500 Progress of American Carcinology in 1879. [July, 
of this journal, while in his paper on Decapoda,' he describes as 
new, eight species, Microphrys error and Callinectes dubia from the 
west coast of America, and Mithraculus hirsutipes, Mithrax tri- 
spinosus, Lambrus granulatus, Panopeus packardii, Pilumnus dasy- 
podus and P. melanacanthus from Florida. Notes are given on 
Anaptychus cornutus, Mithraculus areolatus, Mithrax triangulatus, 
Panopeus affinis, P. purpureus, Xantho 9-dentatus, Chlorodius 
fisheri, Pachygrapsus transversus, P. gracilis and Calappa convexa. 
n anatomy almost no work has been done. Dr. Packard in 
his Zoölogy, gives a résumé of the structure of the Crustacea, 
but the additions to our knowledge of these animals is slight. A 
figure is given showing the differences between the eyes and brain 
of the blind craw-fish ( Cambarus pellucidus) and another species 
with well developed eyes. A brief account of the visceral anat- 
omy of Serolis is given, to which we must take exception, it 
being erroneous in several particulars. The writer contributed to 
the same work, figures of the nervous anatomy of /dotea irrorata 
and of Serolis, but they show no important differences from simi- 
lar figures of other species of Isopoda. 
It is in embryology that the valuable portion of American 
work on the crabs has been done, and here we have to record 
three papers on the development of these animals; two by Dr. 
Faxon and one by Dr. W. K. Brooks. Dr. Faxon in his first 
paper? gives figures showing the later egg-stages and the first 
stage after hatching of Hippa talpoida, so that with the previous 
paper of Prof. Smith on the same subject,’ we have a nearly com- 
plete life history of this species. In the first egg stage observed, 
the labrum, both pairs of antennz, the mandibles and the telson 
are outlined (the “ nauplius ” stage). Both pairs of maxille and 
the first two pairs of maxillipeds appear previous to hatching, and 
in the first zoea stage no other appendages are indicated, but 
those mentioned acquire a greater development. The abdomen 
consists of four joints without appendages and the telson resem- 
bles somewhat strongly that of a larval shrimp. The gills are 
yet lacking, and although able to see the other vessels distinctly, 
our author could not discover the hepatic artery. Dr. Faxon 
1Notes on North American Decapods. Proc. Boston Soc. Nat. Hist., XX, pP- 
145-160, 1879. ; 
2On some young stages in the development of Hippa, Porcellana and Pinnixa 
Bulletin of the Museum of Comp. Zodlogy, v, pp. 253-268, pls. I-v (June, 1879). 
3 Transactions of the Connecticut Academy, 111, pp. 311-342, pls. 45-48 (1877): 
