A rOLYNOID WITH BRANOHI/E. 449 



EXPLANATION OF PLATE 37, 



Illustrating Miss Florence Buchanan's paper, " A Polynoid 

 with Branchiae (Eupolyodontes Cornishii)/^ 



Fig. 1. — Dorsal view of head' and first ten segments of Eupolyodontes 

 Cornishii. The elytra are represented as turned aside from their normal 

 position to show the parapodia. Very slightly enlarged only. t. One of the 

 paired prostomial tentacles. 



Fig. 2. — Ventral view of head and first five segments. 



Fig. 3. — Dorsal view of three segments some five or six inches from the 

 anterior end. The elytra left in their normal position on the left side only. 

 Turned aside to show the "branchiae " on the right. 



Fig. 4. — View from behind of a non-elytriferous parapodium. from about 

 the 50th segment, d. c. Dorsal cirrus, ac, Acicle, seen projecting behind 

 the cut end of sp. gl., the spin-gland, d. s. Dorsal chajta. sp. Spines or 

 short stiff chsetai of comb. v. s. Ventral chsetse bundle, cap. Silky thread 

 formed of capillary clisetse of spin-gland, drawn out from the aperture of the 

 gland. 



Fig. 5. — Similar view of an elytriferous parapodium taken from a more 

 posterior segment, showing the swollen elytron. The branchial filaments have 

 become much fewer in number. 



Fig. 6. — A single " branchial " tuft from a segment where they are well 

 developed. 



Fig. 7. — Transverse section of one of the " branchial " filaments, c. Cuticle. 

 ep. Epidermis laden with concretions, c.t. Nucleus of connective tissue (?). 

 c. cav. Central cavity, n. Nucleus in its wall. 61. (?) A blood-vessel (?). 



Fig. 7a. — A portion of the epidermis of the same section, enlarged to show 

 the nucleus (n.) of an epidermis cell. 



Fig. 8 a. — Tip of a dorsal chseta. 



Fig. 8 b. — Tip of one of the spines. 



Fig. 8 c. — Tip of one of the chsetse of ventral bundle. There is not always 

 such a marked difference at the apex, as there is in the one here figured. 



Fig. 9.— Dorsal view of head and first segment of Polyodontes maxil- 

 losus, much enlarged. 



' " Head " here is used to include the prostomium and first or buccal 

 segment which is fused with it. 



