AMAlxOUClUM NOBDMANNI. 15 



[Amauroucium Nordmanni LOWIG fc KOLLIKKR in Ann. Sci. 



Nat. (3), Zool. V (1846), pp. 217, 221, pi. vii, ff. 42 ; 43; 



KROHN in Arch. f. Anat. 1852, p. 314.] 

 Amourpucium Nordmanni FORBKS & HANLEY Brit. Moll. I 



[1848], p. 15; [KROHN in >Sci. Mem., Nat. Hist. I, 4 



(1853), p. 313]. 

 [Amauroecium Nordmanni BRONX Thier-Reichs, III (1861), 



p. 180.] 



[Amoroudum Nordmanni ANSTED & LATHAM Channel 1*1. 

 ' (1862), p. 219.] 



Colom/ [thick,] sessile, oval or sub-orbicular, broader 

 than high (PI. LIV, fig. 4), of a rosy tint above from 



FIG. 9-i. Amaroucium .Y"<-<7 utmini. About five times natural size. 

 (M. Edwai-ds, pi. i, f. 5 a.) 



the enclosed individuals, paler or yellowish below. 

 Individuals forming several distinctly-circumscribed 

 elliptical or circular systems, in single rows, surround- 

 ing a sub-conical common orifice which is seldom quite 

 central (fig. 94). Branchial aperture very little raised, 

 with six obtuse, whitish lobes (fig. 95), contrasting 

 well with the rose-colour of their base. Thorax rose- 

 coloured. Branchial sac with twelve rows of meshes. 

 Stomach plicated. Post-abdomen short and thick. 



Diameter of mass about an inch and a half (38 mm.). 



Hal. Between tide-marks. 



