igoS.] W. M1CHAËI.SEN: Oligochceta of the Indian Empire and Ceylon. 139 



functionally with the diverticula of the spermathecae of other families. But this assump- 

 tion need not be urged to the conclusion that the muscular and glandular adjacent organs 

 are homologous with the diverticula of the Megascolecid spermathecae, which have quite 

 another function. These adjacent organs certainly have been acquired independ- 

 ently in the Moniligastridœ and in the Megascolecidce (as well as in other families such 

 as the Enchytrceidce). For in the Moniligastridœ (as well as in the Enchytrœidœ) these 

 structures are missing in the more archaic genera, for example in Desmogaster , which 

 in the line of descent forms a connecting link between those Moniligastrid and Mega- 

 scolecid genera with complex spermathecae. As we can scarcely assume a homology 

 between these organs acquired independently in the two families, and as, furthermore, 

 their function is different, we would do better not to use the same nomenclature for 

 both. I therefore propose to restrict the term "diverticula" to the appendices of 

 the spermathecal main pouch in the MegascolecidcB (and the Enchytrceidce) . I shall use in 

 the Moniligastridœ the following terminology : I understand by the term "Main pouch" 

 {—Haupttasche) the simple spermatheca of Desmogaster and others, as well as its 

 homologue in Moniligaster and Drawida (part.), consisting of a thin-walled, more or 

 less regular, pear-shaped "ampulla" {= Ampulle) and a long, thin, bent or coiled 

 "duct" {= Aus führ gang). The muscular widening of the distal end of this duct, 

 as it is found in some species of Drawida, namely the muscular pouch into which 

 this ductopens, I call "muscular atrial chamber" ( =muskulöser Atrialraum) 

 and -its sack-like growths the " atrial sacs " {=atrial Säcke). The glandular 

 appendices to the atrial sacs in the genus Moniligaster may be called "spermathecal 

 glands" {=samentaschen-Drüsen) . 



, GEN. KUPOLYGASTER. 



EUPOI^YG ASTER BROWNI, MICHI.SN. 

 E. b., MICHAELSEN, in Mt. Mus. Hamburg, xxiv, p. 143. 



Present one specimen. 



External Characters. — Dimensions: Length 150 mm., thickness 4 — 6 mm., 

 number of segments 293. * 



Colour brownish. 



Head prolobous. Prostomium broad. First segment apparently divided into 

 two annul i by a furrow which exactly resembles an intersegmental furrow. As the 

 setae of the anterior segment are inconspicuous or obliterated, this annulation is only 

 recognised by the situation of the sexual pores, being judged to equal that of other 

 species of Eupolygaster. If this apparent annulation should prove to be a true segmen- 

 tation, all the notes about the number of segments would have to be augmented by one, 

 and then this species would differ from the other species of its genus. 



Setae very small, especially at the anterior part of the body, inconspicuous or 

 missing in the first eight segments, strictl)' paired, all on the ventral side of the body, 

 the median dorsal distance equalling about f of the circumference of the body {dd = 



