1897.] 



NATURAL SCIENCES OF PHILADELPHIA. 



401 



Fig. 11. Synidotea picta 

 Benedict, x #. 



Synidotea picta, new species. Figs. 11 and 12. 



The head is deeply excavated in 

 front ; the notch is deep ; the tuber- 

 cles in front of the eyes are near to 

 and overhang the margin. 



The median line of the cross areo- 

 lation is elevated into a wedge-shaped 

 ridge which overhangs the notch in a 

 vertical view ; the transverse extrem- 

 ities of the cross are elevated forming 

 tubercles ; the lateral areolations are 

 protuberant and are separated by a 

 deep depression which unites with the 

 depression in front of the postce- 

 phalic lobe and the one behind the 

 cross, altogether forming a B shaped 

 depression. The elevated portions of 



the head are pitted. The flagellum of the antennae is composed of 

 eight or nine segments. From the anterior angles the body widens 

 to the fourth segment ; from this point it diminishes evenly in size 

 to the end of the abdomen. All of the segments have low swellings 

 on the median line and numerous rugosities on the sides. The ex- 

 tremity of the abdomen is pointed ; the surface is punctate. 



This species is beautifully colored ; the 

 antennal peduncles are patched with dark, 

 the anterior margins of the head are in some 

 specimens blotched with rose ; the rugosities 

 of the thorax are tinged with red, the abdo- 

 men is blotched Avith red and dark. In 

 the more highly colored specimens the lower 

 portion of the segments are light and red, 

 except on the fourth which is always dark. 

 The legs have a patch of dark on each joint. 

 The length of a large specimen is 14 mm. 

 The seven type specimens were dredged 

 at Station 3,600, lat. N. 55° 06' 00", Ion. W. 

 163° 28' 00", 9 fathoms, in company with S. 

 nebulosa (No. 20,502, U. S. N. M.). 



Variety. — Specimens obtained by Mr. Dall 

 in Bering Strait (No. 13,311, U. S. N. M.), 



Fig. 12. Synidotea picta, 

 var. x 



3. 

 1* 



