534 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Somewhat allied to Pilumnus but differs gj-eatly in the character 

 of orbits and eye-peduncles. (Stimpson.) 

 West Coast of Mexico; South Australia. 



ACIDOPS FIMBRIATUS Stimpson 



Plate 215 



Acidops fimbriatus Stimpson, Ann. Lye. Nat. Hist. New York, vol. 10, 1871, p. Ill 



[21] (type-locality, Cape St. Lucas; type not extant), 

 f Ceratoplax ciliata Cano, Bull. Soc. Nat. Napoli, ser. 1, vol. 3, 1889, p. 229 



(Ecuador). Not C. ciliata Stimpson. 



Diagnosis. — Eyestalks long (for a Xanthid) and flattened. An 

 anterior fringe of hair. Lateral teeth inconspicuous. Chelipeds 

 short. 



Description. — Anterior and antero-lateral margins of carapace 

 ciliated with a fringe of long fine hairs. Carapace covered with a 

 short pubescence and areolated, the areolets being sufficiently dis- 

 tinct, but not at all protuberant. Angle of orbit and next tooth of 

 antero-lateral margin about equal in size; the other two teeth very 

 small. Subhepatic region smooth. Front not prominent; median 

 sinus slight; lobes very slightly convex. A strong, prominent endos- 

 tomial ridge, continued to the epistome. External maxillipeds 

 hair}-; merus somewhat swollen. Chelipeds somewhat hairy; hand 

 granulated on outer side; fingers short, acuminate and with granu- 

 lated longitudinal ridges. Legs ciliated. Resembles Ceratoplax ciliatus 

 in appearance. (After Stimpson.) 



Measurements. — Male type, length of carapace 5.3 mm. (0.21 inch); 

 width of same 7.1 mm. (0.28 inch). Female (Baumoris), length of 

 carapace 10.3, width of same 14.3 mm. 



Range. — Cape St. Lucas, Lower California, Mexico (type-locality); 

 ? Ecuador; South Australia. 



Material examined. — Baumoris, Port Phillip, Victoria, Australia; 

 J. Gabriel; 1 female (Austrahan Mus.). This specimen sent for 

 examination some years ago fits Stimpson 's description except in 

 one minor point, that is, the first 3 lateral teeth are subequal and 

 larger than the fourth, instead of the last two very small. The 

 Australian specimen is twice as large as the type and of the opposite 

 sex. The areolation of the carapace is fairly distinct in spite of the 

 pubescence which is very short and dense and mixed on the elevations 

 with a few long, coarse hairs. Maxillipeds wide, merus transversely 

 oblong-oval, without a notch at the inner angle. First segment of 

 abdomen (female) much wider than an}^ of the others. 



Genus PILUMNOIDES Milne Edwards and Lucas 



Pilumnoides Milne Edwards and Lucas, d'Orbigny's Voy. I'Am^r. M6rid., 

 vol. 6, pt. 1, Crust., 1843, p. 21; type, P. perlatus (Poeppig).— A. Milne 

 Edwards, Crust. Reg. Mex., 1880, p. 303. 



