468 BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



Porto Rico; off Boca Prieta; Fanduco Cay, E. 1^ m.; S}^ fathoms; 

 Co. S.; January 25, 1899; station 6075, Fish Hawlc; 1 female (24092). 



St. Thomas; 1915; C. R. Shoemaker: From piles; 2 males, 2 fe- 

 males (1 ovigerous) (50954). From piles near town; July 7; 1 fe- 

 male, thin shell (50955). Gregerie Channel, between Water Island 

 and St. Thomas; }4-2^ fathoms; July 7; station 7; 2 females (1 

 ovigerous) (50956). 



English Harbor, Antigua; shore; 1918; Barbados-Antigua Exped. 

 Univ. Iowa; 1 ovigerous female, overgrown with sponge (Mus. S. U. I.) . 



Port Castries, St. Lucia; November 30, 1887; Albatross; 1 male 

 (21930). 



Curasao: 1884; Albatross; 1 male, 2 females (1 ovigerous), 2 young 

 (16181). Rifwater. in shallow water, among algae; May 26, 1905; 

 J. Boeke; 1 male (Leiden Mus.). Spanish Water; from mangrove 

 roots; April 8, 1920; C. J. van der Horst; 1 young (56863). 



Brazil; off Cape St. Roque; lat. 6° 59' 30" S.; long. 34° 47' 00" 

 W.; 20 fathoms; brk. Sh.; December 16, 1887; station 2758, 

 Albatross; 1 female (21931). 



MACROCOELOMA TRISPINOSUM, variety 



Plate 168, fig. 1 



Pericera trispinosa von Martens, Arch. f. Naturg., vol. 38, pt. 1, 1872, p. 84, 

 pi. 4, figs. 4 a and 4 c, not 4 b, and 4d. — A. Milne Edwards, Crust. R6g. 

 Mex., 1873, p. 52, pi. 15, figs. 2. -2d.— Ives, Proc. Acad. Nat. Sci. Phila- 

 delphia, 1891, p. 178. 



Description. — This form links the subspecies nodipes to the typical 

 trispinosum. The carapace is a little narrowed beliind the orbits. 

 The postero-lateral prominences are wider than in typical trispinosum 

 and approach the laminate character of nodipes. The four central 

 bosses are intermediate in character, as is also the orbital margin. 



Color. — Vermilion (Bartsch) ; bright scarlet (Ives) . 



Range. — From North Carolina to Gulf of Mexico and Yucatan 

 (Ives) ; West Indies and Caribbean Sea. Low water to 28 fathoms. 



Material examined. — See table, pages 470-471. 



MACROCOELOMA TRISPINOSUM NODIPES (Desbonne) 



Plate 166, fig. 2; plate 168, fig. 2 



Pericera nodipes Desbonne, in Desbonne and Schramm, Crust, de la Guade- 

 loupe, 1867, p. 15, pi. 5, fig. 13 (type-locality, Guadeloupe; type perhaps 

 not extant). 



Macrocoeloma trispinosum Verrill, Trans. Connecticut Acad. Arts and Sci., 

 vol. 13, 1908, p. 414, text-fig. 44. 



Diagnosis. — Postero-lateral projections very broad laminae, mar- 

 gins continuous with those of carapace. Four dorsal bosses smoothly 

 rounded. 



