60 BULLETIX 152, UNITED STATES NATIONAL MUSEUM 



PORTUNUS (PORTUNUS) VOCANS (A. Milne Edwards), new combination 



Plate 25 



Neptumis vocans A. Milxe Edwards, Bull. Soc. Philom. Paris, ser. 7, vol. 2, 

 1878, p. 225 [6] (type-locality, Cape Verde Islands; type in Paris Mus.). — 

 A. Milne Edwards and Bouvier, Exp^d. Sci. Travailleur et Talisman, 

 1880-1883, Crust. D6c., part 1, 1900, p. 68, pi. 14, figs. 6-9. 



Neptunus {Amphitrite) vocans Miers, Challenger Rept., Zool., vol. 17, 1886, p. 174. 



Diagnosis. — Four large tubercles on gastric region. A slender 

 spine at posterior angles of carapace; a stridulating ridge on lower 

 surface. Chelipeds stout, ambulatory legs slender. 



Description. — Carapace granulate and covered with a thin short 

 pubescence. Four pointed granulate tubercles are arranged on the 



Figure 8.— Portunus (Portunus) vocaxs, male (6930), carapace 23.5 mm. wide, dorsal 



VIEW 



gastric region in a light transverse curve concave forward. Behind 

 these a transverse line of fine granules interrupted on the median line; 

 beyond the cervical suture the granules are coarser, the line slightly 

 sinuous for half the width of the branchial region where it turns diag- 

 onally backward and outward across the middle of the lateral spine. 

 On this line of granules there is at the branchial angle a low elevation 

 surmoimted by a small tubercle, behind which are two broad trans- 

 verse low and well separated tubercles. Cardiac region with a trans- 

 verse granulate ridge widely interrupted at middle. Front arcuate, 

 four broad teeth, those of median pair narrower, rounder, and more 

 advanced than the lateral; median sinus narrower than lateral. Pre- 

 orbital tooth acute, little prominent. Antero-lateral teeth denticu- 

 late, increasing in length and sharpness from the first to the eighth, 



