632 A. E. Verrill — lurbellaria, Nemertina^ and 



Analytical table of the Genera of Bermudian Syllidm., described 



above. 



I. — Palpi large, separate to their bases. 

 A. — CEsophagus with only a single median tooth. Antennae and cirri monili- 



form. 

 B. — Parapodia without a branchial lobe. 

 C. — Median tooth near anterior end of CBSophagiis. 



D. — Margin of oesophagus entire or nearly so. Sijllis. 



a. — Setfe all compoiind and similar, but differing somewhat in relative length 

 of blades. Subgen. , Typosyllis. 



aa. — Upper anterior setse with abruptly longer, narrow blades. 



Subgen., Ehlersia. 

 aaa. — Setse few, siinple, without blades ; end bidentate. HctplosylUs, sp. 



DD. — Margin of oesophagus dentate or serrulate. 

 b. — Margin serrulate or finely dentate. 



c. — Setfe all, or in part, compound. Eusyllis. 



ce. — Anterior setae compound ; those of middle region mostly two-pronged 

 crotchets. Synsyllis. 



ccc. — Seta? few ; all simple with bidentate ends. Ha]ilosyUis. 



bb. — Margin strongly dentate or scalloped. 



d. — CEsophagus straight. Trypanosyllis. 



dd. — CEsophagus folded, slender. Pterosyllis. 



CC. — Median tooth of cesophayus near its posterior end ; margin entire ; open- 

 ing wide. A buccal collar. Setae mostly compound ; blades acute. 



Opistliosyllis. 

 BB. — Parapodia with a branchial lamella. Setae all compound, "with acute, 



claw-like blades. Branchiosyllis. 



AA. — CEsophagus short, with a ventral row of recurved teeth. Cirri not moni- 

 liform. Setae compou.nd, with acute, incurved blades. 



OdontosylHs. 

 II. — Palpi large, more or less united medially. CEsophagus with a median 



tooth. 

 e. — Palpi only partially united. Antennee and cirri long, moniliform. 

 g. — Setae all simple with bidentate ends. Hemisyllis. 



fjg. — Setae mostly compound ; simple setfe acute. Desmosyllis. 



ee. — Palpi united nearly or qiiite to their tips. Antennte and cin-i short, fusi- 

 form, not moniliform. Buccal segment distinct, with 2 pairs of ten- 

 tacular eiri'i. Grubeosyllis. 

 III. — Palpi small, or rudimentary, or wanting. 

 E. — Head normal ; oesophagus and stomach well-developed. 



Stem-form of Autolytus. 



EE. — Head abnormal. Eyes large. CEsophagus and stomach wanting or 



rudimentary. Capillary setae usually present. (Sexual zooids.) 



/. — Antennae and tentacular cirri present. $ ^«<oZi/<iis. 



ff. — Antennae and tentacular cirri absent. Tetraglene. 



fff. — Tentacular cirri absent. Chcetosyllis 



