TERTIARY DECAPOD CRUSTACEANS. 169 



Of recent species of Lyreidus, one, L. bairdii Smith 1 has been found 

 in deep water off the Atlantic and Gulf coasts of the United States. 

 Its carpus is less elongate and lacks the longitudinal ridge present in 

 our fossil form; the principal spine of the inner margin is also further 

 forward. 



Family CALAPPID-E. 



Genus CALAPPA Weber, 1795. 



Calappa flammea (Herbst). 



Cancer flammeus Herbst, Natur. Krabben u. Krebse, vol. 2, plate 40, fig. 2, 1794; vol. 3, pt. 

 3, p. 19, 1803. 



Material. Three dactyls of right or major chelae; also a specimen 

 showing the proximal half of both fingers of the right chela and their 

 attachment to each other. From the Yaqui Valley at Cercado de Mao 

 (Bluff 3), Santo Domingo; lower Miocene; C. J. Maury, collector; 1916. 



Range. Recent specimens range from North Carolina, or occasion- 

 ally farther north, to Colombia and Venezuela; also at Bermudas and 

 Cape of Good Hope. Fossil fingers have been taken in the Pleistocene 

 of Panama. 



Genus CALAPPELLA Rathbun, 1918. 



Calappella (?), species. 



(Plate 9, Figure 12.) 



Material. A piece of the right manus and 4 loose spines, from the 

 Yaqui Valley at Cercado de Mao (Bluff 3), Santo Domingo; lower 

 Miocene; C. J. Maury, collector; 1916. 



The following is a description of this species : 



The specimen figured is a fragment showing a portion of the outer and of the 

 under surface broken from the middle of the right manus of a species allied to 

 Calappa. The specimen is rather closely granulated except above, and bears 

 two tubercles, the larger and more distad conical, the smaller one more obtuse 

 at end. Four single, elongate-conical, slightly curved spines, from 3 to 4.5 

 mm. long, are thought to belong to the same species; two of the spines belong 

 at an articulation, probably at the lower distal angle of the merus of the 

 chelipeds (right and left); another spine appears to have come from the 

 proximal end of the manus. 



Relationship. The genus Calappella was erected for a species from 

 the Oligocene of Panama. The type specimen shows only the carapace, 

 which is armed with elongate, curved spines. On account of the spines 

 the Santo Domingan fragments are referred tentatively to the same 

 genus. 



Genus CYCLOES de Haan, 1837. 

 Cycloes bairdii Stimpson. 



(Plate 9, Figure 8.) 

 Cyclois bairdii Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, p. 237, 1860. 



Material. The lower distal portion of the outer surface of the left 

 or secondary manus, with propodal finger. So far as can be judged 



1 Proc. U. S. Nat. Mus., vol. 3, p. 420, 1880. 



