POLYCTLETA. 323 



PLATE VI. 



Pig. L39. Cirrahihts cylindricus. Anterior region from above. 



,. 140. Head and mouth from below. 



., 141. Leprea inversa. Capillary seta from second setiger. 



142. ,, Geniculate seta from 45th setiger. 



.. 143. Polymnia labiata. Anterior end from below ; the bases of the tentacular cirri are indicated in 



front of the labium (= 1st and 2nd segments); the lateral lobes of the 3rd segment 



project beyond. 



144. Polymnia labiata. Thoracic uncinus in front view. Z. 3 D. 



,, 145. Uncinus from 9th torus in side view. Z. 3 D. 



., 14G. Polymnia socialis. Anterior region from below ; the epistome projects in front ; tentacles omitted. 



147. ,, Front view of a thoracic uncinus. 



,, 148. Side view of thoracic uncinus. Z. "> 1). 



,, 149. Polymnia triplicata. Anterior region from the right side; ep., epistome ; lab., labium. 



150. Epistome (ep.), labium (lab.), and mouth in frontal view. 



151. Uncinus in three-quarter view. Z. 3 J>. 



,. 152. Uncinus in side view. Z. 3 D. 



153. Loimia ammilifilis. Uncinus from third torus. Z. 3 D. 



1 r 1 . Anterior region from below, tentacles omitted; in front is the epistome, 



then the labium, then the lateral lobes. 



,, 155. Loimia medusa. Anterior region from below. 



,, 156. ,, var. angustescutata, showing additional tori and capillary fascicles. 



,, 157. ,, Uncinus from first torus. Z. 3 D. 



158. ,, Uncinus from fourth torus. Z. 3 D. 



159. ,, Abdominal uncinus. Z. 3 D. 



,, 160. Loimia montagui. Anterior region from below. 



161. Quinquedentate uncinus from first torus. Z. 3 D. 



,, 162. Sexdentate uncinus from first torus. Z. 3 D. 



163. Uncinus from 13th torus. Z. 3 D. 



PLATE VII. 



Fig. 1G4. Grynuea cespitosa. Anterior end from the right side. The small circles in the first branchial 

 acervus are the scars of branchial filaments. 

 ,. 165. Grynuea cespitosa. Uncinus. Z. 3 D. 

 166. Branchiomma acrophthahnos. Spatulate seta from thorax. 



167. ,, Anterior end from above. In front the gill-bases are shown on 



each side, the radioles being omitted. 

 / '' !.. ''/ ithitinn. Buccal segment and cephalic complex from below. 



169. Uncinus. Z. 3 D. 



170. Dasychone cingulaia. Average superior thoracic capillary seta. Z. 3 C. 

 171. Thoracic uncinus. Z. 3 D. 



,,172. Portion of a gill-radiole showing stylodes and eyes and the bases of the 



gill-filaments. 

 173. Ewato porifera. Anterior thoracic region from above. 



2 T 2 



