Annelida of the Bermudas. 607 



Setae are long and abundant ; the upper anterior ones have narrow 

 lanceolate blades, 3 to 4 times as long as broad, with slightly biden- 

 tate tips ; the lower ones are only about 2 times as long as broad, 

 with incurved tips. 



The oesophagus is stout and rather short, occupying T segments, 

 cylindrical, about ^ shorter than stomach and nearly as thick ; it is 

 unusually translucent, lacks the brown chitinous color seen in most 

 species ; its tooth is near the margin, which is not well defined, but 

 seems to be entire. The stomach is long and thick, cylindrical, and 

 occupies 9 segments ; it is crossed by numerous crowded rows of 

 rounded granules. 



Color of type, in formalin, pale greenish brown, each anterior seg- 

 ment crossed by a j^ale narrow sutural line and sometimes by a 

 darker brown middle line ; posterior half of the body has a row of 

 squarish spots along each side at the bases of the parapodia. Length, 

 •SO"^"^; diameter, 1.5"". 



The posterior end, in the type, is changed into a Tetraglene- 

 zooid, back of the 110th setigerous segment. The new head has 

 four very large and prominent black eyes with lens, but lacks all 

 other appendages, the eyes are in contact on each side. There is no 

 buccal segment, the first segment is very short and has setae. All 

 the 20 segments bear fascicles of long, slender capillary setae, longer 

 than the bi'eadth of the body, and a smaller number of compound 

 setae. The doi'sal cirri have been lost. 



The parapodia ai'e large and prominent, as long as half the breadth 

 of the segments. 



Syllis (Tetraglene), sp. 



In a small collection of plankton, taken in the latter part of May, 

 there are several specimens of a Tetraglene somewhat similar to the 

 above, but evidently a distinct species. 



The head is much shorter and smaller, with very much smaller, 

 separated, light brown eyes. The body itself is larger and much 

 stouter, with 24 crowded, broad segments and short, rounded para- 

 podia. The dorsal cirri equal about \ the breadth of the segments, 

 and are regularly beaded and tapered. The caudal cirri are not 

 tapered, as long as the dorsal cirri, and strongly beaded with about 

 10 annuli, the distal beads are nearly round. Large fascicles of 

 slender compound setae are present on all the segments, with short 

 terminal blades, 1^ to 2 times as long as broad, part of them very 

 minutely bidentate at tip. No capillary setaj are present on either 

 specimen, A row of rather dark, round spots runs along each side, 

 a spot being at the base of each parapodiura. 



