490 



BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM 



KEY TO THE SPECIES (FEMALES) 



1. Two or thi-ee horns, very short and stout, at right angles to head ; 



papillae uniform in size and distribution filosa (p. 490) 



Two or three horns, long and soft and pointed backward 2 



2. Head longer than wide, with concave lateral margins ; horns 



parallel with neck; papillae in definite areas only instructa (p. 491) 



Head wider than long, with convex lateral margins; horns diag- 

 onal to the neck; papillae uniformly distributed orthagorisci (p. 492) 



PENNELLA FILOSA (Linnaeus) 



Figure 295, a, 6 



Pennatula filosa Linnaeus, Systema naturae, p. 819, 1758. 



Pennella filosa Wilson, Proc. U. S. Nat. Mus., vol. 53, p. 119, pis. 15-17, 1917. 



Occurrence. — Found with head and neck buried in the flesh of the 

 swordfish, and of the sunfish, captured off Marthas Vineyard. 



Distribution. — Mediterranean (Linnaeus, Ellis, Cuvier, Leigh- 

 Sharpe) ; British Isles (Norman, T. and A. Scott) ; Atlantic coast 



Figure 295. — a, Pennella filosa, female, dorsal ; h, P. filosa, four pairs of 

 legs ; c, P. instructa, female, ventral (o and c drawn by Blake) ; d, P. 

 orthagorisci, female, ventral 



off New Jersey (Leidy, Fowler) ; North Atlantic (Brian) ; Vineyard 

 Sound (M. T. Thompson, Kathbun) ; Nova Scotia (Wilson). 



Color. — Head and neck pale yellow, often with a reddish tinge; 

 trunk dark cinnamon-brown, banded transversely with yellow; egg 



strings dark 

 development. 



orange-yellow, the color becoming deeper with 



