CALIFORNIA STALK-EYED CRUSTACEA. 99 



Platymera Gaudichaudii Milne- Echvards. 



Platymera Gaudichaudii Milne-Edwards, Hist. Nat. Crust., T. II, 1837, 

 p. 108. Edwards and Lucas, D'Orbiguy's V03'. I'Amer. Merid. VI, 

 Part I, 1843, p. 28, PI. XIII, fig. 1. Faxon, Mem. Mus. Comp. Zool. 

 Harvard Coll., Vol. XVIII, 1895, p. 32. Eathbun M., Proc. U. S. 

 Nat. Mns., Vol. XXI, 1898, p. 610. 



Platymera californiensis Kathbun M., Proc. U. S. Nat. Mus., Vol. XVI, 

 1893, p. 253. 



Carapace strongly couvex, evenly granulated and furnished with several 

 small, depressed tubercles. The anterior margin of the front is truncated 

 and strongly concave when seen from in front. Postorbital tooth very small. 

 Antero-lateral margin regularly arcuated and armed with about fifteen 

 small teeth separated by concave interspaces. Lateral spine large, straight, 

 subcylindrical. Maxillipeds granulated; ischium dentated on the inner 

 margin; merus very deeply excavated at the antero-internal angle. Merus 

 of the chelipeds armed with a spine at the infero-distal angle, above which 

 is a small tooth; carpus with some small tubercles on the outer surface; 

 hands also furnished with several small tubercles on the outer surface; the 

 ridge on the lower portion of the outer surface is very large and bears a 

 small tooth near the proximal end; the superior crest is more or less hairy 

 and armed with six teeth; a granulated ridge on the lower side of the 

 hand; pollex short, subtriangular, flattened, depressed; the outer margin 

 of the finger is prominent, granulated, and when closed, is at right angles 

 to the palm. Upper margins of the ambulatory legs granulated, either the 

 first or the second pair may be the longer. 



Length of carapace, 41 mm.; breadth between tips of lateral spines, 79 

 mm.; length of lateral spine, 12 mm. 



Described from a specimen received from Miss 

 Rathbun. 



Chili; Panama to lat. 37^ 0' 30" N., Ion. 122° 33' 30" 

 W. Depth, 29 to 204 fathoms. 



^ Family LEUCOSIID^. 



Afferent branchial channels opening at the antero-lateral angles of the 

 palate. Palp of the external maxillipeds entirely concealed beneath the 

 merus. Verges of the male on the sternum. 



Genus Randallia Stimpson. 



Carapace subhemispherical, evenly rounded at the sides, with two lobes 

 or teeth on the posterior margin. Front narrow, very short, with a con- 

 cave anterior margin. Eyes small, and located in small, circular orbits 



