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CLARK 



tions have visited the islands, little attention was given to the 

 shallow-water fauna. The Hassler expedition collected a few 

 species in 1872, and the Albatross visited the islands in 1888, 

 and again in 1891. Most of the latter's collecting, however, 

 was with dredge or trawl in deep water. References to the 

 marine fauna of the islands are comparatively few, and are 

 widely scattered in the literature of marine zoology, but it ap- 

 pears that up to the present time 3 species of crinoids {Cala- 

 mocrinus diomedecB A. Ag., Antedon agassizii Hartlaub, and 

 Antedon bigradata Hartlaub, all collected by the Albatross in 

 deep water), 5 species of Asteroids, 8 of Ophiuroids, 12 of 

 Echinoids and 3 of Holothurians have been reported from the 

 Galapagos. It is probable that of these 31 species, not less 

 than 7 are incorrectly reported or are not valid species. The 

 Hopkins Stanford collection contains 146 specimens, represent- 

 ing 24 species ; 9 Asteroids, 4 Ophiuroids, 8 Echinoids and 

 3 Holothurians. Of these, 7 star fishes, i brittle star, 3 sea 

 urchins and i holothurian, 12 species in all, were not previously 

 known from the islands, so that the Hopkins Stanford Expedi- 

 tion has increased our knowledge of Galapagos echinoderms at 

 least 50 percent. 



In the following pages special note is made of any peculiari- 

 ties of size, color or other characters, in which the Galapagos 

 specimens differ from those from other localities. The pre- 

 viously known geographical range of each species is also added, 

 to show how much that range has been extended by their oc- 

 currence at the Galapagos. For the pleasure of examining 

 the collection, I am indebted to Mr. R. E. Snodgrass, by whom 



it was sent to me. 



ASTEROIDEA. 

 Luidia bellonae Lvitken. 



There is a single dry and much broken specimen of a Luidia from 

 Tagus Cove, which answers well to the description of this species, ex- 

 cept that the paxillse have more than twelve papillae. The ray is 100 

 mm. long, and the color dull yellow marked above with olive green 

 much as in Z. alternata. The species has been previously reported 

 from Panama, Guayaquil and Callao. 



Luidia columbiae (Gray). 



There are two large dry specimens of a Luidia from Tagus Cove. 



