168 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



long. In its ornamentation it is nearest P. californiensis Bouvier 1 

 (Lower California to Ecuador), but in that species the tubercles have 

 broadly rounded knobs at the summit, instead of pointed tips as in 

 P. inequalis. 



Tribe BRACHYURA. 



Subtribe OXYSTOMATA. 



Family RANINIDiE. 



Genus RANINA Lamarck, 1801. 



Ranina porif era Woodward. 



Ranina porifera Woodward, in Guppy, Quart. Jour. Geol. Soc. London, vol. 22, p. 572, plate 

 26, fig. 18, 1866; Quart. Jour. Geol. Soc. London, vol. 22, p. 591, 1866. 



Type locality.— Trinidad; San Fernando beds; geologic age not 

 positively known, probably upper Eocene. 

 Holotype.— Carapace without appendages. Cat. No. 115405, U. S. N. M. 



Ranina cuspidata Guppy. 



Ranina cuspidata Guppy, Bull. Agri. Dept. Trinidad, p. 5, plate, fig. 1, 1909; Agricultural 

 Society of Trinidad and Tobago, Paper No. 440, p. 14, 1911. 



Type locality.— Trinidad; Machipur,near Montserrat,in theTamana 

 district; "lower Miocene". 



Genus LYREIDUS de Haan, 1841. 



Lyreidus fastigatus, new species. 



(Plate 3, Figure 1.) 



Type locality. — Anguilla: Crocus Bay, southwestern side; 30 to 50 

 feet above sea-level; Anguilla formation; Oligocene series; T. W. 

 Vaughan, collector; March 4, 1914; 6966; L. I. 100 (1914). 



Holotype— Carpus joint of left cheliped. Cat. No. 166940, U. S. N. M. 



The following is a description of this species: 



The carpus is suboblong, about 11.6 mm. long by 5.6 mm. wide. The 

 surface is crossed transversely by fine rugae. A blunt ridge runs longitudinally 

 through the middle, following the axis of the segment, that is, slightly curved, 

 the concavity of the curve facing the left or outer side; this ridge is inter- 

 rupted at its distal end by a tubercle. On the inner margin at about its middle 

 there is a slender, curved spine standing well out from the segment; further 

 back at about the posterior fourth there is a smaller spine, broken off at its 

 base. Near the posterior end of the left side of the dorsal surface there is a 

 tubercle, or, it may be, a spine, the top being broken off. It is difficult to say 

 anything further of the details, as the margin is considerably obscured; the 

 segment appears to be strongly produced at its inner distal angle, and the 

 adjacent inner margin shows a small tooth. 



Other species of the genus. — Crema 2 has described a Lyreidus, L 

 paronce, from the Tertiary of Piedmont. He had, however, no part of 

 the chelipeds. 



1 Bull. Mua. Hist. Nat., Paris, p. 6, 1895. 



5 Atti R. Accad. Sci. Torino, vol. 30, p. 671, plate, fig. 11 (carapace), 1895. 



