550 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.38. 



They arc taken at low tide by thrusting one's arm into the deep holes in the mud. 

 The fisherman first enlarges the hole with his foot. The meal is of excellenl flavor. 

 Color: Carapace olive-green, margined with orange; claws, legs, and eye stalks deep 

 red. A handsome and valuable form. 



Not previously known from Peru. 



Distribution. — From Lower California to Peru; Valparaiso ( '.). 



OCYPODE GAUDICHAUDII Milne Edwards and Lucas. 



Plate 43, fig. 2. 



Ocypoda gaudichaudii Milne Howards and Lucas, d'Orbigny's Vby. Aim'r. 

 Mer., vol.6, pt. 1, L843,p.26; vol. 9, atlas, L847.-pl.il, figs. 4-46. 



Carapace squarish, broader than long, anterior corners flattened. 

 Front between the eyes narrow, bent down. Eyes large, elongated, 

 prolonged beyond the cornea in a slender style. Chelipeds stout. 

 unequal, rough, fingers with truncate ends. Legs long, finely rough- 

 ened. 



Width about 40 mm. 



Taken on the beach at Las Vacas, near Capon, January 23, 1908. "Carretero" 

 (= cart-driver). 



Beach, Lobos de Tierra, March :'>(). 



Sand beach, Chimbote, February 27. Very abundant. 



Sand beach, Ancon, February L3. Their burrows were common on the beach, 

 hut only two crabs were seen out on the beach (early afternoon). 



Dishihiifion.— From Lower California to Chile; Galapagos Islands. 



UCA PRINCEPS (Smith). 

 Plate is. fig. 3. 



Gelasimus princeps Smith, Trans. Conn. A.cad. Sci., vol. 2, L870, p. 120, pi 2, 

 iii, r . 10; pi. 3, figs. :'. 'Ac 



Carapace trapezoidal, very broad, especially anteriorly, angles 

 acute; surf ace nearly smooth. Front between the eyes very narrow, 

 spatulate, bent down. Lyes with very long, slender stalks, sel in 

 deep orbits. One cheliped of male enormously developed, the hand 

 joint longer than width of body; palm coarsely toughened: lingers 

 long and broad, smooth except on margins; other cheliped of male 

 and both chelipeds of female very small. Legs smooth, merits joints 

 expanded. 



Width of bark :::> to 40 mm. 



Salt flats at Puerto Grande on the Rio Za rum ilia (2 leagues from Capon), February 2, 

 I'm- "Maestro-Sastre" (meaning master- tailor). 

 Salt marshes hack of Chulliyache ion Bay of Sechura 



Not previously known from Peru. 



Distribution. — From San Bartolome Bay, Lower California, to 

 Peru. 



