122 Mr. F. E. Beddard on the 



the worm it is identical. "Perichceta leucocycla'''' is there- 

 fore tlie same species as Megascolex avriJeus, in spite of the 

 differences of colour shown in Schmarda's figure and in 

 Bourne's *. 



The synonymy of the species will therefore stand thus : — 



Megascolex cceruleus, Templeton, Ann. & Maof. Nat. Hist. 184-5, p. 60. 

 Perich(sta leucocycla, Schmarda, Neue wirbell. Thiere, Bd. i. Ilalfte ii. 



p. 13. 

 Pleurochceta Moseleyi, Beddard, Trans. Roy. Soc. Edinb. vol.xxx. p. 481. 

 Megascolex Moseleyi, Vaillant, Annel^s, Suites a Buffon, t. iii. p. 67. 



^^PerichcpM cingulata^'' Schm. 



The collection contains two specimens, one of which is 

 the type of Schmarda's species. This is sexually mature, so 

 that 1 can describe its external characters more accurately 

 than has been hitherto done. Vaillant f apparently con- 

 founded several species together under the name of Pericheta 

 cinguJata^ as Perrier pointed out ; but none of these species 

 arc really identical with Schmarda's. It is, in fact, not a true 

 Perichata at all. 



I shall refer to it here as 



(4) Megascolex cingulatus, Schm. 

 (PL VII. figs. 9-13.) 



Perichrcta cinyiilata, Schmarda, Xeuc wirbell. Thiere, Bd. i. Ildlfte ii. 



p. 14, 

 Non Penchccta cmynlnta, Vaillant, Ann. Sei. Nat. 1868, p. 225. 

 Non Megascolex cingulatus, Vaillant, Annel^s, p. 72, 



T refer this worm to the genus Megascolex principally on 

 account of the fact that the setaj are not arranged in a perfectly 

 continuous circle round each segment, but are interrupted by 

 dorsal and ventral gaps, as, for instance, in Megascolex 

 cicruleus. 



The clitcllum consists of five segments, viz. xiii.-xvii. ; 

 seta3 are present upon all these segments, but vary in their 

 luimbers on different segments. The first segment of the 

 clitellum, the thirteenth, has a complete circle of setaj marked 

 of course by the same dorsal and ventral gaps as are the rows 

 of setffi upon the pre- and post-clitcllar segments. The four- 

 teenth, fifteenth, and sixteenth segments have each three setoj 



* "On Megascolex ccrrnleus, Teuipleton, from Ceylon," kc, Quart. 

 Journ. Micr. Sci. vol. xxxii. ])1. vi. 



t " Note sur rAnatoniie de deux especes du genre Periclueta" Sic. 

 Ann. Sci. Nat. t. x. (18US) p. 225. 



