296 



turned inwards, is furnished with so-called denticulate spines. 

 Their form much resembles that of the corresponding spines of 

 C. minuta — but they are broader in the last-named species. And 

 whereas this latter species shows only three rows of six of these 

 spines on each joint, C. japonica has fronu 8 — 11 spines in each 

 of the three rows; the part of the surface occupied by them in 

 C. japonica seems greater than is the case in C minuta. 



The legs are very slender. The length of the joints is much 

 the same as in C. minuta. There is only some diflerence in the 

 proportions of the last two joints and the claw ; joint seven being 

 about once and a half as long as eight, whereas the claw is 

 cousiderably shorter than one half the length of the eighth joint. 



The only specimen taken at Station 237 is a male, as far as 

 1 can make out. I do not feel sure however that it is quite a 

 full-grown specimen. 



4. Pyenogonuiii niagellaiiicum , n. sp. 



(Fig. 20 and 21). 



Near the eastern entrance of Strait Magellan (at Station 313) 

 a specimen of a species of Pycnogonum was taken during the 

 cruise of the Challenger , which has not been observed — or at 

 least described — hitherto. 



Though far from certain it is possible, that the same species 

 has been observed on the coast of Chili. In Gay's Historia fisica 

 y politica de Chili, Zool. III, p. 308, Nicolet describes a species 

 of Pycnogonum from that coast which he considers to belong to 

 P. littorale, Ström. I quite agree with Ives *) that it is very 

 questionable whether this determination will prove exact: if 

 the species of Nicolet is not P. littorale, it may be P. magella- 

 nicum. 



The only specimen of this species which was collected by the 

 Challenger is a female without ovigerous legs. It is a typical 



1) Ive9, J. E., A new species of Pycnogonum from California. Proceed. Acad. of Nat. 

 Science of Philadelphia. 1892. P. 142—144. PI. X. 



