8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. QI 



rather distinctive. Verrill's ^ account of H. artifex states that gill- 

 first appear on about the twenty-eighth somite and are never of more 

 than one filament. 



Type. — U.S.N.M. no. 20034, collected at station 84, latitude i8°32' 

 30" N., longitude 65° i8'3o" W.— latitude i8°39' N., longitude 65° 

 17' W., in 300 fathoms, north of Culebra Island. 



ALCIOPA Audouin and Milne Edwards 

 ALCIOPA MUTILATA, n. sp. 

 Plate 2, figs. 20, 21 



This species name is provisionally suggested for a fragment of 

 an Alciopa retaining only a limited portion of the anterior body 

 region. Its total length is 7 mm and width at the eyes 1.5 mm. The 

 eyes are very large and almost in contact dorsally, their lenses point- 

 ing downward and outward so as not to be visible from a dorsal 

 view. Ventrally, they are more widely separated (fig. 20). The 

 median tentacle (fig. 20) is very short and inconspicuous and is 

 located well forward between the eyes. All frontal tentacles are 

 thick, the dorsal pair being a trifle smaller than the ventral ones. 

 Between the dorsal frontal and the median tentacles is a pair of 

 fleshy lips. The anterior face of the first somite is in contact with 

 the eyes but does not enclose them in a cup efifect, as it does in other 

 species. 



The parapodia are conical in outline, and a single acicula protrudes 

 at the apex (fig. 21). Only a very few setae are present, most of 

 them having been broken. Those that remain have sharp-pointed 

 ends, and this undoubtedly holds for all. 



Type. — U.S.N.M. no. 20035, collected at station 6 in latitude 

 i8°3o'45" N., longitude 66°4'3o" W.— latitude i8°3o'5o" N., longi- 

 tude 66°i'i5" W., north of Puerto Rico, in 100 fathoms. 



Family MALDANIDAE 



MALDANELLA FIMBRIATA, n. sp. 



Plate 2, figs. 22-24 



The collection contains one slender specimen 35 mm long and 2 mm 

 wide, composed of 20 setigerous somites. The anterior margin of 

 the cephalic plate (fig. 22), is broadly rounded but is not continued 



I 



^ Verrill, A. E., Notice of recent additions to the marine invertebrata of the 

 northeastern coast of America, with descriptions of new genera and species and 

 critical remarks on others. Pt. 5, Annelida, Echinodermata, Hydroida, Tunicata. 

 Proc. U. S. Nat. Mus., vol. 8, pp. 429-431, 1885. 



