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



ECHINOIDEA. 



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

 following : 



Echinoneus semilunaris (Gni.) Lam. 



Echinoneus semilunaris Lam., Amm. s. A^ert., p. 19, 1816. A. Agassiz, Revis- 

 Echin., p. 118 (Sjni.), 383 (descr.), 550, pi. xiv, figs. 1-5, pi. xxxviii, fig. 26, 

 1872. 



Echinoneus gibbosus Lam., Anim. s. Vert., \i. 16, 1816. 



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



Echinoneus conformis Desor, op. cit., p. 48, pi. vi, fiigs. 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 Rathbuni Lampert. 

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

 Plate I. Figures 6o, 6b, 7. 



The most interesting holothurian was a large species of Holothwia 

 Avhich 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 cristata, with which it is usually associated. It makes a 

 distinct mound of sand around the mouth of its burroAv, 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 H inches in diameter in the middle. 



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

 end. Its color is usuall}^ gi'ay, pale grayish brown, or purplish brown, 

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

 stained with rusty brown or yellow. 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. Rathlmni Lamp., recently recorded from Ber- 

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

 344, May, 1001). 



