I. '08. 



41 



The outer urojjod is much longer than the inner, and is 

 rather less than four times as long as broad. 



Of the four specimens examined, none possess the secondary 

 stylet at the base of the inner branch of the second pair of 

 pleopods which is characteristic of the mature male. 



Size. — The four specimens examined yield the following 

 measurements in mm. : — 



Total length. 



Carapace. ^ 



Abdomen. 



Antennal scale, "^ 



70 



19-5 



39-5 



11 



65 



18 



35 



9-5 



59-5 



16-5 



34 



8-5 



51 



14-5 



28 



8 



1 



100 mm. probably represents the maximum length of this 

 species. Larger specimens (up to 160 mm.) have been re- 

 corded, but there is evidence to show that these should more 

 properly be referred to Pasiphae princeps. 



Colour in life. — According to Wollebaek, in larger speci- 

 mens " the top part of the carapace presents a colourless trans- 

 parency, being elsewhere more or less translucent and milky 

 in hue. The smaller individuals are quite transparent, with 

 parts of the legs and lamellae red." 



General distribution. — Pasiphae tarda is known along the 

 Scandinavian coasts from S. Norway to W. Finmark (Sars, 

 Norman, etc.), from Denmark (a single specimen, Meinert), 

 from Iceland and Jan Mayen (Hansen), from Davis Straits 

 and the coasts of Greenland (Hansen and Kroyer), and from 

 the East Coast of the United States north of Cape Cod 

 (Smith). Three of the specimens examined by the author 

 were caught by the Danish Fishery Steamer Thor at the fol- 

 lowing localities : — 



29/8/'05.— 61° 20' N., 11° 0' W. Soundings 710 fathoms. Mid- 

 water trawl, 0-164 fathoms — One, 51 mm. 



31/8/'05.— 57° 46' N., 9° 55' W. Midwater trawl, 0-274 

 fathoms — One, 70 mm. 



29/8/05.— 60° 0' N., 10° 35' W. Soundings 574 fathoms. Mid- 

 water trawl, 0-548 fathoms — One, 59-5 mm. 



Lo Bianco (1903) records several small Pasiphae (8-35 

 mm.), caught in the Mediterranean near Capri, as P. tarda. 

 In our present state of ignorance regarding the differential 

 characters of post-larval "fork-tail" Pasiphae, this record 

 must be looked on with suspicion. 



1 Measured in mid-dorsal line. 



2 Including apical spine. 



