NICOLEA TABOGUILLAE. 425 



to be at least twenty-eight. The setae begin on the foui'th somite, the uncini 

 on the fifth. 



There are only fourteen ventral plates, these beginning on the second body- 

 somite, as above indicated. The third ventral plate in the type is much shorter 

 than either the second or the fourth. The plates from the second to the ninth 

 are of nearly uniform width and length, the remaining ones decreasing gradually 

 caudad. 



The setae are nearly straight proximad of the especially prominent fringed 

 tip. The distal portion is gradually but moderately narrowed, and has a very 

 narrow limbus on each side. The apical portion bends out at a conspicuous 

 angle with the stalk and is drawn out into a long, slender, bristle-like tip. It is 

 proximally fringed along its upper edge. The shaft has the usual finely fibrillar 

 structure. (Plate 79, fig. 7). 



The uncini are uniseriate on somites anterior to the eleventh somite. On 

 the eleventh and succeeding thoracic somites they are in two opposed series. 

 The base of an uncinus is short, with the dorsal edge strongly convex, its process 

 being obtusely angular, or somewhat rounded, and rather conspicuous. The 

 subrostral process is situated well toward the toe of the plate. The main hook, 

 or beak, is stout, long, and acute, and in the usual strongly uncate position. The 

 sinus beneath it has the sides moderately divergent. The prominent crest 

 above the beak bears numerous teeth arranged in three or four transverse series. 

 (Plate 79, fig. 8). 



The anus is bordered by a moderately elevated rim which is transversely 

 ridged. 



Locality. Panama: Perico Island. Shore. 26 October, 1904. One speci- 

 men. 



In the form of the setae this species much resembles T. pacifica Moore, 

 known from off the coast of San Diego, Cal., and northward; but in the structure 

 of the uncini it is clearly different. 



Nicole A Malmgren. 



Ofvers. K. vet. akad. Forh., 1865, 22, p. 380; St. Joseph, Ann. sci. nat., 1894, scr. 5, 17, p. 182. 



NiCOLEA TABOGUILLAE, sp. nov. 



Plate 79, fig. 12, 13. 



The present species evidently lies in a group with A^. bilobata. The typical 

 specimens are smaller than galapagensis and larger than bilobata. The type, 



