CALIFORNIA STALK-EYED CRUSTACEA. 83 



Carapace more strongly undulated in front than in nudus but not so 

 much flattened behind; the posterior portion is not punctate and the 

 .anterior portion may be sparsely granulated. Front four-lobed, the 

 median lobes the most prominent. The median portion of the epistome 

 is not granulated nor separated from the lateral portions by a deep smooth 

 interval. The ridge on the pterygostomian region furnished with several 

 .smooth, blunt teeth. The prominences behind the front are more conspic- 

 uous than in nudus and sometimes end abruptly anteriorly. External max- 

 illipeds smooth and punctated; surface of the merus next to the inner 

 margin flat. Chelipeds smooth; carpus with a prominent inner angle; hands 

 with a fine longitudinal ridge on the lower part of the lower surface which 

 becomes very faint with age. In the adult male there is a rounded lobe 

 on the antero-internal of the merus and a patch of long hair on the inner 

 side of the hand. Legs hairy, the dactyls narrower than in nudus, those 

 of the last pair upturned. 



The color is a dull gray mottled with ferruginous spots. The spots on 

 the legs are small, but there may be blotches of considerable size on the 

 carapace. The color is not so variable as in the preceding species although 

 very young specimens are occasionally marked with large blotches of 

 white. 



Length, 23 mm.; breadth, 28 mm. 



This species may readily be distinguished from the 

 preceding by its dull color, the hairiness of the legs, the 

 four-lobed front, and the absence of round red spots on 

 the chelipeds so characteristic of that closely related 

 species. Nudus is found chiefly among the rocks, while 

 oregonensis prefers the mud flats, where it is usually found 

 in abundance. 



Vancouver's Island. Common on mud flats from 

 Puget Sound to Lower California. It is also found 

 among rocks near the shore. 



Grapsodius, gen. nov. 



Carapace striated above, with the sides converging behind, and armed 

 with a single tooth behind the postorbital. Front broad, not deflexed, but 

 with the median portion depressed. Eye-peduncles short. Orbits with 

 the posterior surface bulging outwards instead of concave. Maxillipeds 

 narrow, widely gaping, and devoid of an oblique piliferous ridge; merus 



