ADDITIONAL L.M.B.C. TURBELLARIA. 177 



fra den naturh. Foren. i Kjobenhavn, 1879, pp. 1— 

 42, Tab. III.) 



11. Schmidt, Ferdinand. Graffilla braunii, n. sp. Ar- 



chiv. fur Naturgesch., 1886. Bd. I. 



12. Verrill. Trans. Connecticut Acad., vol. viii., p, 



467, 1892. 



Explanation of Plates. 

 Plate V. 



Fig. 1. Penis of Mesostoma neapolitanum, v. Graff. 

 v.s., seminal vesicle ; ch., chitinous tube which 

 projects into the spacious atrium. 



Fig. 2. Anterior end of variety of Monotus lineatus (0. 

 F. M.), with greatly reduced eye spot, e., 

 eye ; ot., otolith ; g., gut ; t.c, tactile cilia on 

 anterior margin. 



Fig. 3. Graffilla buccincola, n. sp., from a pressure of 

 preparation, the male organs are developed in 

 this individual, ep., epidermis; ph., pharynx; 

 e., eye ; s.gl., salivary (?) glands ; g., gut ; te., 

 testis; v.s., seminal vesicle; pe., penis. 



Fig. 4. Anterior end of an individual in which the 

 female elements are developed, ger., germ 

 gland; y., yolk gland, which is not figured on 

 the right side of the sketch; at., atrium; r.s., 

 receptaculum seminis ; other letters as in fig. 

 3. 



Fig. 5. Pigment spots, composed of groups of granules, 

 from the subcutaneous parenchyma of G. 

 buccinicola. 



Fig. 6. Four sketches, to illustrate the variations in form, 

 of G. buccinicola, a. and b., examples in the 



