60 



BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



INACHOroES MICRORHYNCHUS Milne Edwards and Lucas 



Plate 22, figs. 1 and 2 



Xiphus margaritifere Eydoux and Souleyet, Voy. Bonite, atlas, 1842 (?) 

 pi. 1, figs. 1-6 (type-locality, Cobija, Chile; type in Paris Mus.). 



Inachoides microrhynchus Milne Edwards and Lucas, d'Orbigny's Voy. 

 l'Am6r. M^rid., vol. 6, pt. 1, Crust., 1843, p. 5; atlas, vol. 9, 1847, pi. 4, 

 figs. 2-2jn (type-locality, Chile; type in Paris Mus.). — Nicolet, in Gay, 

 Hist. Chile, Zool., vol. 3, Crust., 1849, p. 126 {micrornynchus). — Miers, 

 Proc. Zool. Soc. London, 1881, p. 65. — Rathbun, Proc. U. S. Nat. Mus., 

 vol. 38, 1910, p. 533, pi. 36, fig. 1. 



Inachoides inornatus A. Milne Edwards, Journ. Mus. Godeflfroy, vol. 4, 

 1873, p. 77 (type-locality, "les ties Viti;" " type in Mus. Godeflfroy, 

 Hamburg). — Ortmann, Zool. Jahrb., Syst., vol. 7, 1893, p. 38. 



Diagnosis. — Carapace tuberculate and granulate. Postorbital 

 tooth with anterior margin transverse. Antennal spines incurved at 

 tip. Chelipeds longer than ambulatory legs. 



Description. — Cardiac region surmounted 

 by a tubercle and perhaps a few granules, 

 otherwise smooth. Gastric region with two 

 median tubercles, the anterior of which is the 

 largest of a transverse row of five ; each of the 

 terminal tubercles of this row has usually a tu- 

 bercle in front of it. Branchial region with two 

 irregular, longitudinal series of tubercles, one 

 marginal, the other considerably higher and sep- 

 arated from the first and from the inner border 

 by a smooth space. Hepatic region with mar- 

 ginal tubercles, a larger one at anterior angle. 

 Rostrum triangular, longer than its width at 

 base, acute, and Math a shallow median sulcus 

 in its posterior half. Orbital border elevated, 

 granulate, surmounted by a tubercle or blunt 

 tooth, Postorbital tooth triangular, its ante- 

 rior border transverse or nearly so. 

 Abdomen of both sexes medially carinate, a tubercle on the first 

 segment in the old. Sternum of male sparsely granulate. Basal 

 segment of antenna with two finely granulate crests meeting in an 

 acute antero-external tooth visible at the sides of the rostrum. 

 Maxillipeds granulate. 



Chelipeds of male strong, about one and a half times length of 

 carapace; palms swollen; fingers narrowly gaping except near the 

 extremities; an enlarged tubercle near middle of fixed finger. Am- 

 bulatory legs shorter than the chelipeds in adult males; upper sur- 



FiG. 16.— Inachoides micro. 



RHYNCHUS (18056), MAXILLI- 

 FED, X 17 



" This locality is an error; it should be Valparaiso; see Ortmann, Zool. Jahrb., Syst., vol, 7, 1893, p. 38. 



