DESCRIPTIONS OF GENERA AND SPECIES 407 



The colour when alive is described as being ' above of a nearly uniform brown with 

 a tinge of green, lighter below.' 



(13) Perichaeta sluiteri, Hobst. 

 p. sluiteri, HoRST, Notes Leyd. Mas., vol. xii, 1890, p. 234. 

 Definition. Length, 190 mm.; number of segments, 135. CUtellum without setae. Setae, 

 •50-75 {in the caudal region); closer as well as longer ventrallij. Dorsal pores commence 

 XI/XII. Intestine begins in X7. Hearts in X-XIII. Septa r/VIII thickened. Sperma- 

 thecae in Fill, IX; diverticulum bent like a 'Pan's pipe^ swollen at end. Spermiducal 

 gland bilobed, duct longisA and bent. Rab. — Billiton. 



(14) Perichaeta queenslandica, Fletcher. 

 P. Queenslandica, Fletcher, Proc. Linn. Soc, N. S. W., vol. i (a), 1886, p. 962. 



Definition. Length, 1^0 mm.; breadth, jmm.; number of segments, lao. CUtellum, XIV-XVI 

 with setae. Male pores separated by fourteen setae, 5 mm. apart. Setae, 60 per segment. 

 Genital papillae : on XFII, XIX, XX, XXI a pair of papillae in front of line of setae ; 

 between XYII/XVIII, XVIII/XIX other pairs; on IX-XI in front of line of setae. 

 Dorsal pores commence XIIJXIII. Gizzard in YII, VIII (?) ; caeca in XXF, reaching 

 to XXI. Septum YII-YIII absent. Hearts in (?) XII. Spermathecae in YI-IX. One 

 pair of testes and funnels in XI. Spermiducal glands in XYIII-XXI ducts short. 

 Hob. — North (Queensland. 



This species must, I imagine, be in some respects inaccurately described by 

 Fletcher. At any rate it is desirable to have the anomalous position of the 

 gizzard confirmed. That there is an inaccuracy here appears to be shown by his 

 placing the origin of the intestinal caeca in xxv instead of in xxvi ; however, the diver- 

 gence is particularly mentioned in the text, so that Fletcher has, in all probability, 

 verified carefully the difference. It is not clear in which segments the spermathecae 

 lie. They are said to be in segments v-viii, but the apertures are described and 

 figured as being between v/vi-vii/ix ; it may be, of course, that they open posteriorly. 

 The existence of a single pair of testes and sperm-duct funnels is remarkable, but 

 it seems also to occur in P. vitiensis. 



Fletcher has figured (2, PI. xiii, fig. 6) the external characters of this species. 



(15) Perichaeta violacea, new species. 

 Definition. Length, about two inches. Colour dwring life a red violet upon the upper 



