632 ME. G. H. CAEPENTEE 0]S" 



E. 32) an approacTi to the allied C. spinosissimum, ISTorman 

 ((7. spinosiim, Gr. 0. Sars), is to be noted in the greater propor- 

 tional length of the auxiliary claws and the more slender 

 mandibles. 



O. Mrtipes is one of the most familiar of Arctic pycnogons ; 

 and from the numerous localities at which it has been dredged, 

 it would appear to have a complete circumpolar range. On the 

 North American coast it goes south as far as Massachusetts, 

 Of the depth at which it is found there are records rarying 

 from 25 to 300 fathoms. 



There can be little doubt that this is the species recorded by 

 Heller and Miers from. Franz-Josef Land as Nymphon hirtum } 

 the true C. Mrtum (Kroyer) being a more southern form,, 

 inhabiting the British, Norwegian, and Icelandic seas. 



Ch-^tontmphon maceontx ( G. 0. Sars). 



(Larva, PI. 46. figs. 14-16.) 



E. 13. 77" 55' N. lat., 55° 25' E. long. ; 115 fms. 8 July, 1897. 

 2 males. 



E. 14. 77° 55' N. lat., 55° 25' E. long. ; 115 fms. 8 July, 1897. 

 1 female. 



E. 15. 77° 55' N. lat., 53° 20' E. long. ; 130 fms. 10 July, 1897. 

 1 immature male. 



E. 16. 77° 55' N. lat., 53° 20' E. long. ; 130 fms. 10 July, 1897. 

 1 male. 



E. 18. 77° 55' N. lat., 50° 20' E. long. ; 130 fms. (brown mud). 

 10 July 1897. 1 male. 



This beautiful species has a wide range, from the Faroe 

 Channel to the coasts of Spitzbergen (lat. 80° N.) and the Kara 

 Sea ; it is recorded by Sars at depths varying from 148 to 870 

 fathoms. The structure of this pycuogon is exceedingly cha- 

 racteristic, and these specimens agree closely with the figures 

 given by Sars (4) and Hoek (3). One of the males (E. 16) 

 carries egg-masses, while another (E. 13) bears a number of 

 larvse with two pairs of legs and a rudimentary third pair. From 

 the figure of one of these larvae (fig. 14) it will be seen that the 

 first pair of legs has already developed its full number of seg- 

 ments. In the second pair the femur is extremely short, while 

 the tibial and tarsal regions of the limb consist only of one joint 



