THE SPIDER CRABS OF AMERICA 



477 



(43 mm.) (Bell). Young female (21933), total length 10.6, total width 

 of carapace 10.6 mm. 



Range. — From Cape St. Lucas, Lower California, Mexico, to 

 Panama Bay. 13 to 31 fathoms. 



Material examined. — 



Off Cape St. Lucas; lat. 22° 52' 00" N.; long. 109° 55' 00" W.; 

 31 fathoms; rky.; temp. 74.1° F.; 

 May 1 , 1888 ; station 2829, Albatross; 

 1 3^oung female (21933). 



Panama Bay; lat. 8° 10' 30" N.; 

 long. 78° 50' 30" W.; 18 fathoms; 

 gy. S.brk. Sh.; Mar. 5, 1888; station 

 2798, Albatross; 1 young female 

 (21932). 



MACROCOELOMA SEPTEMSPESfOSUM 



(Stimpson) 



Plate 173, figs. 2 and 3 



_ . M ■ r^ FiG- 133.— MACROCOELOMA HEPTACANTHUM, 



Pericera septemspmosa Stimpson, maxilliped (After Bell) 



Bull. Mus. Comp. Zool., vol. 2, 1871, 



p. 113 (typ^-locality, west of Tortugas, 36 fathoms; type not extant). — 

 A. Milne Edwards, Crust. Reg. Mex., 1873, pp. 59 and 200, pi. 15 A, 

 figs. 2-2c. — Perhaps Pericera septemspinosa Gundlach and Torralbas, 

 An. Acad. Habana, vol. 36, 1899 (1900), p. 366, text-fig.; reprint, 1917, 

 p. 21, pi. [5], fig. 13. 



Macrocoeloma septemspinosa Miers, Challenger Rept., Zool., vol. 17, 1886, 

 pp. 79 and 80. 



Diagnosis. — Seven sharp spines on posterior half of carapace. A 

 prominent subhepatic spine. Preocular spine 

 erect. Rostral horns divergent. 



Description. — Carapace oblong-triangular, 

 strongly convex, pubescent and hairy; antero- 

 lateral and postero-lateral sides concave. 

 Dorsal surface armed with seven prominent 

 spines, one on the gastric, one on the car- 

 diac, one on the intestinal, and two on each 

 branchial region in line with the cardiac 

 spine; spine at lateral angle transverse. Ros- 

 trum about one-fifth as long as the entire 

 carapace, deflexed; horns subtriangular, 

 curved, acute, divergent, pointing obliquely 

 outward. Orbits projecting obliquely forward, outward and up- 

 ward, with a prominent, acute, preocular and postocular spine^ 

 the former suberect, and much more elevated than the postocular 



Fig. 134.— Macrocoeloma hep- 

 tacanthum, female (21932), 

 basal antennal article, with 

 postorbital lobe, x 12 



