154 BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM 



sides with some reddish pigment. Along the dorsal midline is a 

 series of black blotches, one on each segment, the one on the head 

 sometimes separated into two. There is also some black pigment 

 along the sides of the posterior metasome ; the chitin of the ventral 

 surfaces and appendages is pale green; the eye is deep claret. 

 (^Vlieeler.) 



Female. — Body short and stout; left posterior lobe of fifth seg- 

 ment larger than the right, its tip pointed outward and not reach- 

 ing behind the genital segment; urosome 3-segmented, asymmetrical, 

 the genital segment with a process at its right posterior corner, the 

 first abdominal segment with one at its left posterior corner; caudal 

 rami nearly symmetrical; endopod of fifth legs half as long as 

 exopod, with two unequal apical spines, exopod with two equal 

 apical spines and three smaller ones on the outer margin. Total 

 length, 2.35-2.65 mm. 



Male. — Rostral lens thickened; fifth segment usually and urosome 

 always symmetrical, except that the genital opening is on the left 

 side ; caudal rami long and narrow ; left fifth leg longer than right, 

 its end segment tipped with one large spine and two smaller ones 

 at its base ; hand of chela on right leg with a sharply pointed thumb 

 at the proximal corner and two processes on the inner margin, well 

 separated from each other; finger just reaching the tip of the 

 thumb. Total length, 2.75-3 mm. 



Remnrhs. — This seems to be a southern form that appears within 

 the present area during summer. It may be identified by the row 

 of black spots along the dorsal midline and by the details of the 

 fifth legs. 



PONTELLA LOBIANCOI (Canu) 



Figure 105 



Pontellina lobimwoi Canu, Bull. Sci. France et Belgique, vol. 19, p. 101, pis. 



8, 9, 1888. 

 Pontella loMancoi Giesbrecht, Fauna und Flora des Golfes von Neapel, vol. 



19, p. 461, pis. 24, 40, 1892. 



Occwrrence. — One female from surface tow. Station 10236, 

 Grampus., northeast of Cape Cod. 



Distribution. — Wimereaux (Canu) ; Gibraltar, Naples (Gies- 

 brecht) ; Adriatic (Steuer, Pesta) ; Irish Seas (A. Scott). 



Color. — Body varying shades of blue, in places having a greenish 

 tint, with a row of oval or rounded spots much darker in color along 

 the dorsal midline in the head and first three thoracic segments. 



Female. — Body relatively narrower than in the other species; 

 posterior corners of fifth segment with symmetrical lobes reaching 

 the center of the genital segment ; urosome 3-segmented, the genital 

 segment and caudal rami slightly asymmetrical; endopod of fifth 



