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PENNATtTLID^. 



rather large, arranged in three alternating rows along the edges of 

 the pinnae. Axis very slender, about 2 inches long, extending from 

 about an inch above the basal end to about the middle of the pinnate 

 portion. The naked base of a specimen 4^ inches is 1| inch, the 

 largest pinnae f inch long and 1-i wide ; 25 pinnae on each side. 

 Hah. California, Pinsacote Bay (Stone). 



** Rachis stnooth behind. 



12. ARGENTELLA. 



Coral elongate. Pinnules numerous (40 to 70), short, broad, one- 

 fourth of a circle, supported by spines radiating from the base. 

 Polypes in unequal series. Eachis smooth behind. 

 Pteroeides, sp., HerMots, Not. p. 



27. Argentella elegans. 



Pinnules 41 ; stem one-fifth of the entire length ; apex naked. 



Pteroeides elegans, Herklots, Not. p. 20, t. 6. f. 2 : Gray, Ann. Sr Mag. 

 Nat. Hist. 1860, v. p. 22. 



Hah. Indian Ocean. 



28. Argentella grandis. B.M. 



Pinnules 70 ; stem one-half the entire length. 



Sagitta marina, Rwnph. 



Pennatula grandis, Pallas, Zooph. pp. 366, n. 213 ; Cuvier, R. A. iii. 



p. 318 ; Blainv. Man. (VAct. p. 517. 

 Pennatula argentea, Ellis 8f Soland. p. 66, t. 8. f. 1, 3 ; Esper, Pflanz. 



iii. p. 94, t. 8 (cop. EllisS ; Lamk. A. s. V. ed. 2. ii. p. 641 ; Ctivier, 



R. A. iii. p. 318 ; Ekrenb. Corall. r. M. 

 Pennatula elongata, Blainv. Man. dAct. p. 517 ; Dana, Zooph. p. 596. 

 Pteroeides grande, Herklots, Not. p. 21, t. 6. f. 1. 

 Pteroeides grandis, Grai/, Ann. ^- 3Iag. Nat. Hist. 1860, v. p. 22. 



Hah. Indian Ocean {B. M., in spirits, the specimens figured by 

 Ellis, marked ^'■Pennatula argent ea"). 



Pennatula grandis, Ehrenb. Cor. r. M. ; Herklots, Not. p. 22. 

 Two feet long; the pianate part Ig foot long. The pinnules elon- 

 gate near the end, small at the base, very far apart and imbricate ; 

 the naked part of the base is unciaated. Mus. Berlin : an old speci- 

 men without habitat, remarkable for the slenderness of the naked 

 part. 



29. Argentella Jukesii. B.M. 

 Feather oblong, broad. Pinnules short, broad, subtrigonal, rounded, 



only attached by the narrow base. Stem elongate, as long as the 

 feather, thick ; upper part, near the pinnae, swoUen. 



Pteroeides Jukesii, Gray, Ann. ^ Mag. Nat. Hist. 1860, v. p. 22. 

 Hah. Australia, Port Bowen. 



a, h. In spirits. Port Bowen, Australia, Presented by J. B. Jukes, 

 Esq. 



