110 Bulletin, Vanderbilt Marine Museum, Vol. II 



long as the width of the carapace between the eyes, while the same 

 articles in the female are only three-fifths as long or less. 



The ambulatories are similar, stocky, with stout, curved, acuminate 

 dactyli. 



The female abdominal belt is large, subcircular, with the median 

 line vaulted. The male belt is narrow, with the tip rounded, trian- 

 gulate. 



Synonymy. — Cancer 9, Browne, Nat. Hist. Jamaica, 1756, p. 422, pi. 

 48, fig. 2. 



Tisa trispinosa Latreille, Encycl. Meth. Hist. Nat., vol. 10, p. 142, 



1825. 

 Pericera trispinosa Guerin, Icon. K-egne Anim. Crust., pi. 8, figs. 3, 



3a, 1825. — H. Milne Edwards, Hist. Nat. Crust., vol. 1, p. 336, 



1834. — Aurivillius, K. Sv. Vet. Akad. Hand., vol. 23, pt. 1, p. 55, 



pi. 2, fig. 2, 1889. 

 Pericera dicantha A. Milne Edwards, Crust. Reg. Mex., p. 57, 1875. 

 Pericera diacantha A. Milne Edwards, op. cit., pi. 15, figs. 3-3a. 

 Macrocoeloma trispinosa Miers, Journ. Linn. Soc. London, vol. 14, p. 



665, 1879. 

 Macrocoeloma diacantha Miers, Voy. Challenger Kept. Zool., vol. 17, 



p. 79, 1886. 



Macrocoeloma trispinosum Rathbun, Proc. U. S. Nat. Mus., vol. 21, 

 p. 576, 1898 ; Bijdragen tot de Dierkunde, natura artis magistra, 

 Afl. 23E, 1924, p. 21; Bull. 129, U. S. Nat. Mus., p. 466, pi. 

 166, fig. 1, pi. 167, 1925.— Boone, BuU. Bingham Oceanog. Coll., 

 vol. 1, art. 2, p. 40, 1927. 



Macrocoeloma diacanthus Rathbun, Proc. U. S. Nat. Mus., vol. 21, 

 p. 576, 1898. 



Genus : MICROPHEYS H. Milne Edwards. 

 Microphrys bicomutus (Latreille). 



Plate 32, Fig. A. 



Diagnostic characters : Carapace subtriangulate, produced into a 

 spine at each lateral angle; rostral horns divergent, from one-third 

 to one-half as long as carapace. Chelipeds equal, moderate, speckled 

 with numerous large, purplish magenta spots. 



