PLATE XXVII. 



Trematopygus crucifer (Morton) (page 63). 



Fig. la. Upper surface of the test. 

 lb. LoAver surface of the test. 

 Ic. (Side view of the same. 

 Id. Posterior view of the same. 



le. Lower portion of the petaloidal region of the right poatero-lateral ambula- 

 crum. 

 If. Much enlarged view of several plates of the same. 

 Ig. Apical disk, enlarged. 

 Ih. Tubercle from above. 

 It. Lateral view of the same. 



Catopygus oviformis Conrad (page 64). 



Fig. 2a. Upper surface of the test. 

 2&. Lower surface of the test. 

 2c. Lateral view of the same. 

 2d. Posterior view of the same. 

 2e. Right postero-lateral ambulacrum, enlarged. 

 2/. Several plates of the same, highly magnified. 



Catopygus pusillus Clark (page 65). 



Fig. 3a. Upper .lurface of the test. 

 36. Lower surface of the test. 

 3c. Lateral view of the same. 

 3d. Posterior view of the same. 

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