AMl'HII'onA <>K SOl'lflKKN NEW KNliLAND. 



523 



propodus fringed with tufts of setse; first and second peroeopods equal; merus much longer and wider 

 than carpus, which is wider than tin- slender, tapering propodus; dactyl slender, nearly straight, about 

 three-fourths the length of propodus; last three pairs with basal joints broad; third pair short, about 

 half the length of fifth; third abdominal segment about as long as two preceding ones combined; 

 posterior margins of fourth and fifth abdominal segments witli a row of spines on either side of mid- 

 dorsal line; uropods projecting backward about equally far; peduncles nearly as long as rami, those 

 of first and second pairs with a long spine at distal end beneath the rami; rami very spiny; telson 

 broader than long, posterior margin produced backward and rounded in the middle, a spine-like 

 eminence above each postero-lateral angle, and in front of each eminence an oblique row of four or 

 live closely set spines. 



Ur, 



un 



Ptilocheirus pingute. v», fa shows the propodus of the male oblique to the carpus as it naturally stands: </»i -fft shows the 

 propodus drawn after being flattened down. In the second gnathopod of the female the setse are net drawn, only one 

 being inserted to show the length attained by the seta- on the anterior margin of the basal joint. 



The dark pigment of this Bpecies is very well preserved in alcoholic specimens. The antenna' and 

 legs are devoid of pigment except on the basal joints of the last three pairs of peneopods. The head 

 is pigmented above. The thoracic segments are crossed by pigmented bars, the large first segment of 

 the male having a round, comparatively clear spot on either side. In each pigmented bar on the 

 thorax is often a narrow transverse light-colored band connecting light spots on either side. Pigment 

 occurs also upon the coxal plates. The eyes in alcoholic specimens are black. There is considerable 

 variation in the amount of pigment as well as in the color pattern. 



Length, 13 mm. 



Grand Manan (Stimpson); "Common on the whole coast of New England upon muddy bottoms, 

 and north to Labrador. In depth it extends down to 150 fathoms, and probably much farther." 

 (Smith.) This species is one of the most abundant of the New England Amphipoda. I have 



