1850.] 23 



mens described by Mr. Say and Dr. Randall, which retained the original labels. 

 The catalogue given below, with the notes on the principal species, were made 

 during the examination of the collection, and I had intended to communicate them 

 to the Academy soon after my return home, but several circumstances, which it 

 is hardly necessary to mention, prevented my doing so as early as I intended, 

 and I offer them now, as I believe no communication has yet been made to the 

 Academy of the extent of their collection. The catalogue includes the Podoph- 

 thalmian Crustacea only, as there were but few specimens belonging to the other 

 subdivisions, and those not all in good condition. 



In a few cases I have had to correct the determinations of Dr. Randall. The 

 necessity for these corrections I communicated to Dr. R. after my return home, 

 and begged that he would himself correct his own errors ; but his distance from 

 the specimens, and his present engagements, have induced him to entrust that 

 office to me. I have therefore made the requisite corrections, influenced by that 

 friendly consideration for Dr. R. which a consciousness of one's own liability to 

 error should ever induce for the errors of others. 



The nomenclature adopted is in general that of Milne Edwards. 



CATALOGUE. 



PODOPHTHALMIA. DECAPODA. 



A. Brachyura. 

 1. Family OXYRHINCA. 



1. Leptopodia, Leach. VI. Mithrax, Leach. 



1. L. sagittaria. Leach. 9. M. spinosissimus, M. Edw. 



2. L. calcarata. Say. 10. M. hispidus, M. Edw. 

 IL LiBiNiA, Leach. 11. M. sculptus, M. Edw. 



3. L. canaliculata. Say. VII. Pericera, Latr. 



4. L. dubia, M. Edw. 12. P. cornuta, M. Edw. 



5. L. affinis, Randall. VIII. Epialtus, M. Edw. 



III. LissA, Leach. 13. E. Nuttalli, Randall. 



6. L. fissirostra. Say. 14. E. productus, Randall. 



IV. Herbstia, M. Edw. IX. Lambeus, Leach. 



7. H. parvifrons, Randall. 15. L. echinatus, M. Edw. 



V. Chorinus, Leach. X. Parthenope, Latr. 



8. C. heros, Leach. 16. P. horrida, Fabr. 



2. Family CYCLOMETOPA. 



XI. Cancer, M. Edw. XIV. Panopeus, M. Edw. 



17. C. limbatus, M. Edw. 20. P. Herbstii, M. Edw. 



XII. Carpilius, Leach. 21. P. limosus, M. Edw. 



18. C. corallinus, M. Edw. XV. Pseudocarcinus, M. Edw. 



XIII. Lagostoma, M. Edw. 22. P. mercenaria. 



19. L. nodosa, Randall. 



