244 BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



HEPATUSCHILIENSIS Milne Edwards 



Plate 72, Figures 1, 2; Plate 73, Figures 1-5 



Hepatus chiliensis Milne Edwards, Histoire naturelle des Crustaces, vol. 2, 

 p. 117, 1837 (type locality, Valparaiso; type in Paris Mus.)- — Rathbun, Proc. 

 U. S. Nat. Mus., vol. 38, p. 551, pi. 37, fig. 1, 1910.— Porter, Rev. Chil. 

 Hist. Nat., vol. 25, p. 424, fig. 36, 1921. 



Hepatus chilensis Milne Edwards and Lucas, in d'Orbigny's Voyage dans 

 I'Am^riquc m^ridionale, vol. 6, pt. 1, p. 28, 1843; vol. 9, atlas, pi. 14, 1847. — 

 Dana, U. S. Exploring Expedition, Crustacea, p. 395, pi. 25, fig. 3, 1852. — 

 Heller, Reise der osterreichischen Fregatte Novara, p. 70, 1865. — Miers, 

 Proc. Zool. Soc. London, 1877, p. 656. 



Hepatus angustata Kinahan, Journ. Roy. Soc. Dublin, vol. 1, p. 345, 1857 (1858); 

 not Calappa angustata Fabricius, 1798. 



Hepatus angustatus Ortmann, Zool. Jahrb., vol. 6, p. 569, 1892 (part; not H. 

 decorus). — Lenz, Zool. Jahrb., vol. 2, suppl. 5, p. 751, 1902. 



Diagnosis. — Front truncate, scarcely or not at all advanced beyond 

 line of suborbital cavities. Posterior and postlateral margins marked 

 by elongate tubercles and devoid of teeth. Sixth segment of male 

 abdomen with a median terminal tubercle. 



Description. — Anterior margin of front truncate, subacute. The 

 hue descending from the external orbital angle to the anterior border 

 of the carapace is finely granulous and continuous with the antero- 

 lateral arch. The anteror two-thirds of this arch is regularly denticu- 

 late, the denticles not tooth forming in the old but separated by faint 

 suture lines into groups of three or foiu*; in younger specimens these 

 groups or lobes are defined by V notches, especially at the widest 

 part of the arch. One adult male from Icjuique is an exception, 

 preserving the well-marked lobes of the immature. Suborbital cavi- 

 ties broad and low. Of the eight dorsal lines of tubercles, those on 

 branchial and cardiac regions are arcuate. Upper margin of palm 

 with four low dentiform projections, tips blunt. Dactyli of ambula- 

 tories with a strip of fur above and below, not extending to proximal 

 end, sides mostly bare. 



Color. — Carapace a yellowish or ochreous base closely covered with 

 a brownish purple reticulation. (Dana.) Nearly uniform pink, with 

 narrow sinuated light yellow spots and hues. (Aliers.) 



Measurements. — Male (40453), length of carapace 56.5, with 84 mm. 



Range. — 'Ecuador to Chile; 2}^ to 23 fathoms. 



Material examined. — See table 78, page 245. 



