[53] NOTES ON ENTOZOA OF MARINE FISHES. 771 



Nos. 1 and 2 had the red pigment spot in the neck ; Nos. 3 and 4 

 were without any red coloring matter in the neck; Nos. 1 and 3 were 

 somewhat flattened under the compressor ; Nos. 2 and 4 were not com- 

 pressed ; in No. 2 the neck immediately behind the bothria was slightly 

 swollen and measured .2 nim in diameter, while beyond the swollen point 

 its diameter was as given above ; in the same specimen the fifth segment 

 from the end was .88 mm in length ; in No. 4 there were twelve mature 

 segments. All the mature segments were thickest in the middle and 

 tapered towards both ends. 



The vessels of the water- vascular system are very distinct in the liv- 

 ing specimens ; they could be traced from the anterior part of the body, 

 where they lie near the margins, through each pedicel to the bothria. 

 Each pedicel contains two vessels, one of which communicates with one 

 of the marginal vessels of the neck and the other is continuous with 

 one of the vessels in the diagonally opposite pedicel; these vessels are 

 all sinuous. Strong bands of longitudinal muscles run from the neck 

 into the pedicels and to the bothria. As each, of the numerous loculi 

 acts as an independent cupping-disk, their combined action must enable 

 the parasite to adhere with considerable power to the mucous mem- 

 brane of its host. The cirrus, although retracted in every case, was seen 

 in sections of a segment to be covered with spines; the cirrus appears 

 to be slender and the spines are minute. 



In size of strobile, shape of segments, size of ova and echiuate cirrus, 

 B. flexile agrees with Van Beneden's E. minimum. There was not a sin- 

 gle individual in the lot of twenty-five specimens, however, whose both- 

 ria agree with E. minimum, 



11. Bhinebothrium cancellation sp. nov. 



[Ca?icellalus, latticed.] 

 [Plate v, Figs. 6-8.] 



Head with four lateral bothria, which are elliptical and mounted on 

 short pedicels; faces of bothria with about twenty-one loculi arranged 

 somewhat trilineally ; anterior margins of bothria free, slightly project- 

 ing, posterior margins appressed, neck broad and flat at base of bothria, 

 somewhat constricted behind head, and almost immediately crossed by 

 tine, closely-crowded, transverse lines ; distinct segments make their ap- 

 pearance l mm or less back of head ; the segments are much broader 

 than long throughout the length of the strobile until near the posterior 

 end, where they are as long or even longer than broad ; they are convex 

 on the margins, so that the marginal outline of the strobile is crenulate ; 

 the chain of posterior segments is rather moniliform ; the anterior and 

 median parts of the body are crossed at more or less regular intervals 

 by distinct transverse lines, which give rise to the deceptive appearance 

 of elongated transversely wrinkled bothria; body rather flat and thin; 



