PYCNOGONIDS 



28 5 



than the first. First tarsal joint very small, triangular, terminating dor- 

 sally as a small lappet, and slightly convex ventrally, where it is beset 

 with a few slender bristles. Second tarsal joint beset with short spiniform 

 bristles; the ventral ('inner') side is somewhat lamellarly expanded at 

 the base, and is here armed usually with 6 strong, anteriorly curving 

 spines, the 2 distal ones in most cases being in juxtaposition. Claw 

 powerful, slightly curved, about half as long as ts.z ; aux. cL very small, 

 though distinctly developed. At the distal end of f. are i or 2 strong 

 bristles, and another projects from a slight depression on the dorsal side 

 of 2, a short distance from its distal end. 



SPECIMENS EXAMINED. 



Distribution. If all the synonyms given above properly belong to 

 this species its distribution covers a great range. It has been found 

 along the coasts of the British Isles, Holland, Denmark, Norway, Green- 

 land, the eastern coast of North America as far south as Massachusetts, 

 and the present record extends its range to the western coast of North 

 America from Orca to Unalaska. It ranges in depth from the shore 

 rocks to 100 fathoms (Sars). Apparently it is a truly circumpolar 

 species. 



Remarks. The specimens which I have examined from the Alaska 

 coast agree very closely with the excellent description of this species 

 given by Sars. They are, however, most of them considerably larger, the 

 smallest specimen, from Orca, measuring about 3.5 mm., those collected 

 at Popof Island 4.5 mm. to 5 mm., and those from Dutch Harbor 5.5 

 mm. from the tip of the proboscis to the tip of the caudal segment. Sars 

 describes the color as " a more or less vivid red," or " sometimes dark- 

 brownish or a sepia tint." Most of the Alaska specimens (alcoholic) are 

 lighter than this, especially those from Dutch Harbor, which are a light 

 brown or yellowish ; the specimens from the Shumagins are a darker 

 brown, and in 2 or 3 of them the branches of the intestine in the legs 



1 " Undershore rocks." 



