No. 10 GARTH : BRACHYURAN FAUNA OF THE GALAPAGOS 349 



Range. — From Angeles Bay, Gulf of California (Glassell), to Mata- 

 palo, Peru (Coker) ; Galapagos Islands (Albatross). 

 Atlantic analogue. — H. arcuata Stimpson. 



Diagnosis. — Frontal and lateral margins expanded in a broad arc con- 

 cealing eyes and antennules. Cardiac area paper thin. A distinct lobe at 

 widest part of dorsum. Manus with 3 granulate tubercles near fingers. 

 Last two pairs of legs prehensile. 



Material examined (11 specimens from 7 stations). — • 

 55-33. Lat. 1° 03' 30'' S, Long. 90° 17' 30" W, 60 fms, Feb. 5, 1933, 



1 female (USNM No. 68260). 

 147-34. Tagus Cove, Albemarle Island, 30 fms, Jan. 13, 1934, 1 female 



(USNM No. 69340), 2 males, 1 young (AHF no. 34013). 

 182-34. James Bay, James Island, 30 fms, Jan. 24, 1934, 1 female 



(USNM No. 69338). 

 190-34. Lat. 0° 55' S, Long. 90° 30' W, 58-60 fms, Jan. 26, 1934, 1 



young (USNM No. 69251), 1 young (AHF no. 34014). 

 200-34. Off Black Beach, Charles Island, 25-40 fms, Jan. 30, 1934, 



Imale (USNM No. 69245). 

 810-38. (D-2) Barrington Island, 73 fms, Jan. 26, 1938, 1 male 



(photographed) (AHF no. 38008). 

 816-38. North of Hood Island, 50-100 fms, Jan. 29, 1938, 1 male 

 (AHF no. 38009). 

 Measurements. — Largest specimen, female: length 33.5 mm, width 

 36.0 mm. 



Habitat. — Sand, sand and nullipore; coral, nullipore, and rock. 

 Depth.— ?,-\0() fms. 



Remarks. — Unlike the preceding species, Dromidia larraburei Rath- 

 bun, H. panamensis carries a shell "house" instead of a sponge. The shells 

 selected are not always of the same species, but are always the single valve 

 of a bivalve shell, pectens and clams being favorites. In this way they differ 

 from the hermit crabs of the tribe Anomura, which invariably select a 

 univalve, or gastropod, shell for their temporary abode. 



Family D YNOMENIDAE 



Genus DYNOMENE Latreille, 1825 



Dynomene Ursula Stimpson 



Plate61, Figs. 5, 6 



Dynomene Ursula Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, p. 

 239 (111), 1860. Rathbun, Bull. 166, U.S. Nat. Mus., p. 54, pi. 12, 

 figs. 1-4, 1937. Schmitt, Smithsonian Misc. Col., vol. 98, no. 6, p. 

 25, 1939. 



