216 



ALLAN HANCOCK PACIFIC EXPEDITIONS 



VOL. 18 



Remarks. — The relationship of this species to P. daboius is discussed 

 under the remarks of that species.. ;.- ., &~ 



Paraphoxus lucubrans appears related to P."nasutus (Gurjanpva 

 1936: 249) but several important characters, were not described for P. 

 nasutus, such as the epistome and the first 2 pairs of uropods. A dorsal 

 drawing of the head of P. nasutus is needed ibr final comparison in order 

 to determine the extent of the rostral incision anterior to the eyes in that 

 species. • \ i '■'"-■ f"~' 



PLATE 13 

 Paraphoxus lucubrans n. sp., male, young, 4 mm, Sta. 2498-53. 



Figs. A, head; B, antenna 2; C, uropod 3. 

 Male, 3.25 mm, Sta. 2394-53. Figs, D, head; E, antenna 2; F, plecn segment 



• , 3 ; G, uropod 3. . , ■: 



Epistomes of several specimens, Figs. H,IJ,K,L. 



Juvenile animals have the inner ramus of uropod 3 much shorter 

 than in the adult female, although some small specimens have a rather 

 long inner ramus of uropod"3 (see Plate 14, fig. V). These specimens are 

 small, 2-3.5 mm, and have fewer teeth on peraeopod 5, poorly spinose 

 uropods 1-2 a/id article 5 of gnathopods- 1-2 is ''slightly shorter. 



This species is very closely related to P. epistdmus, differing mainly 

 in the shorter epistomal process. One of the most distinctive collections 

 of this species' occurred near J?t, Conceptiony-a theoretical fauna! bound- 

 ary line. Here the specimens were large and well developed, with a ros- 

 trum of the flaring kind' usually associated with P. epistomus: Study of 

 materials north of Pt. Conception may show that P. lucubrans is mainly 



