384 Ven-ill, JVotes on Radiata. 



are two or three cells. The lower fourth of the sheath is dilated to 

 about three times the thickness of the rest of the stem. 



Length 19 inches; diameter of the naked stem -03 in. ; smallest di- 

 ameter of stem, with the sheath, '04 in. ; diameter of expanded l)ase 

 •13 in.; length of largest lobes 'lb inch. 



Locality, Bay of Monterey, 20 fathoms. Collected by Dr. J. G. 

 Cooper, of the State Geological Survey. 



This species can be at once distinguished from V. elongata G. 

 (Proc. Cal. A. N". S., vol. ii, p. 167) by its more slender form, its pro- 

 portionally large polypiferous lobes, its cylindrical stem, Avithout any 

 grooves, and the comparatively smaller portion of the stem bearing 

 the lobes." 



Stylatnla elongata Verriu. 



Bulletin Museum Comp. Zoology, p. 30, 1864. 

 Virjularia elongata Gabb, Proc. Cal. Acad. Nat. Sci., ii, p. 167, 1863. 



This species is larger and stouter than the preceding. The pinnae 

 are broader and more overlapping, leaving a naked space between the 

 lateral rows for only a short distance from the base. In the middle 

 twenty of the lateral wings, on each side, occupy an inch. The spines 

 are larger and less numerous. 



Near San Francisco, Cal. — A. Agassiz. 



Sub-Order, GORGONACEA. 



Family, Gorgonid^. 



Gorgonia. 



This genus, which formerly included the entire sub-order, has l>een 

 repeatedly restricted to narrower limits by successive authors, until 

 in the work of Milne Edwards and Haime* it is limited to those spe- 

 cies allied to G. verrucosa of the Mediterranean. Yet even they, as 

 it now appears, united with it some speciesf allied to Muricea, etc. 

 Dr. Alljert Kolliker, who in a recent workj has very thoroughly in- 

 vestigated the microscopic structure of the Alcyonaria, reunites with 

 Gorgonia several of the genera established by Milne Edwards, Valen- 

 ciennes, and others, viz : Rhipidogorgia, Pterogorgia, Xiphigorgia^ 

 Hymenogorgm, Phgllogorgia, Phycogorgia, Leptogorgia, Lophogor- 

 gia, and part of Gorgonella. As thus enlarged, the genus Gorgonia 

 of Kolliker includes all the Gorgonidse having a horny axis andj^hin 

 coenenohyma, with small and simple spicula. 



* Histoire naturelle des Coralliaires, 1857, vol. 1, p. 157. 

 f Muricea vatricosa KolL, Tfiesea exserta D. & M., Echinoijorgia arida, etc. 

 J Icones Histiologicaj, oder Atlas der vergleiclienden Gewebelehre, ii, Leipzig, 1866, 

 • 4to, with xix plates. 



