744 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



Fig. 2. Pannychia pallida. Large wheels from general perisome, viewed from con- 

 cave side. 2a. Another from convex side. 2f). Small wheels of general 

 perisome and pedicels. 2c. Edgewise view of large wheel. 2d. Modified 

 wheel-like plate at end of papillse. 2e. Wheel-like plate from oral disk. 

 2/. Rod from end of tentacle, X 175. 2g. Calcareous ring, radial piece per- 

 forated, X 4. 2h. Rods from oral disk. 



Plate LXXIX. 



Fig. 1. Psolus rnacrolepis. Dorsal surface, X 2. la. Same, ventral, X 2. 16-lc. Plates 

 from ventral perisome, X 200. Id. Calcareous ring, three pieces, radial in 

 center, X 6. le. Rod from tentacle, X 200. If. Perforated plate from 

 perisome between base of tentacles and oral valves. 



2. Thyonidlum hawaiiense. Three radial (r) and two interradial {ir) pieces of 



calcareous ring, X 4f . 2a. Disk of table from general perisome. 26. Side 

 view of same. 2c. Spire of table with four prongs. 2d. Disk of table from 

 perisome at base of tentacles. 2e. Rod from oral plate, X 200. 



3. TJiyonidium alexandri. Calcareous ring, two radial and three interradial 



pieces, X 4f. 



Plate LXXX. 



Fig. 1. Opheodesoma spectabilis. Cartilaginous ring, Pol ian vesicles, etc., viewed from 

 side. cr. , cartilaginous ring, ctj., ciliated urns. ,'/., gonad. </f?., gonoduct. 

 i., intestine, m., madreporic canals, me., dorsal mesentery, pv., Polian 

 vesicles (very numerous), X 2|. la. Calcareous ring (radial pieces, r, with 

 perforations), X 3J. Ih. Anchor, slightly less than X 200. Ic. Miliary 

 rosettes, upper, X 330; lower, less than X 200, or same magnification as 

 anchor. Id. Rods from oral disk, X less than 200. 



2. Synaptula kefersteinii. Miliary grains, X 666. 



3. Thyonidium alexandri. Characteristic table, side view. 3a. One of the reg- 



ular tables viewed from above. Sh. A larger table with more irregular 

 disk, seen from above. 3c, 3d. Tables from pedicels. 3e. Plate from peri- 

 some at base of tentacles, X 200. 



Plate LXXXI. 



Fig. 1. Protankyra alha.tr o.'i.'<t. An anchor and miliary grains, la. Anchor plate, 

 X 200. 



2. Opheodesoma spectabilis. Anchor plate, X somewhat less than 200. 



3. Euapta godeffroyi. Anchor. 3a. Miliary rosettes. 3h. Rod from tentacle. 



3e. Anchor plate, X less than 200. 



4. Chiridota unisericdis. A tentacle, X 13. 



5. Chiridota Jtawaiiensis. A tentacle, X 13. 



Plate LXXXII. 



Fig. 1. Anapta inermis. Calcareous ring, ring canal, etc. ; «Z., alimentary canal; gon., 

 gonad.; m., madreporic canal; pr., Polian vesicle; r., radial pieces of cal- 

 careous ring, X 2. 



2. Tseniogyrus sp. One of the sigmoid deposits, X 200. 



3. Chiridota hawaiiensis. A wheel. 3a. Grains from subcutaneous layer along 



radii, X 200. 3b. Rods from tentacles, X 400. 3c. Same. 3d. Calcare- 

 ous ring, X 13. 3e. Rods from general perisome, X 200. 2e\ Same, X 400. 

 (Fig. to right. ) 



4. Protankyra albatrossi. End of anchor plate, showing incipient handle, X 200. 



4a. Calcareous ring, X 6f . 46. Deposits from tentacles. 4c. From oral 

 disk, X 200. 



5. Chiridota uniseriali^. Wheel. 5a. Rods from general perisome, X 400. 56. 



From subcutaneous layer, along radii, X 200. 5c. Calcareous ring, X 13. 



