A. E. Verrill — Additions to the Fauna of the Bermudas. 37 



ECHINOIDEA. 



The most interesting species of this group, taken this year, is the 

 following : 



Echinoneus semilunaris (Gm.) Lam. 



Echinoneus semilunaris Lam., Anim. s. Vert., p. 19, 1816. A. Agassiz, Revis- 

 Echin., p. 118 (Syii.), 333 (descr.), 550, pi. xiv, figs. 1-5, pi. xxxviii, fig. 26, 

 1872. 



Echinoneus gibbosus Lam., Anim. s. Vert., p. 16, 1816. 



Echinoneus eleyans Desor, in Agassiz, Mon. Echin., p. 47, pi. vi, figs. 4-6, 1842. 



Echinoneus conformis Desor, op. cit., p. 48, pi. vi, figs. 11-21, 1842. 



This interesting species appears not to have been obtained there 

 for many years, though it was recorded by Mr. A. Agassiz. Two 

 living specimens were taken at Hungry Bay in March, by A. H. 

 Verrill. They were found buried in sand and gravel, under stones, 

 in small tide-pools, at extreme low-tide. Their color in life was 

 purplish red or bright copper-red. 



HOLOTHURIOIDEA. 



Holothuria Mathbuni Lampert. 

 Holothuria, sp., Rathbun, these Trans., v, p. 141, 1879. (Description.) 



Plate I. Figures 6a, 66, 7. 



The most interesting holothurian was a large species of Holothuria 

 which has the habit, unusual in this genus, of burrowing deeply in 

 the sand at and below low-tide mark on the sand flats, much like the 

 Arenicola crislata, with which it is usually associated. It makes a 

 distinct mound of sand around the mouth of its burrow, which runs 

 obliquely downward, often to the depth of two feet or more. 



This holothurian itself, when expanded, was often 18 to 20 inches 

 long and 1 inch to 1^ inches in diameter in the middle. 



It is usually long-fusiform in extension, tapering gradually to each 

 end. Its color is usually gray, pale grayish brown, or purplish brown, 

 with irregular rows of roundish brown or purplish spots. It is often 

 stained with rusty brown or j^ellow. The surface is papillose, and 

 the integument is firm and tough. 



This was not uncommon on the flats exposed at low-tide at Long 

 Bird Island, and other similar localities. A single specimen was in 

 Mr. Goode's collection of 1876, without special locality. 



This is probably H. RatJibuni Lamp., recently recorded from Ber- 

 muda by Mr. H. L. Clark (Proc. Boston Soc. N. Hist., xxix, pp. 343, 

 344, May, 1901). 



