NO. 1 HARTMAN : GONIADIDAE, GLYCERIDAE, NEPHTYIDAE 33 



Goniada teres Treadwell, revised 



Treadwell, 1931, pp. 5-6, figs. 9-12. 



Material examined. — Type specimen from Montego Bay, Jamaica, 

 in the American Museum of Natural History, catalogue number 2068. 



This is a long, slender species, as first described. The proboscis as 

 originally shown (Treadwell, 1931, fig. 19) is not fully everted as was 

 presumed, but only halfway, thus the distal structures were not ob- 

 served. Oral paragnaths are present and lie within, just behind the 

 peristomial ring. The species is thus not unique for lacking these struc- 

 tures. The length of the everted proboscis was given as 9 mm; actually 

 it would be about 18 mm if fully thrust out; its width is less than 

 0.4 mm. 



The first 49 segments are uniramous; a small notopodium is first 

 present at the fifteenth and in 8 segments it is abruptly larger; the 

 transition region is short, including about 8 or 9 segments. 



The prostomium has a long basal ring and 9 shorter more distal 

 ones; the distal one is somewhat truncate triangular and has the 4 

 biarticulate antennae attached to it, the more anterior pair below and 

 the second, slightly larger pair somewhat behind and above the anterior 

 ones. The distal article is tiny, beadlike, the basal one long, clavate. 

 Prostomial eyes have not been distinguished. 



The proboscis is very long, cylindrical and only half everted. The 

 chevrons are paired, near the base, number 10 on a side. Numbered 

 from the base of the prostomium the basal piece is slenderest and broad- 

 ly V-shaped. The seventh to ninth pieces are the largest and the tenth 

 (last) piece is most sharply acute and short. Macrognaths are dark 

 brown and sharply toothed, with 3 larger and one or 2 smaller points. 

 The largest tooth is at the dorsal end, and the smallest at the ventral 

 end. Dorsal and ventral arcs of micrognaths are present, most numerous 

 in the first; they number about 10 larger and nearly as many smaller 

 pieces in an irregular row (retracted); the ventral ones are similarly 

 arranged but the number perhaps only 8 larger and some smaller pieces. 



The proboscidial organs are about evenly distributed over the pro- 

 boscidial length. All are of one kind and similar in size. They are well 

 spaced from one another so that the uncovered surface of the proboscis 

 is several times that which is covered. Each organ is of the kind shown 

 for Glycinde armigera, piece III (see plate 6, fig. 6), or similar 

 to those of Goniada littorea (pi. 3, fig. 9). Each is a hard, chitinized 

 hemispherical process with an upper pore and a sharp tooth at the end 

 directed away from the gnathal end; a much shorter process is at the 

 opposite side of the distal pore. 



