LERN^OIDEA. I379 



The subdivisions of the last two families are indicated by Edwards 

 in his table, Crust., iii. p. 492, but not instituted into subfamilies. 

 Baird adopts them as family divisions. It is doubtful whether the 

 males of the Penellidae are not in some cases, at least, furnished with 

 appendages like the Chondracanthidse, although somewhat less per- 

 fect ; and in this case, the characteristic distinguishing the group, is 

 based upon the females. 



Lern^eopoda californiensis. 



Corpus latum, parce ohlongum, capite transverso. Brachia latitudine 

 corporis vix longiora. Sacculi ovigeri cylindrici, corpore dimidio lon- 

 giores. 



Body broad, but little longer than its breadth, head transverse. Arms 

 about as long as breadth of body. Ovigerous sacs cylindrical, half 

 longer than the body. 



Plate 96, fig. 1 a, b, different views. 



From the body of a salmon, taken in the Tlamath River, California. 



The head is nearly twice as broad as long, as seen in a vertical 

 view, and is triangular in outline. The rest of the body is at middle 

 nearly twice as broad as the head. The arms are rather short, and 

 are connected with the terminal disk by a slender process. The body 

 appeared to be full of eggs, as well as the external tubes. These 

 tubes contain the ova in several series, probably eight or ten. 



APPENDIX TO THE ENTOMOSTRACA. 



Figures 7 to 10, Plate 95, represent young individuals of species of 

 genera yet undetermined. 



