2 BULLETIN OF THE 



sources nearly all the species knowTi to inhabit the Atlantic coast of 

 Nortli America, in deep water, have been derived. The " Challenger " 

 took a few additional species, mostly in still deeper waters, at a greater 

 distance from the coast. The present report includes, therefore, nearly 

 all the Anthozoa hitherto discovered in depths between 100 and 1,200 

 ftithoms, along the Gulf Stream Slope, off the coast extending from South 

 Carolina to Cape Cod. A few well-known, more northern, deep-water spe- 

 cies, like Primnoa reseda and Paragorgia arhorea, not yet known except 

 from the fishing banks, off Nova Scotia and northward, have been 

 omitted, together with other northern forms that inhabit the shallower 

 waters of New England, but extend downward beyond 100 fathoms. 

 Among these are Cerianthiis horealis V., Urticina crassicoriiis, Metridlinn 

 dianthus (marginatum), Bolocera multicornis, Cornulariella modesta, &c. 

 As the writer is about to print * a more detailed and illustrated report 

 on all the Anthozoa of New England and the British Provinces, it was 

 not thought desirable to include such species, when not in the Blake 

 collections. Several West Indian species, mostly new, from the Blake 

 collections of 1877-79, have been included in this report for the purpose 

 of comparison with the northern forms, and more fully to illustrate the 

 characters of the two families, Ceratoisidce and DasygorgidiT, nov., to 

 which most of the southern species referred to belong. West Indian 

 species, belonging to Paramtiricea and Acanthogorgia, are also described 

 for comparison with the related species from our coast. 



ALCYONARIA. 



PENNATULACEA. 

 Pennatula aculeata Danielssen &. Koren. 



Pennafida acnlrata Damelssex, Forliandl. Vidensk.-Selsk., Cliristiania, 1858, p. 25; 

 Fauna Littoralis Norvcgia\ IIL, 1877, p. 80, pi. 11, figs. 8, 9. 

 Verrill, Amer. Jour. Sci., V., 1873, pp. 5, 100; XXIIL, 1882, pp. 310, 315. 

 S.MiTii & Haroer, Trans. Conn. Acad., III., 1870, p. 54. 

 Pennatula phosphorea, vnv. aculeata Sars ; Kolliker, Alcyonarien, I., Pennatulidcn, 



1870, p. 134, pi. 9, fig. 73. 

 Pennatula Canadensis Whiteaves, Ann. & Mag. Nat. Hist., X., 1872, p. o4G. 



Plate I. Figs. 2, 2 a, 



This .species varies considerably in form, according to the state of expansion. 

 The stem is somewhat larger and bulbous at tlie end, ami sometimes the swell- 



* In'the Reports of the U. S. Fish Commission. 



