282 THE VOYAGE OF H.M.S. CHALLENGER. 



Primnoella, Gray. 



The species of this genus are found extending along the shores of America, from 

 Sombrero Island on the north-east of South America {Primnoella distans, Std.), and 

 Pernambuco, Monte Video {Primnoella magellanica, Std., and Primnoella murrayi), 

 southwards to Tom Bay, Patagonia {Priynnoella fiagellum, Std.), and up the west coast 

 of South America as far as the coast of Chili {Primnoella hiserialis). Two species 

 extend to Australia, Primnoella grandisquamis and Primnoella australasi^, Gray, 

 being found at Port Jackson and at Twofold Bay. 



Primnoa, Lamouroux. 



The type species, Primnoa reseda, L., seems limited to the Atlantic Ocean, where it is 

 found from the Cape de Verdes to the Polar Sea; it has been dredged in deep water oflF 

 Setubal, at St. George's Bank, and in the Bay of Fundy. 



Primnoides, Wright and Studer. 



The only known species of this genus {Primnoides sertularoides) was found otf Prince 

 Edward Island in the Southern Ocean. 



Family IV. M u R i c E i D ^. 



Acanthogorgia, Gra_y. 



With one exception the species of this genus are found in the Atlantic Ocean. 



The following species are found north of the equator — Acanthogorgia hirsuta, Gray, 

 Madeira ; Acanthogorgia armata, Yen:, off Nova Scotia ; Acanthogorgia aspera, Pourt., 

 Havanna; Acanthogorgia schrammi (D. and M.), Guadeloupe; and Acanthogorgia 

 muricata, Verr., Barbados. While the following species found during the Challenger 

 Expedition occur south of the equator — Aca7ithogorgia ridleyi and Acanthogorgia laxa, 

 Patagonia; Acanthogorgia ramosissima trends further to the east, being found off 

 Prince Edward Island, in the Southern Ocean. The only species from the Pacific Ocean, 

 Acanthogorgia longijlora, was taken off the Philippines. 



Pararfiuricea, Kolliker. 



The species of this genus are principally to be found in the Atlantic Ocean, but 

 extend as far in an eastern direction as the western shores of Australia. Paramuricea 



