200 TRAK8ACTI0NS, NATURAL HISTORY SOCIETY OF GLASGOW. 



Socarnes Vahli, Boeck, Crust, amph. bor. et arct. 

 (1870), p. 20.— Boeck, De Skaiid. og Arkt. Amph. 

 (1872), p. 129; pi. vi. fig. 8. 



Habitat. — T)redgedi in 6-7 fathoms, off the north 

 side of the Clach Rock, C umbrae. 



SOCARNES ERYTHROPHTHALMUS, II. Sp. 



Eyes red, losing their colour in spirit. 



Upper Antennae. Principal flagellum consisting of 

 thirteen joints, the first sometimes not noticeably 

 longer than the second ; the secondary flagellum 

 consisting of four slender joints, the first occasionally 

 rather longer than that of the principal flagellum. 



Lower Antenna:. The gland-cone prominent, blunt; 

 the fourth joint of the peduncle much longer than 

 the fifth ; the flagellum of a number of joints varying 

 from six to nine, the third generally shorter than 

 the second or fourth. 



Maxillipeds. The apical margin in the inner plates 

 is cut into three teeth, and slopes strongly down- 

 wards to the outer margin. 



First Gnathopods, as in Socarnes Vahlii (Kroyer). 



Second Chxathopods. At the lower hinder angle of 

 the third joint there is a single long spiniform seta, 

 instead of a group as in Socarnes Vahlii, and the 

 hind margin of the hand is less produced, so that 

 distally it has a squared appearance. 



Telson apically narrowed, longer than the peduncle 

 of the third uropods, the cleft not reaching beyond 

 the middle, not dehiscent ; the surface carrying some 

 setules, and each apex having a couple. 



Length of female specimens bearing eggs in an 

 advanced condition, three-twentieths of an inch. 



Habitat. — Castle Baj', Little Cumbrae, dredged in 

 4 fathoms, muddy sand ; The Tan, Cumbrae, 8-10 

 fathoms ; Rothesay Bay, 12-14 fathoms, bottom mud 

 and small stones ; Millport Bay, surface-net. 



The colour of the eyes, the shape of the hand of 

 the second gnathopods, and the diminutive stature. 



