252 BULLETIN OF THE BUREAU OF FISHERIES. 



Alcyonidium verrilli, new name. [PI. xxvin, fig. 75, 753, ^b, 750, pi. xxxi, fig. 92, 923.] 



Verrill 1872. p. 289 (Alcyonidium ramosum, n. sp.). 

 Verrill and Smith 1874, p. 708 (Alcyonidium ramosum'). 



In naming this species Prof. Verrill overlooked the fact that Lamouroux (Encyclopedic Metho- 

 dique, t. xiv, p. 40) had already applied the name to another species in this genus. As the present 

 species is very evidently not the ramosum of Lamouroux, a new name is required, and I have the pleasure 

 of dedicating it to Prof. Addison E. Verrill, who first described it and whose name is so intimately 

 connected with the pioneer work on the Bryozoa of our coast. 



" Much branched, when full grown; the branches round, irregularly dichotomous, usually crooked. 

 Surface glabrous, smooth, or nearly so, the cells rather small and crowded, their margins not elevated; 

 zooids with 16 slender tentacles. Color ashy brown, or dull rusty brown. We have often found arbo- 

 rescently branched specimens 12 to 15 inches high, with smooth, cylindrical branches about a third of 

 an inch in diameter." 



To the above description by Verrill may be added the following: The branches are not infrequently 

 much flattened, especially at the tips, and the larger branches are often hollow. The texture is firm, 

 and in alcoholic specimens rather brittle. From A . gelatinosum, the only species with which it is likely 

 to be confused, it is distinguished by the firmer structure, by greater opacity, by the size of the cells, 

 which are somewhat larger and more crowded, and by the number of tentacles. The statement by 

 Verrill and Smith (I.e.) that the height is " . 2 50 mm. to .3 50 mm ." is a typographical error for 2 50 to 3 50 mm . 



Verrill records the species from New Jersey to Vineyard Sound. It is not at all common in Vineyard 

 Sound, and occurs, so far as I have observed, only at the extreme western end of the Sound, where only 

 small specimens a few inches in height were taken. The finest examples I have seen were given me 

 by Prof. Verrill from Long Island Sound. 



Alcyonidium gelatinosum (Linne). [PI. xxvm, fig. 76.] 



Linne 1766-8, p. 1293 (Alcyonium gelatinosum). 

 Verrill and Smith 1874, p. 709. 

 Verrill, 18790, p. 28. 



There is considerable doubt as to the occurrence of this species in the Woods Hole region. Verrill 

 and Smith recorded it questionably; "a few small specimens, apparently belonging to this species, 

 were dredged in the deeper parts of Vineyard Sound, ' ' and later collecting has not revealed its presence. 



Zoarium erect, branching or simple, the branches subcylindrical or slightly flattened, yellowish 

 or greenish yellow in color, the softest and most pellucid of the genus. Zooecia small, and rather closely 

 packed, their orifices marked by low papillae, the tentacles about 15 to 17. 



Alcyonidium hirsutum (Fleming). [PI. xxviii, fig. 77.] 



Fleming 1828, p. 517 (Alcyonium hirsutum). 

 Verrill and Smith 1874, p. 708. 

 Verrill, 18790, p. 28. 



Zoarium of rather firm consistency, encrusting, or erect, compressed, expanded, palmate, much 

 and variously divided, of a yellowish brown color; surface thickly covered with tall imperforate papilla?, 

 among which the slightly prominent orifices are placed. Reaches a height of 5 or 6 inches. More 

 commonly grows as a rather thick crust spreading over algae, etc. 



Verrill has recorded this species from Vineyard Sound, but it has not made its appearance in the 

 collections of our survey. 



The Akyonidium? pellucidum of Leidy (1855, p. 142) is an Amouroucium. 



Family CYLINDR(ECID Hincks, 1880. 



Stolonate, the zooecia arising singly, and broadly continuous with the stolon (Cylindraecium); 

 or somewhat palmately branched, erect portions bear the zooecia, which are cylindrical and broadly 

 continuous with each other (Anguinella). Only the latter genus has been observed in this region, but 

 Cylindracium is found abundantly at Beaufort, N. C., and may be looked for at Woods Hole. 



