NO. 1846. ON CERTAIN ELEUTHEROZOIC PELMATOZOA—KIRK. 135 



Thiolliericrinus heberti de Loriol. 



Fig. 3. Lateral view of theca, showing great development of the proximal columnal 

 and relative insignificance of the cup; approximately Xl^. After de 

 Loriol, 1884-1889. (PI. 228, fig. 2a.) 



Thiolliericrinus flexuosus Goldfuss. 



4. View of theca and proximal columnal. In both this and the preceding figtire 



it is to be noted that in the cup nothing but the radials appear externally. 

 The appearance of irregularly placed cirri borne by the proximal columnal 

 is likewise of interest; approximately Xl^. After de Loriol, 1884-1889. 

 (PI. 229, fig. 26.) 



5. Cup from below showing character of proximal columnal, and its type of 



articulation; X2. After Bather, 1900. (Text fig. 117, 1, p. 195.) 



Antedon -phalangiuin (Miiller). 



6. Very early pentacrinoid stage, X 20. After Carpenter, 1888. (PI. 14, fig. 1.) 



Antedon tuberosa Carpenter. 



7. Later pentacrinoid stage than that shown in figure 6; X 12. After Carpenter, 



1888. (PI. 14, fig. 9.) 



Antedon multispina Carpenter. 



8. 9, 10. Successive stages in the development of the centro-dorsal as shown by 



this species; all X 12. After Carpenter, 1888. (PI. 14, figs. 5, 6, 7.) 



Antedon sarsii Duben and Koren. 



11, 12. Lateral view of some of the larval columnals of this species, and a view of 

 the articular surface of one of the columnals; much enlarged. After Bather, 

 1900. (Text fig. 49, 8, 9, p. 132.) After Sars. 



Plate 8. 



Antedon latidrra Carpenter. 



Fig. 1, 2. Two views of the centro-dorsal of this species showing ihe irregular arrange- 

 ment and relatively enormous size of the cirrus sockets; X 6. After Car- 

 penter, 1880a. (PL 23, figs. 6b, 6c.) 



Antedon (Solanocrinus) scrobiculata Goldfuss. 



3. Side view of a specimen showing highly elongate centro-dorsal. After Car- 



penter, 18806. (PL 10, fig. 14.) From Goldfuss. 



4. Inferior aspect of dorsal cup showing petaloid type of articulation. After de 



Loriol, 1884-1889. (PL 214, fig. 3c.) 



Pentacrinus {Extracrinus) dargniesi Terquem and Jourdy. 



5. Basal view of a specimen from which the stem has been lost. For comparison 



with figures 4 and 7; approximately X 3. After de Loriol, 1884-1889. 

 (PL 210, fig. la.) 



Antedon incerta Carpenter. 



6. A cirrus of this species to show the high degree of specialization acquired by 



these organs. Note the terminal claw and the spinous processes borne by 

 the ossicles to perfect the appendages as grasping organs. 



