FISHERY BULLETIN: VOL. 74, NO. 4 



Halcampa duodecimcirrata M. Sars 1851 



OCCURRENCE.-43°10'N, 70°25'W, 64 m, till, 1 

 specimen. 



GENERAL CHARACTERISTICS.-They agree 

 with earlier descriptions of the species (cf. Carl- 



gren 1893). The reddish scapus is provided with 

 tenaculi and distinct mesenterial insertions shim- 

 mering through the ectoderm. The six pairs of 

 macrocnemes (Figure 3A) (including two pairs of 

 directives) have strongly developed, circum- 

 scribed, and reniform retractors (Figure 3B). The 

 parietal muscles are provided with a rather small 



100 



mgl pm 



Figure 3.-Hakampa duodecimcirrata. A. Section through a macrocneme. B. Cross section of a retractor. C. 

 Section through the peripheral part of a mesentery (the ectoderm is omitted in the figure), mgl-mesogloea, mgl 

 pm— mesogloeal lamella of parietal muscle, ooc— oocyte, pm— parietal muscle, retr ent— entoderm of retractor 

 muscle. 



862 



