Boone, Echinodermat a, Cruises of "Eagle" and "Ara," 1921-28 157 



Distribution : This species is known from the west coast of Mexico 

 and the Galapagos Islands. 



Material examined: Ten specimens, collected in tide-pool, Hood 

 Island, Galapagos Islands, February, 1928, by the "Ara" expedi- 

 tion, Cat. no. 286. 



Discussion: The spicules in the "Ara" specimen are poor, owing 

 to partial corrosion. I am indebted to Dr. H. L. Clark and Dr. 

 Elizabeth Deichmann of the Museum of Comparative Zoology for the 

 examination of one of these specimens. In the retracted condition, 

 this holothurian has a body length of 15 cm. Mr. Belanske, staff artist 

 of the expedition, noted that the animal is a dusky reddish-brownish 

 color when alive. 



References: Stichopus kefersteinii Selenka, Zeit. f. w. Zool. Bd., 

 XVII, p. 318, pi. XVIII, figs. 37-40, 1867. 



Holothuria tubulosa Gmelin. 

 Plate 100. 



Type-. Gmelin 's type material came from the Mediterranean and 

 Adriatic Seas. 



Distribution : This is a typical Mediterranean species, which is also 

 found on the Atlantic coasts of the Hispanic Peninsula and of France, 

 also in the Bay of Biscay. Bathymetric occurrence: shallow water 

 to 19 fms. 



Material examined: Three specimens, dredged in 19 fms., on 

 grassy bottom, ten miles south of Cagliari, Sardinia, July 23, 1927, 

 by the "Ara," Cat. no. 281, Cat. no. 282. 



Color: The living animal is on the dorsal side more or less dark 

 maroon, reddish brown, or violaceous brown ; with the ventral side 

 correspondingly lighter. The tips of the tentacles are never white. 



Technical description: The body of this species is quite large, 

 attaining a length of 20 to 30 cm. with a corresponding width of 5 to 

 6 cm. The skin is very thick, rather tough, with numerous well-devel- 

 oped deposits of several forms. The dorsal region has several conical 

 tubercles of different sizes ; these are scattered and each terminates in 

 a small elongated papilla. The ventral surface has several closely 

 crowded, irregularly placed pedicels. The first kind of calcareous 

 deposits are small, perforate, turriform tables whose basal part has a 

 rough, spiny surface, and whose spire ends in several points 

 (fig. A). The most numerous type of deposit is that shown in figure 



