iv\K.\>n KB _'. 



glass, on November li'ith. I next day found many embryos, each in its 

 nmnion or involucrum. quiescent. Intermingled with these were nume- 

 rous white specks, in active motion, which, under the microscope, proved 

 yuun.ir < "////'. very minute, provided with six limbs, nor sin-wing any 

 resemblance whatever to the parent. 



Nothing coiiltl he more transparent than the amnion involving the 

 embryos, some of which soon hur-t their prison. Fig. 6, enlarged : young, 

 tL r . 7, magnified. 



Now, the illusion representing the cylindrical appendages as in- 

 dented, was dispelled ; for the supposed circles, forming so many annula- 

 tions, had originated from the embryos, in their integuments, being piled 

 like so many pieces in a rouleau of coinage, horizontally above each other. 



Among a numln-r of the adult Cafiiji examined on November 30th, 

 many specimens wanted the ovarian cylinders, while the discharge of 

 embrvos in their internments continued from those that had them. 



At lea>t twenty specimens were found among Catigi collected on 

 the ~>th ; all wanting the tubes. 



At this time they were inl'i-ted by the t'il<>n<-Ua. 



From the form of the Cnligm, displayed on bursting its integument, 

 oinpared with that of the adult, the animal undergoes an evident meta- 

 morphosis in its course to maturity. 



The surface of the shell is frequently speckled red, and many be- 

 come ruddy or purple, as the animal dies. Some of the young, on escap- 

 inir from the amnion, seem to be speckled. 



Several facts regarding these minute animals are unintelligible, and 

 others \ery indistinctly understood. Indeed, I am at a loss to compre- 

 hend the real nature of almost the whole external objects affixed to the 

 figures represented in the plate. 



A minute zoophyte, fig. 10, had found a nidus among them. 



2. CAUCUS SALMOXB. Plate LXVII. fig. 1. 



As the preceding parasite infests the Cod, so does the present subject 

 infest the Salmon. To free itself of this obnoxious enemy, the Salmon is 

 said to quit the sea and ascend rivers ; but whether truly so, I cannot cer- 



2i 



