270 



COLE 



6 or 8 eggs in a ball; the male may have from 10 to 15 of these masses 

 on each oviger. 



Legs about twice as long as body, rather slender, especially in the 

 male; c.i with an especially long finger-like projection on its dorsal side, 

 nearly as long as the joint itself; c.2 about half again as long as c.i ; ^.3 

 equals c.\\ f. broader in the female, with the conical projection and spine 

 characteristic of the genus at its distal end; /.i and 2 each about equal 

 to f., outer border uneven and armed with scattering short spines; ts.i 

 nearly unarmed; ts.2 large and stout, nearly as long as 2, well arched, 

 with a few small spines on the dorsal side ; heel with 3 rather strong, dis- 

 tally curved spines ; a row of short, slender spines along the sole beyond 

 it ; cl. stout and but little curved, half as long as ts.2. ; aux. cL well devel- 

 oped, half as long as cl. Except as mentioned, the leg is almost free of 

 armature ; there are a few short spines on c.2 and ^.3. 



Length 1.5 mm. to 2 mm. ; extent about 8 mm. 



SPECIMENS EXAMINED. 



Remarks. The present species of Ammothea was much the smallest 

 representative of the genus in the collections. In size it compares with 

 A. echinata of Europe. This species is described from the 3 speci- 

 mens from Lands End (Lot 9) ; the specimens from Oakland Creek 

 (Lot 12) differ slightly from these, but with the material at hand it did 

 not seem advisable to separate them as a subspecies. The process on 

 the first coxal joint is not so long, while the chelifori and caudal seg- 

 ments are apparently a little longer in proportion. With Lot 1 2 there 

 are 20 immature specimens in various stages of development, and all 

 with chelate chelifori. 



There were two species of Hydroids in the bottle with Lot 12, among 

 which the Pycnogonids were probably collected. These were identified 

 by Professor Nutting, one as Obelia dichotoma, the other as Obelia gela- 

 tinosa or a closely related species. 



AMMOTHEA PRIBILOFENSIS sp. nov. 

 Plate xn, fig. 6 ; plate xvm, figs. 7 and 8 ; plate xix, figs. 1-8. 

 Type. $ and ? , University of California, No. 19,507, St. Paul Island, 

 Bering Sea. 



Trunk broad, not markedly tapering posteriorly, unarmed; antero- 



