REPORT ON THE CRINOIDEA. 301 



Pourtales, sp., and Actinometra blakei, an MS. species of my own, which is the host of 

 Myzostoma areolatum, von Graff. These will all be described and illustrated in my 

 Report on the " Blake " Comatulae, where I hope to work out the relations of Coma- 

 tula cchinoptera, Miiller, to the later described Actinometra meridionalis. 



Actinometra pidchella is also a bidistichate species, while tridistichate series 

 occasionally occur in Actinometra rubiginosa. The unique specimen of Actinometra 

 coppingeri, Bell, has but twelve arms ; and it is therefore not improbable that this 

 species should be referred, like Actinometra rubiginosa, to the ten-armed series, as well 

 as to the tridistichate one. It was obtained by the "Alert" at Flinders, Clairmont. 

 Another specimen dredged by the "Alert" at Port Molle has been referred by Bell to 

 Actinometra cumingi, Mull., sp., which was brought to the Berlin Museum from Malacca. 

 But no member of this group was obtained by the Challenger in the Eastern Archipelago ; 

 and I have not seen more than half a dozen other individual representatives of it in 

 addition to the three already mentioned, although I have visited all the chief continental 

 collections. The type is evidently a rare one in the Eastern Archipelago, although so 

 abundant in the Caribbean Sea and on the Brazilian coast. Most of the species of 

 Actinometra which occur in the Eastern seas belong to the tridistichate type ; and the 

 ten-armed forms are almost exclusively represented by the Solaris-group, which is rich 

 in individuals, though poor in species. But it does not occur at all in the Caribbean 

 Sea where the Echinopt era-group is so extensively developed. 



4. The EcJiinoptera-grouv). 



Actinometra meridionalis (A. Agassiz), Pourtales, sp. (PL IV. figs. 4, a-c ; PL LVI. 

 figs. 1, 2). 



Specific formula — a. — . 



1865. Aleeto meridionalis, A. Agassiz, MS., Seaside Studies, Boston, 1865, p. 121, 



figs. 153, 154. 



1866. Antedon meridionalis, Verrill, Proe. Bost. Soc. Nat. Hist., 1866, vol. x. p. 339. 

 1869. Antedon meridionalis, Pourtales, Bull. Mus. Comp. Zobl., 1869, vol. i. No. 11, p. 355. 



1878. Antedon meridionalis, Pourtales, Ibid., vol. v. No. 9, p. 214. 



1879. Comatida meridionalis, P. H. Carpenter, Trans. Linn. Soc. Lond. (Zool.), ser. 2, 1879, 



vol. ii. pp. 20, 27. 

 1879. Antedon meridionalis, Ratlibun, Traus. Connect. Acad., 1S79, vol. v. p. 157. 



1881. Actinometra meridionalis, P. H. Carpenter, Bull. Mus. Comp. Zobl., 1881, vol. ix. No. 4, 



p. 6. 



1882. Actinometra meridionalis, Ludwig, Mem. Acad. Sci. Bruxelles, 1882, t. xliv. p. 6. 

 1882. Antedon meridionalis, Bell, Proc. ZooL Soc. Lond., 1882, p. 533. 



1882. Actinometra meridionalis, P. H. Carpenter, Ibid., p. 747. 



Locality. — Bahia ; 7 to 20 fathoms. Fourteen specimens. 



Other Localities. — South Carolina ; West of Tortugas, and off French Reef in Florida 



