53] NOTES ON ENTOZOA OF MARINE FISHES. 771 



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

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

 omewhat flattened under the compressor; Nos. 2 and 4 were notcom- 

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

 \\ollenaiid measured .2 nnn in diameter, while beyond the swollen point 

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

 eafcroni the end was .SS mm in length ; in No. 4 there were twelve mature 

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

 apered towards both ends. 



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

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

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

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

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

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

 11 sinuous. Strong bauds of longitudinal muscles run from the neck 

 uto the pedicels and to the bothria. As each of the numerous loculi 

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

 be parasite to adhere with considerable power to the mucous niem- 

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

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

 obe slender and the spines are minute. 



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

 1. flexile agrees with Van Benedeu's E. minimum. There was not a sin- 

 le individual in the lot of twenty-five specimens, however, whose bo th- 

 ia agree with E. minimum. 



11. Rhinebothrium cancellatum sp. uov. 



[Canccllatus, latticed.] 

 [Plate v, Figs. G-8.] 



H 



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

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

 rOinewhat triliueally ; anterior margins of bothria free, slightly project- 

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

 iOmewhat constricted behind head, and almost immediately crossed by 

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

 )earance 1""" or less back of head ; the segments are much broader 

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

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



n the margins, so that the marginal outline of the strobile is creuulate ; 

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

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

 )y distinct transverse lines, which give rise to the deceptive appearance 

 )f elongated transversely wrinkled bothria j body rather flat and thin; 



