190 



University of California Publications in Zoology [Vol. 23 



Family Calappidae 



Carapace rounded, crab-like; afferent (ineurrent) openings to gill chambers lie 

 in front of the chelipeds. Third maxillipeds do not completely close the buccal 

 cavern; palp of maxillipeds always exposed. Antennae small. Legs normal in 

 size and position. Abdomen hidden under the thorax. Male genital openings 

 coxal, female sternal. 



Genus Mursia Leach, Desmarest 



Carapace strongly convex, transversely oval, with a strong lateral spine on 

 each side; front narrow. Chelipeds large; when folded fitting close to the body; 

 hands large, compressed distally, widened, surmounted by a laminate and dentate 

 crest, and furnished with a longitudinal, granulated ridge near the lower side of 

 the outer surface. 



Mursia gaudichaudii (Milne Edwards) 



Platymera gaudichaudii Milne Edwards, Hist. Nat. Crust., 2, 108, 1837; 



Milne Edwards and Lucas, in D'Orbigny's Voy. dans l'Amer. Mer., 6, 



pt. 1, p. 28, 1843, pi. 13, 1847; Holmes, Occas. Papers Calif. Acad. Sci., 



7, 99, 1900; Eathbun, H. A. E., 10, 170, 1904. 

 Mursia gaudichaudii Weymouth, Stanford Univ. Publ., Univ. Ser., no. 4, 19, 



1910. 



Fig. 118. Mursia gaudiclw-udii (after Milne Edwards and Lucas). 



Characters. — Carapace strongly convex; anterior margin of front truncated 

 and strongly concave when seen from in front; postorbital tooth very small; 

 anterolateral margin regularly arcuated, armed with about fifteen small teeth 

 separated by concave interspaces; lateral spine large, straight, subcylindrical. 

 Hands of chelipeds furnished with several small tubercles on outer surface; ridge 

 on lower portion of outer surface very large, bearing a small tooth near proximal 



