132 CRESSWELL SHEAEEK, WALTER DE MORGAN, H. M. FUCHS. 



and the arms are shorter as compared with the length of the body. It 

 carries less pigment on the body than escidentus; and, in the early stages, 

 there is often a very regular line of small pigment spots along the 

 ciliated bands. 



A marked preoral lobe overlies the mouth ; and the larva generally 

 presents a peculiar glassy, transparent appearance. 



As the larva develops it retains its elongated form until about the 

 time that the epaulettes appear. The posterior pole then gradvially 

 becomes more rounded, and finally assumes the shape depicted in 

 Fig. 3. 



The time of appearance of the other pairs of arms, epaulettes, 

 Echinus rudiment, etc. was very variable, but on the average did not 

 greatly differ from that of U. escidentus. 



EXTERNAL CHARACTER OF LATE LARVA (FiG. 3). 



The body is wider than deep, and the posterior pole more rounded 

 than in U. eseulentus. 



There are comparatively few pigment spots on the body and arms, 

 and this is generally the case with E. miliaris. Besides this pigment, 

 which is of much the same colour as in U. eseulentus, about the end of 

 the third week, when the epaulettes are forming, a large mass of 

 bright green pigment appears at the base of each. It always makes 

 its first appearance at these points, but afterwards appears in spots on 



Fig. 3. — Larva of E. miliaris 6 x E. miliaris 9. Dorsal view, x 36. 20 days old. 

 ffT.p. — Green pigment. Other lettering as before. 



the arms, and just before metamorphosis is widely diff'used. This 

 green pigment is not found in U. eseulentus. The arms are shorter and 

 more stumpy than in those of U. eseulentus. 



