M A I I D E A. 



in its prominent proeorbital spine, and also in having the outer an- 

 tenna) properly exposed, although usually lying inward under the 

 beak. The species are still nearer Halimus in form and structure, 

 but the four posterior legs have the penult joint cylindrical. The 

 surface^ is smooth or nearly so ; there are traces of two distant tuber- 

 cles in the same transverse line on the median region, similar to those 

 of some Epialti. 



PUGETTIA GRACILIS. 



Oarapax lyratus, paulo convexus, latus, pone oculos utrinque large" trian- 

 gulato-expansus cum angulo acuto, margine postero-laterali spind 

 crassd armato, latitudine ante-mediand vix minore quam latitudo post" 

 mediana, regione mediand tumidd, minutd bituberculatd. Pedes antici 

 crassi, longi, brachio supra carinato, dentato, carpo bicarinato, digitis 

 fere omnino contiguis. Pedes octo postici nudiusculi, articulis Btio 

 5toque subcarinatis, 4 to dorsum depresso, 5 to versus apicem inferiorem 

 penecillum setarum brevissimum ferente. 



Carapax lyrate, somewhat convex, broad ; on either side behind the 

 eyes a large triangular expansion with angles acute ; outer margin 

 of postero-lateral region armed with a stout spine ; gastric diameter 

 but little less than the cardiac. Beak setigerous, horns somewhat 

 divaricate. Medial region tumid, minutely tuberculate, and ante- 

 rior to each tubercle a series of curled setae. Anterior feet stout 

 and long, arm carinate above and dentate, carpus bicarinate, 

 fingers mostly contiguous within. Eight posterior feet nearly 

 naked, third and fifth joints subcarinate, fourth depressed on 

 upper side, fifth with a short pencil of setae below, towards apex. 



Plate 4, fig. 3 a, male, natural size ; b, under view of head, enlarged 

 four diameters ; c, abdomen of male, natural size. 



Puget's Sound. 



Length of largest specimen seen, a female, one inch and four lines ; 

 breadth across from angle to angle of projection behind the eyes, ten 

 and one-fourth lines ; breadth across from tip to tip of lateral spine, 

 eleven and one-fourth lines ; length of beak, nearly four lines ; length 



30 



