BRACHYURA AND MACRURA 201 



Actaea dovii Stimpson. 



Actaa ^<77/K Stimpson, Ann. Lye. Nat. Hist. N. Y., x, 104, 1871. — A. Milne 

 Edwards, Crust. Reg. Mex., 244, pi. xlv, f. i, 1879. — Faxon, Mem. 

 Mus. Comp. Zool., xviii, 16, 1895. 



Tagus Cove, Albemarle Island, on reef north of Tagus Hill, March 

 16, one small male. The male of this species is considerably narrower 

 than the female ; the width of the male is from i .4 to i .42 times its 

 length ; of the female from 1.53 to 1.55 times its length. The Gala- 

 pagos specimen has eleven orange-red stripes extending backward from 

 the frontal and antero-lateral margins and converging posteriorly. 



Distribution. — San Salvador; Panama. 



Xanthias politus Rathbun. 



Micropanope polita Rathbun, Proc. U. S. Nat. Mus., xvi, 238, 1893. 

 Panopeiis tanneri Faxon, Bull. Mus. Comp. Zool., xxiv, 154, 1893; Mem. 



Mus. Comp. Zool., xviii, 19, pi. iii, f. 4, 4a, 1895. 

 Xattthias politus Rathbun, Bull. Labor. Nat. Hist. State Univ. Iowa, iv, 271, 



1898 ; Proc. U. S. Nat. Mus., xxi, 587, 1898. 



Tagus Cove, Albemarle Island, 12 fathoms, one male. 



Previously taken off Hood Island, Galapagos, in 20 fathoms ; near 

 the Galapagos in 53 fathoms ; near Cocos Island, 66 fathoms ; and off 

 Lower California in 31 to 36 fathoms. 



Pilumnus spinulifer Rathbun. 



Pilumnus spifiulifer Rathbun, Proc. U. S. Nat. Mus., xxi, 585, pi. xlii, figs. 

 6-8, 1898. 



Tagus Cove, Albemarle Island, 12 fathoms, 2 males, i young female. 



Tagus Cove, on reef north of Tagus Hill, March 16, i male. 



These specimens are smaller than the types. The series indicates 

 that the relative width increases with size. The types had a nearly 

 naked carapace and chelipeds, remarkably so for a Pilumnus. The 

 Galapagos specimens have however a downy coating of hair, thicker 

 on the anterior portion of the carapace, where there are also a few 

 tufts of longer and stouter setae. The relative bareness of the large 

 specimens may be due to age, environment or accident. 



Distribution. — Off Cape St. Lucas, 31 fathoms. 



PILUMNOIDES PUSILLUS sp. nov. 

 (PI. XII, figs. 9 and 10.) 

 Carapace one fourth broader than long, slightly convex, somewhat 

 lobulate, the protogastric region divided in two by a longitudinal fur- 

 row, the area adjacent to the antero-lateral margin broken up into four 

 or five lobules ; entire surface very finely granulate. Margin of frontal 



