792 CONTRIBUTION TO AUSTRALASIAN OLIGOCHAETA, I., 



LITERATURE. 



Benham, 1904 — " On some new Species of the genus Phreodrilus." Quart. 

 Journ. Micro. Sci. xlviii., 271. 



Benham, 1907 — " On the Oligochaeta from the Blue Lake, Mount Kosci- 

 usko." Rec. Austr. Mus. vi. 



Beddard, 1891 — "Abstract of some Investigations into the Structure of the 

 Oligochaeta." Ann. Mag. Nat. Hist. 1891, p. 92. 



Beddard, 1891 — "Anatomical Description of Two New Genera of Aquatic 

 Oligochaeta." Trans. Roy. Soc. Edinb. xxxvi., p. 273. 



Beddard, 1895— A Monograph of the Order Oligochaeta : Oxford. 



Michaelsen, 1900 — Oligochaeta; Das Tierreich. 



EXPLANATION OF PLATES XXIX. -XXXI. 



at., atrium — hkl.vs., portion of network of bloodvessels in connection 

 with intestine— brn., brain — cil.fn., ciliated funnel of spermiduct — emus., 

 circular muscle-fibres — cu., cuticle— cl., clitellum — com.vs., commissural 

 bloodvessel — d.v., dorsal bloodvessel — dvpg.spz., developing spermatozoa — 

 ep., epidermis — ex.ep., external epithelium of penis — gm., granules — 

 int.ep., internal epithelium of penis-sac — int.ep., internal epithelium of 

 penis— int., intestine— l.mus., longitudinal muscle-fibres — lm., lumen — 

 muse, muscle-fibres — nph., nephridium — nuc, nucleus— nv.gn., nerve gang- 

 lion— n.c, mass of nerve-cells in connection with posterior surface of 

 brain — ov., ova — oe., oesophagus — ov.se, ovisac — ovd., oviduct— oes. con., 

 oesophageal connective — pn., penis — pn.se, penis-sac— ph., pharynx — prst., 

 prostomium — r.t.v., retiform mass of bloodvessels in association with the 

 intestine— spr., spermiduct — spz., spermatozoa — spth.de, spermathecal 

 duct — sph., spermatophore — sp.gld., spermiducal gland— sp., septum — 

 spth,, spermatheca — sp.se, sperm-sac— sp.fn., ciliated funnel of spermiduct 

 — vent.n.cd., ventral nerve-cord — v.v., ventral bloodvessel — v 2 , divisions 

 formed by bifurcation of dorsal bloodvessel anterior to brain. 



Plate xxix. 



Fig.l. — Astacopsidrilus notahilis, gen. et sp.nov. Two setae from a latero- 

 ventral bundle. 



Fig. 2. — Entire specimen of A. notahilis, as seen by transmitted light. 

 (Drawn from a specimen stained with borax-carmine, and mounted 

 in canada balsam). 



Fig. 3. — Transverse section of penis and penis-sac of A. notahilis. 



Fig.4. — Spermiduct and spermiducal gland, etc., A. notahilis, recon- 

 structed from serial sections. 



Fig. 5.— Transverse section of spermathecal duct of A. notahilis. 



Fig. 6. — Transverse section of spermathecal duct of A.fusiformis, gen. et 

 sp. nov. N.B. — Circular musculature much exaggerated. 



