,370 Ver/'ill, IVotes on Radhita, 



Common on all rocky shores and reefs along the Brazilian coast. At Rio, Victoria, 

 Bahia, and elsewhere, where the rocks are gneissose, these sea urchins are foimd in 

 holes in the rocks, which they excavate for themselves. They also excavate the coral 

 reef-rock, and sandstone. — c. f. h. 



EnCOpe emarginata (Leske sp.) Agassiz, Monog. Scut., ii, p. 37, tab. 10. 



Scutella emdryinata Lamarck ; Blainv. ; Desmoul., etc. 

 Echinoglycus frondosus Gray, Catal. Ech. of Brit. Mus., p. 24, 1865. 



The specimens are mostly 3 or 4 inches in diameter, with thin edges. 

 The openings vary considerably in size and the degree of closing at 

 the margin. In most cases all are closed, but often the two posterior 

 remain more or less open. The green and brown colored specimens 

 are about equally common. 



Very common on the sandy beaches in soQie localities along the coast from Rio^ 

 northward to beyond Bahia. One of these localities near the mouth of the Rio Sant- 

 Antonia, in the Province of Bahia, is mentioned in the work of Prinz Max zu Neu 

 Wied. Along the shores of the bay of Bahia, at Itapagipe, Periperi, and elsewhere, it 

 may be coUeeted in great abundance. — C. F. H. 



Order, HOLOTHURIOIDEA. 

 Thyone (Sclerodactyla) Braziliensis Verriii, sp. nov. 

 Plate IV, figure H\ 



Form in contraction oval. The lower side indicated only by the 

 lighter color. Suckers not very numerous, scattered over the whole 

 surface, but somewhat more numeroiis along the ambulacral zones, 

 where there is a tendency to form two rows. Anal orifice armed with 

 five small, calcareous papilhe. Tentacles ten,elongated, arborescently 

 branched, chiefly near the end, tlie divisions short and not very nu- 

 merous ; the two lower tentacles slightly smaller an.d more divided. 

 Plates of the oral circle closely united laterally, forming a very short 

 ring, with ten acute points projecting backward and ten forwai'd, the 

 latter witli wide rounded spaces between them. Distance between 

 the anterior points "1 inch, equal to their length and to the distance 

 from tlie posterior points to the angle between the anterior points. 

 Tentacles somewhat rigid, from tlie abundance of calcareous plates. 

 Color, in alcohol, yellowish gray, Avith fine brownisli spots and an 

 ill-defined dark brown zone along the middle of the interanibulacral 

 spaces. Length of a contracted specimen, in alcohol, 1 -3 inches ; of 

 tentacles 4. Abrolhos Reefs, — C. F. Hartt. 



This species is allied to T. Briarewi, from the Atlantic coast of the 

 United States, but is very distinct in the form of the ring of oral 

 plate, which, in the latter, is relatively about three times longer, and 



