No. 3.] ORGANS IN PHASCOLOSOMA GOULDIL 



395 



LITERATURE CITED. 



'90 Andrews, E. A. Notes on the Anatomy of Sipunculus Gouldii Pour- 

 tales. Stud. Biol. Lab. Johns Hopkins Univ. Vol. iv, pp. 384-430, 

 Pis. XLIV-XLVII. 



'96 Bethe, a. Eine neue Methode der Methylenblaufixation. Anat. 

 Atizeiger. Bd. xii, No. 18, pp. 438-446. 



'91 JouRDAN, E. Les corpuscles sensitifs et les glandes cutanees des 

 Gephyriens inermes. An7i. Sci. Nat. 7^ sdrie. Tome xii, pp. 1-13, 

 PI. I. 



'95 Rath, O. vom. Zur Conservirungstechnik. Anat. Anzeiger. Bd. xi, 

 No. 9, pp. 280-288. 



'91 Ward, H. B. On Some Points in the Anatomy and Histology of 

 Sipunculus nudus L. Bull. Mus. Co7np. Zool., Harvard College. 

 Pp. 143-182, Pis. I-III. 



EXPLANATION OF PLATES. 



The figures in Plate XXXIV are from methylene-blue preparations. The fig- 

 ures in Plate XXXV, with the exceptions of 18 and 21, are from preparations 

 made by the Vom Rath method. Most of the drawings were made with Leitz 

 objective 7, ocular 2, the finer details being filled in with the aid of Zeiss Apo- 

 chromatic 2 mm. immersion lens and compensating ocular 6. All figures were 

 drawn with the aid of the Abbe camera lucida. 



ABBREVIATIONS. 



