PLYMOUTH .MARINE INVEKTEBRATE FAUNA. 233 



[ Myzostomaria : Oligochaeta : Gephyrea: Hirudinea: Chaetognatha : Brancliiopoda ] 



MYZOSTOMARIA. 



Myzostomum cireifekum, Leuckart: BeuJtam, Cambridge Nat. Hist., 

 Worms, etc., fig. 186. 



Common on Anfcdon bifida from the Sound (e.j.a.). 



OLIGOCH^TA. 



Clitellio arenarius, Claparede : Beddard, Joiirn. Mar. Biol. Assoc., 

 N.S., i, p. 69. 



Mud at Drake's I. and on the shores of the Sound (f.e.b.). 



Clitellio ater, Claparede: Beddard, Journ. Mar. Biol. Assoc, N.S., i, \). VO. 

 Mud on Drake's I. and on shores of Sound (f.e.b.). 



Pachydeilus sp. : Beddard, Journ. Mar. Biol. Assoc, N.S., i, p. 69. 

 Common in gravel between tide-marks. Bum B. (f.e.b.). 



GEPHYREA. 



Nomenclature : — Selenka. E., Die Sipunculiden., Eeiseu. Archipel. Pliilipp. 



Semper., Bd. iv, 1883-1885. 

 Petalostoma minutum, Keferstein. 



Bum B., common in crevices of shale (t.v.h., r.a.t., e.j.a.). 

 Phascoliox stkombi, Montagu. 



Frequently met with in shells of Aporrhais pes-pelecani ; Mew- 

 stone Gds. (T.V.H., e.j.a.). 



Thalassema neptuni, Gaertner. 



Common in holes in rock, Bum B., Wembury B., Drake's I. ; one 

 spec Yealui Sand-bauk ; in stones dredged from Millbay Cli., Asia 

 Sh., and (rarely) Queen's Gd. (r.a.t.). 



Phoeonis hippocrepia, Wright: Shijylei/, Cambridge Nat. Hist., 1896. 



Abundant in the Sound (w.g.) : Duke Bk. (T.v.H.) : Millbay Ch. 

 (t.v.h., E.J.A.) : AsiaSh.; Queen's Gd. (s.P.). 



HIRUDINEA. 



Pontobdella muricata, Linnieus : IV. C. Mcintosh, Mar. Invert. & 

 Fishes St. Andrews, p. 114, fig. 



Occasionally on the outside grounds; parasitic on the skate (s.P.). 

 Breeding: July (e.W.l.IL). 



CH^TOGNATHA. 



Sagitta BIPUNCTATA (Quoy & Gaimard): Grassi, I Chetognati, Fauna 

 u. Flora Golf. Neapel., v. 



Jn townettings throughout the year (l.h.g.). 



BRANCHIOPODA. 



EvADNE NOEDMANNI, Loven : C. Apdeiii, Nordisches Plankt., pt. vii, 

 Cladoc, p. 12, fig. 



1892, appeared beginning of July and still present in Oct. (E.J.B.): 

 1895, constantly present in Aui,'., disappeared early Oct. (t.v.h.): 

 Apr.-May, 1899 (p.t.c): May, July, Sept., 1903; Mar.- June, 1904 

 (l.h.g.). 



Carrying ova: Aug. (t.v.h.). Winter eggs produced from a))Out 

 mid-Sepl. (e.,lb.). 



