PLATE XXXIV. 
Mesothyra Oceani. 
iSee Plates 32 and 33. 
Fig. 1. 
Fig. 2. 
Fig; 3. 
Fig. 4. 
Fig. 5. 
The carapace of a large individual, the left valve of which is quite iiupei-fect. The right valve 
shows the characteristic features of the genus and species. 
Portage group. Ithaca, Tompkins county. 
A light valve of the carapace, proportionally somewhat narrower than that in the preceding figure. 
Portage grouji. Ithaca, Tompkins county. 
A specimen retaining the posterior abdominal somite and the post-abdomen ; showing the time 
proportions and the characteristic ornamentation of these parts. 
The ventral aspect of a small post-abdomen, showing the triangular outline of the caudal plate, 
the characteristic suiTace ornamentation and the setaceous fimbi ise on the cercopods. 
Portage group. Ithaca, I'ompkins county. 
A small specimen retaining the abdomen and post-abdomen, enlarged to two diameters The 
parts of the abdomen are incorrectly represented as one piece, the articular surface of the 
two somites being at the broken line about one-third the length of the abdomen from the 
anterior margin. The cancellating striations on the posterior somite are partially due to lateral 
compression. 
Portag-e group. Ithaca, Tompkins county. 
