Nymplion from the North Pacific. 207 



•wards, wliicli are, more strictly speaking, Antarctic or 

 Subantarctic, the species of Nynrphon from the Pacific are 

 six in number. 



It is tlierefore of interest tliat another slionld be added to 

 tliis short list; more esf)ecially as it comes from a region — 

 tlie west coast o£ North America — where, though many 

 genera of Pycnogonida have been found, no single Nymphon 

 has been recorded. 



Nymphon pixelJce, sp. n. (PI. VII.) 



About ten specimens were collected by Miss H. L. M. 

 Pixell, B.Sc, at Departure Bay, Vancouver Island, in the 

 summer of 1911. In life, its colour is salmon-pink. 



The hody is slender, with well-developed, widely separate, 

 lateral processes. Segmentation is distinct, and from the 

 middle of each segment springs the lateral process (fig. 1). 



The head and proboscis are equal in length to trunk. The 

 neck is slender, cylindrical, expanded in front and marked 

 by a slight median groove. The ocidar tubercle (figs. 2 & 3) 

 is very high and conical, slightly depressed anteriorly, 

 directed slightly backwards; near the base are four well- 

 developed lenses. Beneath it ventrally on neck are developed 

 body-processes from which the ovigerous legs arise (fig. 6). 



The proboscis is cylindrical and very slightly shorter than 

 the cephalic segment. Distinctly articulated with the last 

 body-segment and directed slightly upwards is the abdomen 

 (fig. 2). 



The length of the body is 8 mm., and of the trunk alone 

 4 mm. 



The chelifers are slender, with the hand longer than the 

 scape, and slightly curved. The chelee are long and narrow 

 (fig. 10). The palm is about equal in length to the fingers. 

 The immovable finger bears an even row of very powerful 

 curved teeth. The movable finger is likewise armed 

 with teeth, which are double the number of those of the 

 immovable finger, and are straight and lanceolate. Seta3 are 

 few and scattered. 



The palps have the normal five joints and are slender; 

 except on the fourth and fifth joints, setse are almost absent. 

 The first joint is very short ; the others are in the proportion 

 of 14 : 15 : 11 : 11 (fig. 9). 



The ovigers are ten-jointed, and arise, as aforesaid, from 

 two processes in the ventral surface of the neck. The first 

 three joints are short and stout, with no setse; together they 



