170 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



Pitho quinquedentata Bell 

 Plate J, Fig. 2 ; Plate 18, Fig. 1 



Pitho quinquedentata Bell, 1835b, p. 172. Rathbun, 1910, p. 573 (part: 



not the Gulf of California locality) ; 1925, p. 361, pi. 250, figs. 1-4, 



text-fig. 117a. Boone, 1927, p. 151, fig. 46. Garth, 1946, p. 386 



(part: not the Isabel Island locality). 

 Othonia quinque-dentata, Bell, 1836, p. 57, pi. 12, figs. 2-2e. Not White, 



1847, p. 9. 

 Othonia mirabilis, Gerstaecker, 1857, p. 113 (part). Not Cancer mira- 



bilis Herbst. 

 Othonia quinquedentata, A. Milne Edwards, 1875, p. 118; 1878, pi. 24, 



figs. 3a-c. 

 tOthonia aculeata?, Cano, 1889, pp. 101, 181, pi. 7, fig. 6. Not Hyas 



aculeata Gibbes. 



Type: Female holotype, length 12.7 mm, width 10.6 mm; originally 

 in the Museum of the Zoological Society [London], no longer extant. 

 Type locality: Galapagos Islands, 6 fathoms, sandy mud; Hugh 

 Cuming, collector. 



Localities subsequently reported, with collectors: Panama: Bay of 

 Panama (A. Milne Edwards). Ecuador: Galapagos Islands (A. Milne 

 Edwards ; Rathbun, 1925). ?Peru: Payta [Paita], Vettor Pisani (Cano, 

 1889, as Othonia aculeata Gibbes?). 



Atlantic analogue: Pitho Iherminieri (Schramm). 

 Diagnosis: Carapace nearly smooth and weakly tuberculate. Five 

 lateral teeth, the second and third united at base, the second and fifth 

 reduced in size. Cheliped of adult male greatly exceeding first walking 

 leg. First free antennal segment of moderate width. Male first pleopods 

 nearly linear. 



Description: Carapace of male narrow behind. Front rather wide, 

 inner orbital tooth decidedly more advanced than outer tooth, rostral 

 teeth still more advanced and separated by a V interspace. Lateral teeth 

 five, blunt, the last two very small, the last one hardly more than a 

 tubercle ; second tooth nearly as large as third, and not entirely separated 

 from it. First movable segment of antenna rather narrow. Chelipeds with 

 manus compressed, upper edge sharp. (Rathbun, 1925, of a male from 

 the Galapagos Islands in the Paris Museum, in all probability the speci- 

 men figured by A. Milne Edwards) 



Material examined: 11 specimens from 3 stations, all Panamanian. 

 (See Table 29) 



