NEMERTEANS 



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A B 



Fig. 40. Amphiporus schollaerti, n.sp. 

 A, ventral surface of head of preserved 

 specimen; B, dorsal surface. 



Amphiporus schollaerti, n.sp. (Figs. 40, 41). 



A single specimen (N 58) of a large worm was taken at St. 182 in the Schollaert 

 Channel, Palmer Archipelago. The colour as noted in life was pale buff. The preserved 

 specimen was 97 mm. long, and 5-0 mm. broad. 

 It was almost round in section from one end to the 

 other except the head which was blunt and flat 

 (Fig. 40). There was a pore visible at the tip and 

 a larger aperture just ventral to this. Lateral vertical 

 grooves were also present, joining ventrally. The 

 body was slightly dusky at the sides but otherwise 

 colourless. 



The anatomy is similar to A. lecointei with the 

 exception of the proboscis which has fourteen 

 nerves. Head glands, cerebral subepithelial glands 

 are present and the cerebral organs occupy a position 

 between the ganglia and extend behind the dorsal 

 ganglia (Fig. 41). 



The excretory tubules are large and the anterior 

 caecum has forward branches but they are far be- 

 hind the brain. 



I have separated this worm from the other 

 Amphiporids on its size, colour and innervation 

 of the proboscis. The armature was not seen. The 

 specimen was male. 



Amphiporus scoresbyi, n.sp. (Figs. 42, 43). 



Three specimens of this small distinctively 

 shaped species were obtained at St. WS 302 (N 77), 

 the colour note being "orange-yellow to orange- 

 red dorsally and ventrally with very pale yellow 

 periphery and proboscis. Darker pigment in mid- 

 line posteriorly". Two specimens were taken at 

 St. WS 548 and one at St. WS 550. These were of 

 the same size and shape. They had been preserved 

 in formalin and all colour was bleached. 



Form and colour of preserved specimens. The 

 body is fusiform, the length 5-5 mm., diameter of 

 the mid-body 2-0 mm. Its surface is thrown into small rounded eminences which 

 at the anterior end form three or four rows of short fimbriae (Fig. 42). The colour 

 is uniformly yellowish with no sign of eyes or markings. 



Anatomy. The head glands open at the tip of the head just before the proboscis pore. 

 The glands stain deeply with haematoxylin. The thin strands disappear before the 



Fig. 41. 

 Diagram 



Amphiporus schollaerti, n.sp. 



showing the organs at the 

 anterior end of the body. From a graphic 

 reconstruction, co, cerebral organ; csg, 

 cerebral subepithelial glands ; dg, dorsal 

 ganglion; e, eye; hg, head gland. 



7-2 



