.8; spirocysts 17.4 x 

 2.7 - 71 X 4.9-5.5. Actinopharnyx: basitrichs 49 x 

 5.5-6 - 91 X 6-7.1, 12 x 1.6 - 26 x 2.7; microbasic 

 p-mastigophors 23 x 4.9 - 30 x 5.5-6.5; spirocysts 

 (rare) 28-41 x 3.8. F(7a»ie«^s: basitrichs 11 x 2.2- 

 34 X 2.7, 49 X 5.5-6 - 68 x 7.1; microbasic 

 p-mastigophors 20 x 4.9 - 41 x 6.5 jum. 



Actinostolidae 



Actinostola callosa (Verrill 1882) 



OCCURRENCE.-42°10'N, 69°57'W, 142 m, 1 

 specimen; 42°11'N, 68°16'W, 198 m, 1 specimen; 

 42°21'N, 68°02'W, 190 m, 3 specimens; 42°26'N, 

 66°35'W, 302 m, 1 specimen; 42°27'N, 66°08'W, 247 

 m, gravel, 1 specimen; 42°51'N, 65°12'W, 159 m, 1 

 specimen; 42°54'N, 69°35'W, 159 m, 2 specimens; 

 43°21'N, 69°57'W, 155 m, 1 specimen; 44°41'N, 

 66°14'W, 134 m, till, 1 specimen. 



GENERAL CHARACTERISTICS.-The mor- 

 phology of this species has been carefully de- 

 scribed by Carlgren (1893:71). The length of the 

 column varies between 13 and 196 mm, and the 

 diameter of the pedal disc is 13-48 mm. The 

 tentacles are arranged in six cycles (6-1-6-1- 12 -(- 

 24-1-48-1- 96). The mesenteries (in five or six cycles) 

 are arranged according to the Actinostola rule. 

 Twenty-four pairs of mesenteries are perfect, 

 those of the two inner cycles (including the two 

 directive pairs) being sterile, as well as those of the 

 outer cycle. 



865 



