PYCNOGONIDS 269 



AMMOTHEA GRACILIPES sp. nov. 

 Plate XII, fig. 5 ; plate xviii, figs. 1-6. 



Type.— ^ and ?, University of California, No. 19,506, Lands End, 

 San Francisco County, California. 



Trunk rather broad, tapering rather abruptly behind the third lateral 

 processes, smooth, broader anteriorly, where the lateral corners are pro- 

 duced into rounded, unarmed tubercles; sutures indistinct; lateral 

 processes close together, about as long as breadth of trunk, even with 

 second pair, abruptly narrowed in proximal half, and with a small dorsal 

 tubercle at the distal end. 



Caudal segment moderately long, reaching at least to the end of the 

 first coxal joint of the fourth legs, curved upward, and usually some- 

 what bifid as seen in lateral view ; smooth. 



Eye tubercle short, bluntly conical, and but slightly hipped. Eyes 

 rather large ; at base. 



Proboscis about as long as trunk to base of caudal segment ; rather 

 narrow as seen from above and broadest at about the middle ; from the 

 side, broadest beyond the middle and more nearly straight on ventral side. 



CheHfori somewhat less than half the length of the proboscis ; scape 

 short and thick, produced into a small dorsal tubercle at the distal end ; 

 second joint about half as long as scape, oval. 



Palpi 8-jointed, but little longer than the proboscis; jj.\ and 3 short; 

 jj.2 and 4 long, equal; yy.5, 6, 7, 8 short, rounded, bulging somewhat 

 ventrally, where each is armed rather densely with short bristles ; first 

 four joints nearly unarmed. 



Ovigera of female about as long as palpi;/: short, square; /a longer; 

 /3 equal to /.i ; j.\ as long as /.2, broader distally; /5 longest ;y.6 

 smaller than/ 7 ; jj.Z and 9 successively smaller; /lo very minute;/'. 7, 

 8, 9, 10 each provided with a pair of denticulate spines; aside from this 

 the appendage is practically unarmed. Ovigera of male about one and 

 three fourth times as long as that of female; /i short and thick; j.z 

 twice as long but of the same diameter; /s still longer, narrower; j.\ 

 slightly shorter than/.3 ;/'. 5 and 6 about equal, each about as long as/i ; 

 /7 projecting somewhat at its outer distal comer; /8 small; /g slightly 

 longer ; / 1 o minute. The only denticulate spines distinguished were two 

 on/ 10. The third joint and those comprising the terminal part of the 

 oviger have a few scattered bristles along the side o^ greater curvature, 

 while/ 7 has a clump of 4 or 5 at its distal end. 



Eggs relatively large (about 0.13 mm. in diameter), in small balls with 



