APODA. 347 
STERNASPIS, Otto. 
Where, in addition to the setz of the Echiuri, we observe ante- 
riorly a slightly corneous disk surrounded with cilia(1). 
(1) Thalassema scutatum, Ranzan., Dec. I, pl. 1, f. 10—~12, or Sternaspis thalas- 
semozdes, Otto, Monog. ; 
A late examination of the Thalassemz has proved to me that this is their proper 
place. 
