Arenicola glacialis 



113 



The original specimens were sent recently to tlie writer, 

 who has shown that A. glacialis is a distinct species, and has 

 given the first description of its more important features. 



-Pp. 



Not'.-- 



CE.Gl.- --- 



D.V. 



Fig. 47. — A. glacialis. Diagram of a dissection of the 

 anterior portion. Br'. First gill ; D.V. Dorsal blood- 

 vessel ; H. Heart ; Not'. First notopodium ; Nph>. 

 First nephridiuni ; (E.Gl. (Esophageal gland ; PR. 

 Prostoniium ; S>. First septum ; S.P. Septal pouch. 



Eemaeks on the Type Specimens. — Of the five original examples 

 only one is complete, another is in two parts held together by a 

 strand of muscle, the other three are in pieces. All are dark 

 brown or nearly black in coloiu-. The complete specimen, shown 



I 



