114 R. C. PUNNETT. 



(2) Specimen, 52 cm. X 6 mm., agreeing very closely with 

 last specimen. 



(3) Specimen, 36 cm. X 4 mm., with the three median 

 lines well marked, of equal thickness and unbroken. The 

 two outer ones are present only along the anterior half of the 

 body, and even here are finer than the others and much 

 broken. 



(4) Specimen, 15 cm. X 5 mm., with only three broad 

 inner lines except for the anterior 2 cm., where there are 

 two fine outer lines. 



(5) Specimen, 54 cm. x 7 mm., with three dorsal lines 

 only, except for an exceedingly fine trace of an outer one for 

 a distance of about J cm. on the right side only. 



From which it may be seen that these five form a series, at 

 one end of which there is a specimen with five well marked 

 lines of equal thickness throughout almost the whole length, 

 whilst at the other there is a specimen which shows only three 

 lines (excluding the faint trace mentioned above). In this 

 connection it is interesting to note that Burger (2) has 

 described a single specimen with seven dorsal lines on which 

 he founds a new species, E. septemlineata, but concerning 

 whose inner organisation he gives no details. With almost 

 equal justice the specimen last described above might be 

 christened E. trilineata. Since, in the light of the above 

 facts, it seems reasonable to look upon Burger's new species 

 as a variety, I would venture to suggest the name melano- 

 gramma for the species as a whole, restricting the terms 

 quinquelineata, septemlineata, etc., to denote varieties where 

 such a proceeding is thought desirable. 



With regard to the inner organisation of this form, I am 

 able to confirm the special features given by Biirger (2), and 

 also to add a few points of interest omitted by him. 



The epithelium is high, and its external portion contains 

 a number of anucleate (fig. 5) unicellular glands containing 

 minute yellowish bodies. Beneath the epithelium is a struc- 

 tureless basement membrane. Below this, again, is a layer of 

 longitudinal muscle fibrils, mixed up with which, in the 



