482 BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



Porto Rico; 1899; Fish Hawk: Guanica Bay, on coral reef; January 

 28; 1 male (24139). Playa de Ponce Reef; Feb. 1; 1 male (24140). 

 Ponce; 1 male (24141). Fajardo; Feb. 17; 2 males, 1 female (24200). 



St. Thomas: 1884; Albatross; 1 female (16183). A. H. Riise; 1 

 immature female, cotype (1227, M. C. Z.), 1 male, cotype (1243,. 

 M. C. Z.) ; received from Smithsonian Institution. 



Guadeloupe; Saussure; specimens in Geneva Mus. 



Barbados; 1918; Barbados- Antigua Expedition, University of 

 Iowa: 1 female (Mus. S. U. I.). Bathsheba; 1 ovigerous female 

 (Mus. S. U. I.). Pelican Island; tide pools; May 11; 1 immature 

 female (Mus. S. U. I.). Shallow water, under large anemone; 1 

 ovigerous female (Mus. S. U. I.). 



Old Providence Island, Caribbean Sea; 1884; Albatross; 1 female 

 (16184). 



MACROCOELOMA VILLOSUM (Bell) 



Plate 269, figs. 4-7 



Pericera villosa Bell, Proc. Zool. Soc. London, vol. 3, 1835 (1836), p. 173 



(type-locality, Gulf of Guayaquil; type not extant); Trans. Zool. Soc. 



London, vol. 2, 1836, p. 59, pi. 12, figs. 4, 4 k-n. — Nobili, Boll. Mus. Zool. 



Anat. Comp. R. Univ. Torino, vol. 16, No. 415, 1901, p. 30. 



Pericera fossata Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860, p. 



181 (type-locality. Cape St. Lucas; type not extant). 

 Macrocoeloma villosa Miers, Challenger Rept., Zool., vol. 17, 1886, p. 79. 

 Macrocoeloma villosum Rathbttn, Proc. U. S. Nat. Mus., vol. 38, 1910, pp. 

 574 and 616. 



Diagnosis. — Postero-lateral spines directed for- 

 ward. Protuberances of carapace deeply separ- 

 ated. Rostral horns very divergent. 



Description (after Bell and Stimpson) . — Surface 

 everywhere covered with a uniform short, dense, 

 closely adhering pubescence. A few curled setae 

 on the rostrum, and on the concave antero-lateral 

 slopes of the carapace. Lateral processes long, 

 blunt, and a little curved forward. The regions 

 of the carapace are protuberant and separated 

 by very deep sinuous pits or channels, appearing 

 Fig. 135.— Macrocoeloma somcwhat as if eaten out; but the protuberances 

 VILLOSUM, GUAYAQUIL, themsclves are not vermiculated. Rostrum as 



MAXiLLiPED. (After ^ -,■ ■, i i t 



Bell) loug as distance between eyes; the horns diverge, 



the distance between their tips equaling about 

 two-thirds or three-fourths that between the orbits. 



Spine of basal segment of antennae slender, reaching considerably 

 beyond the preorbital tooth. 



The abdomen of the female has a deep, vermiculated furrow on 

 each side of the median rounded ridge; also channeled sutures. 



