MYEI0P0DA OF THE HEBGUI AECHIPELAGO. 



297 



distal extremity, which is very much curled, terminates in three 

 irregular processes, the central of which bears a series of fine 

 bristles. 



Two specimens, one male and one female, from Mergui. 



This species was identified by Dr. Karsch as a variety of 

 Sp. opinatus, but the form of the copulatory foot, an organ 

 which that naturalist had no opportunity of examining, serves at 

 once to distinguish it. From the form of this organ it appears 

 to be allied to S. lankaensis (Humbert), but in other particulars 

 it is undoubtedly different. 



Spieosteepttjs eeg-is, sp. nov. (Plate XXV. figs. 3, 3 a.) 

 Length 55 mm. Number of somites 61. 



Hind half of each somite deep brown, with paler margin ; 

 front half testaceous ; anal somite testaceous ; margins of valves 

 and apex of spine brown ; first dorsal plate testaceous in the 

 centre, brown in front and behind, with anterior and posterior 

 margins pale yellow. Antennae, legs, and front of head testa- 

 ceous. Body smooth and shining. 



Each somite divided by a sulcus into an anterior and posterior 

 portion. Posterior portion below marked with the usual longi- 

 tudinal striae ; above very faintly grooved in the same direction. 

 Grooves less strongly marked in the anterior than in the 

 posterior somites. 



First dorsal plate not extending laterally below the succeeding 

 one ; lateral portion striated and much attenuated ; antero- 

 inferior margin very round and marked off by a groove. 



Forehead with median sulcus. 



Posterior somite produced into a very short, very slightly 

 upcurled spiue, which projects slightly beyond the margins of 

 the anal valves. 



Anal valves with margins thickened and slightly compressed ; 

 posterior border very convex ; sub-anal plate triangular, marked 

 off from posterior somite by a sulcus. 



A single female specimen from King Island. 



G-enus Spieoboltts, Brandt, Bull. Ifosc. 1833, p. 202. 



Spieoboltjs caudulanus, Karsch, Zeits. Naturwiss. liv. p. 60. 

 (Plate XXV. figs. 4-4 b.) 



Length 75 mm. Number of somites 52. 



Each somite pale olive-green, with darker posterior portions ; 

 centre of the dorsal portion blood -red ; posterior somite and 



