1904.] EARTHWORMS FROM XEW ZEALAND. 225 



OcTOCH^TUS MicHAELSEXi, sp. n. (Text-fig. 45.) 



A single individual of this worm was collected by Capt. F. W. 

 Hutton at Wellington. It was broken into four or five pieces 

 when I received it ; in general appearance it agrees with other 

 species of the genus. 



Dimensions. About 210 x 8 mm. ; the number of segments was 

 not counted, as the worm was too greatly contracted and broken to 

 make the attempt profitable. 



The clitelluni, though not fully developed, appears to cover 

 segments 15 to 19. 



The porophores are in line of h, as also are the sperma thecal 

 pores, and their position on the body is lateral rather than 

 ventral, though of course on the under side. 



The chcetre liave the usual spaced arrangement, and, in spite of 

 examination of the skin, I was imable to detect them in front of 

 the tenth segment. 



The arrangement Ls as follows : d is a, little above the lateral 

 line, so that d-d is about i of the circumference, aa, = cd=l^ ah ; 

 ah = hc. The gap aa is wider in the clitellar and precliteUar 

 segments than posteinorly. 



Internal Anatomy, 



There are seven very stout septa, the last being behind the 

 12th segment. 



The dorsal vessel is double as far forward as segment 8, and 

 the last heart is in the 13th segment. 



Text-fig. 45. 



OctochcBtus micliaelseni. — Spermatheca (X 12): the diverticuluni is represented by- 

 several small saccules (D) embedded in the thickness of the muscular duct. 



The long gizzard is in the 6th segment, with the thin septum 

 five-sixtlxs attached near its anterior margin. 



The oesophagus bears a single pau^ of glands in the 15th seg- 

 ment and is well marked and hemispherical, though a good deal 

 compressed antero-posteriorly owing to the contractions of the 

 body. 



The intestine commences in the 16th segment. 

 Paoc. ZooL. Soc— 1904, YoL. II. No. XY. 15 



