PLATE 49. 



Fig. 1. 601. 1. Caryochinus ornatus. (Pag. 216.) 



1 a. An inilividual of tliis siiccks, the medium size, showing a portion of the column below. 

 1 A. A larger inilividual, destitute of a column. 

 1 c. The base of the same or a similar specimen, showing the form and arrangement of the pelvic plates, and 



succeeding costal plates. 

 1 rf. A specimen of a large size, having a portion of the column still attached. 

 1 c. A small specimen, slightly more elongated than usual, where the pores are less strongly developed than 



in many other specimens, and the markiugs of the surface very minutely granulate in regular con- 

 centric lines, without tubercles or ridges of any kind. 

 1 /. A specimen of about the same size, having a character precisely the reverse of the preceding. 

 1 5. A young specimen with a pari of the column attached. 

 1 A. A small specimen with several of the arms still remaining attached. 

 1 i. A fragment of slate enclosing the arms of a large individual. 



1 k. A portion of a single arm or finger, natural size, showing it to be composed of a double series of joints. 

 1 /. Enlargement of a single plate of the tentacula. 

 1 ;n. A fragment showing the inner margin with the tentacula attached. 

 1 n. A large separate plate, showing the arrangement of rows of pores, and surface marking of the ordinary 



character. 

 1 71 1- A portion of a pelvic plate highly magnified, .showing the vesicular tubercles in place of the poreg. 

 1 0. A plate where the radiating ridges are developed between and by the side of the rows of pores, with 



scattered tubercles over the remainder of the surface. 

 1 t • A portion of a scapular plate highly magnified, showing the pores with two, three, and more apertures, 



opening like little vesicles upon the surface of a tubercle. 

 1 *. The interior of a scapular plate, showing that the apertures of the pores arc simple. 

 1 p. A similar plate where the ridges and tubercles are more strongly developed 

 1 ^ t ■ Parts of other scapular plates, showing the vesicular tubercles, and the same where they have increased 



in size and coalesced. 

 1 r. An enlargement of several of the little pustular elevations, terminated above by the opening of the pore. 

 1 s. The inside of one of the hexagonal plates, showing the openings of the pores on the inner side, and the 



grooves extending from them to the margins of the plates. 

 1 t. An enlargement of the preceding figure, showing more distinctly the character of these little grooves. 

 \ t\. The inner side of one of the heptagonal plates, showing the arrangement and divergence of the grooves 



from the pores. 

 1 u. T!ie interior of a specimen, preserving thin sharp ridges, marking the direction of the grooves to the 



margin of the plates. 

 1 I). A view of the summit of a specimen, where the plates are well picserved. 

 1 X. Tho structure of the summit or crown of another specimen, showing the arrangement of the plates, 



arms and mouth, in reference to each other, and to the scapular plates. 

 1 y. This figure represents the structure of this species from the base to the summit of the scapular plates. 

 1 z. An enlargement of a portion of the column of fig. 1 d, showing the crenulatcd edges of the joints. 



