PLATE XXXII. 



PAGE 



Fig. 1. Anthracerps typus, M. and W 409 



1. View of an impression of the fossil left in a concretion; natural size. 



1 a. An enlargement of the same. 



Pig. 2. Bellinurus Dan^e, M. and W 395 



2. View of an internal cast of a nearly entire specimen, with the telson and 



some of the posterior margin restored. 



2 a. An outline profile view of the same, in which the projecting appendages 



of the posterior side of the cephalo-thorax, and of the sixth segment 

 of the thorax, are also restored in dotted lines. 



Fig. 3. PAL/EOCAMPA ANTHRAX, M. and W 410 



View of the fossil, natural size, as seen in a split concretion. 



Anthrapal^emon gracilis, M. and W 407 



View of an impression, and some remaining parts of the fossil, as seen 

 in a concretion, the caudal appendages being restored in outline. 



Enlarged outline, to show the serrations of the anterior lateral margins 

 of the carapace. 



An enlargement of the three joints of the peduncle, and a portion of 

 the flagellum, of one of the antennae. 



A portion of the flagellum, considerably enlarged, to show its minute 

 segments. 



Pal^eocaris typus, M. and W 405 



View of a nearly entire specimen, with the telson and stylets restored. 



Another specimen, consisting of the body and caudal appendages with- 

 out the legs and head. 

 One of the small natatory abdominal appendages from fig. 5, enlarged. 



Telson (incomplete at the extremity) enlarged so as to show the minute 

 marginal sitae. 



5 d. Enlarged outline of the telson, stylets, and two of the abdominal seg- 



ments — from 5 a. 



Fig 6. Acanthotelson Stimpsoni, M. and W 401 



6. A side view of a nearly entire specimen, as seen lying in the concretion. 

 It wants the antennae, some portions of the legs, and the natatory 

 abdominal appendages, and shows but one division of one of the 

 stylets, with the similarly formed telson above. 



6 a. Another specimen, showing the antennae. 



6 b. Outline restoration of the telson, stylets and two of the abdominal seg- 

 ments, as they must appear if the second or last joints of the stylets 

 are not double. (Enlarged about 2 diameters.) 



6 c. Another restoration of the same parts, as they must appear if the last 

 joints of the stylets are double, as we have reason to believe is the 

 case. 



6 d. One of the thoracic legs, enlarged in outline, as it appears to be, though 

 its extremity may not be complete. 



6 e. Enlarged outline of one of the anterior legs, showing the setae on two of 

 the joints. The last joint of this leg appears to terminate in a pointed 

 dactylus, but this may not be the case. 



6/. The telson, still farther enlarged, to show the two sets of marginal setae. 



Fig. 7. Acanthotelson in^equalis, M. and W 403 



View of specimen showing the head, antennae and body, with fragments 

 of the legs, but wanting the stylets and a poition of the telson. 



Fig. 8. Amphibamus grandiceps, Cope 135 



Representing a nearly entire skeleton, as seen in the half of a concretion; 

 enlarged 2 diameters. 



Fig. 



4. 



4. 





4 a. 





4 b. 





4 c. 



Fig. 



5. 



5. 





5 a. 





5 b. 





5 c. 



