84 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



up into a bunch of rootlike filaments by means of which the animal 

 is anchored in the mud. 



Test brownish white, tough and parchmentlike though thin; its 

 surface slightly wrinkled, mostly free from incrusting material 

 though some sand adheres, especially on a triangular area near 

 and anterior to the branchial aperture. Under the microscope 

 minute conical papillae can be seen scattered at wide intervals over 

 the body surface; they are generally better developed around the 



Figs. 33-37. — Coi.eolus herdmani Sluiter. 33. External view, x about .60. 34, 

 Left and right sides of body. X .75. 35, Large tentacle, x 9. 3G, Part of 



STOMACH AND HEPATIC TUBDLES. X 12. 37, PART OF A GONAD SEEN FROM THE SIDB 

 NEXT TO THE BRANCHIAL SAC. X 20. 



apertures, sometimes also on an oblique line, extending ventrally 

 and posteriorly from near the atrial aperture on each side, but this 

 line is not always conspicuous. No spicules w T ere found either in the 

 test or in the internal organs. Owing to wrinkling and distortion 

 incident to preservation the body diameters can only be roughly 

 estimated, but they are approximately as follows in the two largest 

 examples : _ . . . _. . , . 



r Greatest transverse Distance between 



Length of stalk. Length of body. diameter. apertures. 



224 ram. 36 mm. 20 mm. 15 mm. 



163 mm. 34 mm. 16 mm. 16 mm. 



