NO. 1555. HA WA IT A X HOL O THURIA NS— FISHER. 743 



Fig. 2. Pseudostichopus propinquus. Calcareous ring, one of the dorsal radial and 

 interradiai pieces. 2a. Ventral radial and interradial ])ieees. 



Platk LXXIII. 



Fi<r. 1 . Orplmu.nja.'i limgnis. Dorsal view of large S}>ecimen. Two-thirds natural size. 

 2. Anaptd incrmix. Ventral view, showing general form. Two-thirds natural 



size, 

 o. PseudoMichoixi!^ proplnqnnx. A'entral view, X 1. 



Plate LXXIV. 



Fig. 1. IWiuJoslicJinj)!!.^ ])ropinqrm.i. Dissected from above to show alimentary canal, 

 anal aperture ((0> ring canal (c), cloacal cavity {d), gonad {g), longitudi- 

 nal muscle bands {Im), dorsal mesentery {m), madreporic canal (inc), 

 Polian vesicle {p), respiratory trees (r). X I.3. 

 2. Scotodelma vitreiun. Ventral view, showing the large semirigid papilhe and 

 two rows of pedicels on either ventrolateral radius, a, b, c, dorsal papilte. 

 X I3. 2a. Calcareous ring, the radial portion with perforation. X 6. 



Plate LXXV. 



Fig. 1. Scotodelma r'drcnm. Rods from large lateral or flank papillte. 1. From 

 middle portion, la. From distal portion. Ih. Irregular rod from l)asal 

 half. Ic, Id. Distal portion. Ic. From tip. le. Characteristic large rod 

 from l)asal portion. Note that \r is the other half of le. X 66. 



2. Same. Rods from dorsal i^erisome. 2a-c. Other rods from dorsal perisome. 



X 66. See also Plate XI, fig. la. 



3. Same. Rods from wall of gonad. 



4. Same. Rods from ventrolateral pedicels, the larger from near base, the 



smaller from tip. X 66. 



5. Lxtmogonehiserkdln. Rod from ventral perisome. 'mk Another rod. X 175. 



Plate LXXVI. 



Fig. 1. Scotodeiina rllreum. Characteristic rod from ventral perisome. la. Ih, Ic. 

 Rods from ventral perisome. Ic. Showing a slightly more comjilicated 

 form than 1. X 66. 



2. Same. Large rod from dorsal perisome. X 66. 



3. P»eti.dosti('h()pufi propnnquv.^. 8rt-8/;. Rods from wall of gonad. ;< 400. 



Plate I.XXVII. 



Fig.]. Orphtwrgus ijislgni.'^. 1, la-c. Various forms of rods from dorsal perisome. 

 X 66. 



2. Same. 2, 2ti-f'. Rods of ventral perisome, anterior two-thirds of body. 



X 66. 



3. Same. Large ellipsoid from ventral perisome in posterior third of body. 3(». 



Rod intermediate between ellipsoid and fig. 2, from posterior region, ven- 

 tral perisome. 3c. Smaller smooth ellipsoid from same region. 36, 36\ 

 3d, 3e. Rods from pedicels. (Fig. Ic is the commoner type in the papillai. ) 

 X 200. 



Plate LXXVIII. 



Fig. 1. La'tmogonc hiser talis. Wheel from dorsal perisome, viewed from convex side, 

 la. Edgewise view of same. Ih. Wheels from ventral perisome. That on 

 left from convex side, X 175. That on right from concave side, X 350. 

 Ic. Small wheel from dorsal papilla, X 175. Id. Rod from ventral peri- 

 some, X 175. le. Rod from pedicel, X 175. 



