2 34 DISCOVERY REPORTS 



is large and is similar to that of C.fuscus. There is a strong dorsal branch to the massive 

 dorsal ganglion. In the absence of notes on the form and colour during life I hesitate 

 to separate this form from C. fuscus, which anatomically it closely resembles. 



Order HOPLONEMERTEA 



Sub-order MONOSTILIFERA 

 Genus Emplectonema, Stimpson 



Emplectonema ophiocephala (Schmarda), 1859 (Plate XV, fig. 14; Figs. 11, 12). 



Thirty-eight specimens were captured between June and September in kelp roots 

 from rocks between tide-marks inside and outside the Bay. The usual length was about 

 25 cm., breadth 1-1-5 mm. The largest worm was 40 cm., greatest breadth 2-0 mm. 

 The majority were mature and in consequence rather swollen. In one specimen the gut 

 was full of grey mud. Damaged worms were frequent as the body is very soft. 



Form and colour during life. The body is long and soft. A distinction can be drawn 

 between head and body, as the posterior end of the flattened lanceolate head is slightly 

 broader than the succeeding part of the body. Anteriorly the head tapers to an acute 

 snout. Neither mouth nor cephalic slits can be seen, but occasionally a pair of faintly 

 marked sloping lateral grooves are apparent behind the head. Deep transverse wrinkles 

 appear when the body contracts. The colour is generally yellow, but may vary from 

 lemon yellow or yellow-brown to reddish or orange. The head and tail are paler than the 

 rest of the body. There are elongated groups of small eyespots on each side of the head — 

 about twenty in each group— spreading out somewhat posteriorly. In small worms 

 (6-7 cm. long) there are from four to twelve eyes visible on each side. The brain shows 

 as a pinkish, brownish or greyish bilobed structure through the skin just behind the 

 groups of eyespots (Fig. 11 A). The genital sacs show white through the skin. 



Form and colour of preserved specimens. The worms frequently contract violently and 

 break up during preservation. In spirit they are bleached, and the form is often dis- 

 torted by bulges and knot-like swellings. The eyes and cephalic slits are not visible. The 

 proboscis pore is just beneath the tip of the head. On clearing in anilin oil the brown or 

 black cup-shaped eyes can be seen. They vary greatly in number from seven or eight on 

 each side to thirty. When seen partly from the side (Fig. 1 1 B) or from above, each group 

 can be divided into two rows. The eyes of the outer row open forwards, those of the 

 inner row backwards and upwards. There are usually more eyes in the inner row, but 

 they are smaller than those of the outer. 



Internal structure. The oesophagus opens into the rhynchodaeum. The gut is 

 capacious. Behind the rhynchocoel it occupies the entire body cavity. The anterior 

 caecum does not extend far forwards (it does not appear in either of my two series of 

 sections). Frontal organs are absent. The head glands consist of a thin solid strand, 

 staining with eosin, dorsal to the rhynchodaeum, extending back, thinning out and dis- 

 appearing before the separation of the oesophagus and rhynchodaeum. Near the tip of 



