174 Marine Investigations in South Africa. Vol. V. 



apart, about twelve of them being between the genital folds, by 

 which a few of the anterior of the twelve may be hidden. 

 Further back they are normally in pairs, one on each side of the 

 body opposite each other, but in extensions of the body they were 

 -often seen to interdigitate, thus alternating on each side. Posteriorly 

 they gradually diminished, the whole length of the hepatic tract 

 being about half the length of the genital ridge, or one-third of the 

 tail region. 



In colour the hepatic coeca varied considerably, being, however, 

 always dark brown in the central region. Anteriorly and posteriorly 

 they were more or less light in colour, sometimes pinkish. 



Tail Region. — The tail region was a little over half the total 

 length, and did not vary much in thickness, being about equal to 

 that of the middle of the hepatic region, which was a little over half 

 the diameter of the collar. The most prominent feature was the 

 presence of three lines running along nearly the whole length of the 

 upper surface, the central one of these being the dorsal nerve chord, 

 and one on each side being a thin yellowish streak, which com- 

 menced about the middle of the hepatic region and continued to near 

 the extremity of the tail. In other species in which such streaks 

 are described they are situated in a groove which passes through the 

 "islet" like cross-bands of glandular tissue. Here, however, these 

 bands pass over them so that epidermal furrows were absent on the 

 dorsal surface, one of the most distinctive external characteristics of 

 this species. 



On the ventral side the yellowish ventral nerve chord occurs, and 

 interrupts the glandular patch throughout its w^hole course from the 

 collar to the anus ; in contrast to the dorsal nerve it thus lies 

 in an epidermal groove. 



On the dorsal side of the tail these glandular patches of the 

 epidermis are of no great length transversely to the body, but on 

 the ventral side they appear almost like annulations. 



SUMMAEY. 



(1) Phronopsis, a new genus of the Phoronidea, differing from 

 Phoronis chiefly in having an involution of the epidermis with 

 definitely differentiated (cubical) cells. The involution occurs below 

 the nerve ring, which it partly covers ; it passes round the body, 

 encircling the mouth, anus, and nephridial apertures. 



(2) Phoronis capensis, a new species, closely related to P. 

 Jiij^pocrepia. 



(3) In Phoronis capensis the following observations, some of 



