132 G Canadian Arctic Expedition, 1913-1918 



numerous flake-white dots, sometimes with small white spots at the outer 

 base. Lips and stomodaeum bright red, disk usually convex, yellowish, with 

 faint white radii, and often with white spots surrounding the bases of the 



Fig. 18. Edwardsiella sipunculoides (Stimpson). Transverse section of a perfect mesentery of 

 a specimen from Alaska; b, basal muscle. After Torrey. 



Length of the largest specimens, when in full expansion, about 5 inches 

 (125 mm.); in diameter about 4-5 mm.; when contracted about 36-45 mm. in 

 length. 



Some specimens (No. 108) from near Eastport, at Clark's ledge, differed 

 considerably from the typical ones in colour. Naked parts of the column were 

 clear salmon-colour; no spots on the capitulum, but light lines, due to the mesent- 

 eries; stomoda3um pink; tentacles pale salmon, with a darker salmon-coloured 

 central line; disk salmon-coloured, no spots. Tentacles are about 36, closely 

 crowded in two rows, very slender and pointed in extension; length about t'vice 

 the diameter of the disk, more numerous and more slender than usual in typical 

 specimens of the same size. 



The epidermal coating of the scapus is firm, obscurely 8-grooved, colour 

 dark yellowish brown; length in life about 50 mm.; diameter, 4-5 mm. These 

 were found under a stone in a tide-pool, some were lightly attached to small 

 pebbles by the naked aboral end or physa, probably by adhesive mucous. 



Torrey (op. cit., 1902) has described the structure of this species with good 

 figures. He found as many as 32 small rudimentary mesenteries in a specimen 

 having 25 tentacles (PI. XXVI, fig. 9). They were irregularly arranged; the 

 number between adjacent perfect mesenteries varied from 4-6; one occurred 

 between each pair of directives. 



The muscle pennon on the perfect mesenteries is very thick with branched 

 supports, and is restricted to the inner part of the mesentery. The column has 

 numerous scattered nematocyst capsules, and a very thick mesoglcea in the 

 scapus. 



Common formerly near Eastport, Maine, near Dog island, Clark's ledge, 

 Princes cove, etc., between tides and at low tide mark, and at Grand Manan 

 island, N.B. One small specimen, apparently the young, about 25 mm. long, 

 was taken off Grand Manan in 60 fathoms. Dredged by us in Casco bay, 

 1873, in 48 to 64 fathoms. 



