ILaguna S^arine ILa&oratorp 



and folding down to rows of fine hairs. Auxiliary claws very small. 

 Genital openings not apparent. Color straw. Measurements in mm. 

 Proboscis 1.424; body (from anterior edge to insertion of abdomen) 

 1.5; leg (approximately) 8; diameter of lateral (leg-bearing) pro- 

 cesses .428. 



This specimen was swept from fucus at low tide and was put in 

 a bottle with a small nudibrauch mollusk which we caught about the 

 same time. About half an hour later we discovered this pycnogonid 

 greedily feeding on the nudibrauch. This is of special interest as 

 very little is known of the feeding habits of these interesting crea- 

 tures. 



This species bears a superficial resemblance to Pallenopsis, how- 

 ever it differs from that genus in the following respects, i. e. : The 

 abdomen is neither long nor slender, there are no eyes apparent, 

 and the ovigerous legs, instead of being ten-jointed and present in 

 both sexes, are in my specimen reduced to the merest rudiments and 

 are within the body wall so that externally they do not show. On 

 the other hand it is not a typical Aiiuplodnctylus, the body being- 

 more compact than is usual in that genus, though not nearly so 

 compact as that of A. anarthrus (Loman). 



Ammothella bi-unguiculata var. californica n. var. 



(Figure 50) 



Body distinctly segmented, leg-bearing processes moderately 

 separated and moderately developed. Their length is about one-half 

 their diameter. Intersegmental lines all distinct. Proboscis slim, 

 spindle shaped; in length two and one-half times the diameter, and 

 four-thirds the length of the body; ending in front with a rounded 

 obtuse angle as seen from above. Pour eyes in pairs on a very low 

 eye tubercle ; well pigmented. Abdomen small, cylindrical, less than 

 one-fourth the length of the body, with bluntly rounded tip. Anus 

 in notch at the tip. Chelifores short, one-sixth the length of the 

 proboscis, three-jointed; chelae undeveloped; first joint very short, 

 shaft not quite as long as terminal joint which is nearly* spherical. 

 Diameter of chelifores slightly less than that of the palpi. Palpi 

 nine-jointed ; as long as the proboscis. First joint short and thicker 

 than the others. Second joint four times as long as the third ; fourth 

 joint almost as long as the second; fifth and sixth joints about the 

 same length as the third. Terminal joints decrease in order. Very 

 few hairs on the palpus except on the terminal joint. Ovigerous legs 

 slightly longer and with slightly greater diameter than the palpi. 

 The ten joints named in the order of their lengths (except the first 

 which is short and much thicker than the rest) are, 4, 2, 5, 6, 3, 7, 

 8, 9, 10. The terminal joints are spirally rolled and on the tip of the 



