no. 1766. STALK-EYED CRUSTACEA OF PERV—RATHBVN. 565 



Taken in trawl, Bay of Sechura, west of Matacaballa, depth about 5 fathoms, April 

 8, 1907. "Camerones del Mar." 



Not previously known from Peru. 



Distribution. — From San Francisco Bay, California, to Peru; 

 Galapagos Islands. 



CHLORIDELLA DUBIA (Milne Edwards). 



Plate 54, fig. 3. 

 Squilla dubia Milne Edwards, Hist. Nat. Crust., vol. 2, 1837, p. 522. 



A stomatopod or mantis shrimp. Carapace small, not covering 

 the last four segments of the thorax; rostrum oblong-triangular; 

 eye stalks dilated, cornea? oblique, conical shorter than peduncular 

 axis; first five pairs of thoracic limbs serving as accessory mouth 

 parts, the second pair strongly developed into large raptorial limbs 

 in which the dactylus bears six spines and closes on the manus like 

 the blade of a penknife; last three pairs of thoracic limbs ambulatory, 

 bearing a lateral appendage on the penult segment; lateral spine 

 of fifth thoracic segment curved. Abdomen large, its first live 

 segments carry tufted gills on the exopods, and have eight longi- 

 tudinal dorsal carina?; swimming fan large; telson wider than long, 

 with a median crest and a row of pits on each side; six marginal 

 spines, intervening denticles 1-3, 3-4, 1 ; basal process of uropods two- 

 spined, inner spine longer. 



Length 12 to 13 cm. 



Mouth of River Tumbes, January 15, 1908. "Cameron brujo " (=the wizard shrimp). 

 The "cameron brujo" is much feared by the fishermen and is said to inflict a very 

 severe wound. My guide received a bad wound in the foot while wading, and attri- 

 buted it to a "cameron brujo." Exopodite and endopodite of last pair of abdominal 

 limbs (uropods) red. 



Taken in casting net at mouth of river Tumbes (Isla Santa Lucia), January 15, 1908. 

 Color olivaceous, barred with red. A broad red bar on each segment of thoracic and 

 abdominal regions, this color being especially deep on the six longitudinal ridges. 

 Telson mainly red, bluish in median region, the margin white, with a band of blue 

 just interior to the white. Cephalic shield olivaceous, with narrow red streaks on the 

 longitudinal ridges. "Arms" bluish. 



Distribution. — Ecuador; Peru; also South Carolina and Georgia. 



PSEUDOSQUILLA LESSONII (Guerin). 

 Plate 52, fig. 3. 



Squilla Irssonii GuitmN , Voy. Coquille, Atlas, Crust., 1830, pi. 4, fig. 1. 

 Squilla cerisii Guerin, Voy. Coquille, vol. 2, pt. 2, 1831, p. 40. 



A mantis shrimp, with body more cylindrical than the preceding; 

 rostrum pentagonal, three-spined; corneal greater than peduncular 

 axis; dactylus of raptorial limb three-spined; no spine, on fifth 

 thoracic segment. First five abdominal segments smooth; telson 



