770 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



PLATE 53. 



FIG. 1345. An unusually large specimen of Btylometra spinifera from off northern Cuba, 157 

 fathoms (Albatross Station 2336), with a species of Scalpellum attached to the 

 cirri. Natural size. 



1346. An unusually well-developed specimen of Ptilometra mulleri from Sydney. New 

 South Wales, with PoJytrcma tiiiniaceum growing on two of the right-hand cirri. 

 Natural size. 



PLATE 64. 



FIG. 1347. A specimen of Calyptometra lateralis from off Niihau, Hawaiian Islands, 378-426 

 fathoms (Albatross Station 4179), showing, on the right profile, a large myzostome 

 cyst. Natural size. 



1348. A twelve-armed specimen of Heliometra maxima from off southeastern Sakhalin, 64 

 fathoms (Albatross Station 5017). 



PLATE 55. 



FIG. 1349. Notocrinus ririlis, proximal portion of arm of a fully grown female, showing the 

 genital papilla? in the angles between the pinnules and the ambiilacrni furrow. 

 (After Mortensen.) 



1350. Notocrinus ririlis, proximal portion of arm of a male showing the swelling produced 

 by the testes and the small genital pores in the angles between the pinnules and 

 the ambulacral furrow; the lowest pinnules are ungrooved. (After Mortensen. ) 



1353. Notocrinus virilis, proximal portion of arm of a female with the ventral surface re- 

 moved and the marsupia opened so as to show the embryos within them : proximal 

 to each marsupium is an ovary. (After Mortensen.) 



1352. Notocrinus virilis, proximal portion of arm of a male with the ventral surface par- 

 tially removed to show the size and shape of the testes. (After Mortensen.) 



PLATE 56. 



Fio. 1353. Pentacrinoid larva of Hathrometra prolixa. (After Mortensen.) 

 1354. Pentacrinoid larva of Heliometra glacialis. (After Mortensen.) 

 1355. Pentacrinoid larva of Antedon petaxux. (After Mortensen.) 



PLATE 57. 



FIG. 1356. Sabinella ptilovrinicola attached to calyx of Ptilocrinus pinnattts. (After Bartscb.) 



X li. 

 1357. Sabinella ptilocrinicola attached to calyx of a large specimen of Ptilocriinix pinnatux, 



showing the distortion of the latter. (After Bartsch.) X li. 

 l.'tnx. Xnbiiwlla iititocrtnicola attached to calyx of J'tilncrinitx pinnatux. (After Bartseh.) 



X li. 



1359. Sabinella ptUocrinicola. (After Bartsch.) X about 6. 

 1360. Type specimen of Sabinella ptilocrinimla. (After BartsvlO X about 6. 

 1361. Sabinella ptilocrinicola. (After Bartsch.) X about 6. 

 1362. Stilifi'i- (Altirrouttlia) bathymctrir, attached to arm base of liatlijitnetra, sp. (After 



Hnrtlaub.) X 4i. 

 13H3. Portion of disk of specimen of rainnntJiiiia xrhleiii'lH with cysls of Mii:xtniiiniii 



platypus. (After P. H. Carpenter.) X 2. 

 1364. Disk of specimen of Comatula rotalnria with an Isopod visible throujih the anal 



openlnp. (After ]-. H. Canx>nter.) X 2. 



