SUBORDER ALCYONARIA. 647 



SUBGENUS I. PTEROGORGIA. 



Polypis Ufariis. 



Gorgonite with bifarious polyps. 



The polyps of the "Pterogorgise are occasionally in opposite simple 

 series, and the branches are much flattened or winged. In general 

 there is an irregular line or band of polyps on the two sides, separated 

 by a narrow naked space, which is sometimes sulcate. 



Among the Gorgonise the seriate character is imperfectly presented 

 by the G. clathrus, virgulata, and sanguinea. 



Arrangement of the Species. 



I. Branches much flattened or tivo-edged. 



1. G. Pter. quercifolia. *6. G. Pter. acerosa. 



*2. G. Pter. anceps. *7. G. Pter. pinnata. 

 *3. G. Pter. citrina. 8. G. Pter. petechizans. 



4. G. Pter. fasciolaris. 9. G. Pter. patula. 



5. G. Pter. Thomasiensis. 



II. Brandies terete or but slightly compressed. 



A. Ramose in a plane, or pinnate. 



*10. G. Pter. setosa. 15. G. Pter. fusco-purpurea. 



11. G. Pter. turgida. 16. G. Pter. sulcifera. 



12. G. Pter. violacea. *17. G. Pter. pectinata. 

 IS. G. Pter. laxa. 18. G. Pter. ochrostoma. 

 14. G. Pter. rosea. 19. G. Pter. leucostoma. 



B. Not ramose in a plane, or simple. 



*20. G. Pter. sarmentosa. *21. G. Pter. setacea. 



III. Appendix. 

 G. pustulosa. 



I. Brunches com,planate or two-edged, sometimes three to four winged. 



1. G. PTEROGORGIA QUERCIFOLIA. (Ehrenb.) Dana. Bright yellow; 

 eight inches high and four broad, ramulous, complanate, flabellate and 

 lobato-foliaceous, subdivided nearly like the lobations of an oak-leaf, 

 lobes nearly an inch wide ; nerves sterile, other parts polypiferous, 

 oscules small (one-third of a line). 



<!<>rff. quercus folium, Ehrenb., G. Ixxxiv., Gorg. dilatata? Esper, Fortsetz. ii. 25, 

 sp. 5. tab. 51, 56. 



