PLATE VII. 



Fig. 



1. Thenopa scyllariformis (p. 33). From ii specimen in the British Museum. From 



Heme Bay. 



2. Carapace of a larger individual of the same species. From Chalk Farm. In Mr. 



Bowerbank's collection. 



3. Fragment showing the rostrum, the anterior margin of the carapace on the right side, 



and the basal joint of the right external antenna. From the same locality, and 

 Mr. Wetherell's collection. 



4. The under side of the external antenna, from the same. 



5. Thorax and portions of the first four pairs of legs. From a Sheppey specimen in Mr. 



Bowerbank's collection. 



6. View of the abdomen and caudal plates. 



7. Tluee segments of the abdomen. 



8. Side view of the same. The last three specimens are from Highgate, and in 



Mr. Wetherell's collection. 



