POLYCH.ETA OF PLYMOUTH. 595 



EXPLANATION OF INITIALS. 



The authorities for various records are indicated by their initials, a list of which 

 is given below. Initials have reference only to the paragrcq^h in which they stand. 

 Where no initials are given at the end of any paragraph the records are by 

 E. J. Allen :— 



A.j.s. — A. J. Smith, Assistant at the Laboratory since 1895. 



c.s. — Creswell Shearer. 



E.J.A. — E. J. Allen. 



E.J.B.— E. J. Bles. 



F.W.G.— F. W. Gamble. 



J.T.c. — J. T. Cunningham. 



R.A.T.— R. A. Todd. 



s.p. — S. Pace. 



T.V.H.— T. V. Hodgson. 



W.B.B.— W. B. Benham. 



w.G. — Walter Garstang. 



ARCHIANNELIDA. 



TuRBANELLA HYALiNA Max Schiiltze : Miiller's Archiv., 1853, p. 241. 



Plymouth. Found by Dr. C. Shearer on the glass of one of the 

 Laboratory tanks, July 26th, 1909. Dr. Shearer states : — " This 

 form is apparently most rare, having never been described since 

 1853. Apparently an Archiannelid with parapodia of a primitive 

 kind. Usually placed in the Gastrotrichia." 



DiNOPHiLUS T^NiATUS Hamier : Journ. Mar. Biol. Assoc. N.S. vol. 1, 

 p. 119. 



Plymouth. In rock-pools in the Sound far above low water, in 

 March and April, not found in June (Harmer, loc. cit.). Found often 

 in immense numbers in pools high up on the limestone rocks below 

 the Laboratory and in front of West Hoe Terrace. Records of the 

 occurrence of the species below the Laboratory were kept by Mr. 

 A. J. Smith between 1906 and 1910. From these it appears that it 

 was abundant from November to April, but absent or very scarce 

 between May and October, 



Dinophilus GYROCiLLiTUS Schmidt : SJiearer, Quart. Journ. Micr. Sci. 

 vol. 57, 1912, p. 337. 



Plymouth. From sandy dredgings from Cawsand Bay. Can 

 also be obtained in scrapings from the piles in Millbay Docks. 

 Lived well in small aquaria and became established in the Labor- 

 atory tanks (Shearer, loc. cit., p. 342). 



Breeds all the year round in the Laboratory Tanks (c.s.). 



Protodrilus flavocapitatus Uljanin : Pierantoni, Protodrilus. Fauna 

 Flora Golf. Neapel. Mon. 31, 1908, p. 167. 

 Plymouth. The first record of Protodrilus at Plymouth is by 



