CAMBARUS. 65 
« A. fluviatili minor. Thorax levis, punctatus, lateribus antice parum 
scabris. Rostrum breve. planum, apice acuminatum. Chel sex, anticis 
majoribus, brachiis serratis, carpis dentatis, manibus ovatis, levibus, punc- 
tatis, reliquiis quatuor filiformibus.” 
As Dr. Barton lived in Philadelphia, the specimen sent by him to 
Fabricius was probably the species now commonly known as C. Bartonii. 
Bose’s type probably came from South Carolina, as Desmarest asserts, 
and may have been some other species. His figure is too defective for 
identification. 
Rafinesque’s A. ciliaris, from Fishkill, Newburg, ete., N. Y., is without 
doubt this species, and his deseription of A. pusillus is probably based on 
small specimens of the same species. It runs thus: “ Antens length of the 
thorax, rostrum oval acute, a thorn and a longitudinal angle behind each 
eye; three pairs of pinciferous feet, hands of the first oblong dotted, wrist 
smooth. Obs. A very small species, living in the brooks near Saratoga, Lake 
George, Lake Champlain, Utica, Oswego, ete. Length one or two inches; 
vulgar name, brook prawn, shrimp, or lobster; entirely fulvous brown.” 
Say’s description was evidently drawn up from this species, although his 
supplemental remarks on page 443, where he says it is extremely common 
in the pine-barren marshes of the Southern States, particularly Georgia and 
Florida, probably relate to some other species. 
Milne Edwards, misled by the transposition of the numbers of Harlan’s 
figures, has described C. afinis under the name of A. Bartonii ; C. Bartonii 
(or a closely related species), under the name of A. affinis. 
The Museum of Comparative Zodlogy contains specimens of C. /atimanus 
from South Carolina, labelled A. Bartonii by Dr. Lewis R. Gibbes, and in the 
collections of the Academy of Natural Sciences of Philadelphia are speci- 
mens of ©. rusticus, var. placida, also labelled A. Barton by the same writer. 
The localities given by Gibbes for A. Bartomi, therefore, cannot be taken 
as belonging to this species. 
Erichson’s types of C. Bartoni’ in the Berlin Museum were examined by 
Dr. Hagen in 1870. They are a male, form II., and a young female, and 
according to Dr. Hagen both are C. /atimanus. They were collected by Caba- 
nis in upper South Carolina. Erichson’s type of C. Carolinus, also from South 
Carolina, appeared to Dr. Hagen to be C. Bartonii, but the description of 
Erichson agrees much better with the species formerly referred to C. Caro- 
linus by Hagen. 
