O'N ZOEA, «?rc. 5 



behind, and the fifth or termhial joint formed as in all the 

 genuine Zoeas, of a deep fork, the inner sides of which 

 are furnished with three small spines, the feet he erro- 

 neously counted as eight, none of them provided with 

 more than four terminal plumose setae, the antennae entirely 

 escaped observation, nor does it appear whether there are 

 any lateral spines to the corselet. Upon the whole, we 

 ought to feel grateful to Slabber for the first and most 

 characteristic figure that has been given of these curious 

 animals, and the pains he took to throw light upon their 

 history. 



Bosc, one of the most judicious naturalists of the French 

 school, in a voyage which he undertook to America with 

 a view to Natural History, discovered a single individual 

 of the species figured Plate I. fig. 3 in the Atlantic Ocean, 

 5 or 600 leagues from the coast of Fi'ance ; and justly 

 conceiving it distinct from all the other Genera of the 

 Crustacea, first instituted that of Zoea for the reception 

 of these anomalous animals, distinguishing the above 

 species by the title of pelagica ; it appears to have been 

 one of the smallest size, transparent as glass, and differs 

 from the former, principally, by the addition of a long 

 deflected lateral spine on each side of the corselet j the 

 antennae did not entirely escape the observation of this 

 able and zealous Naturalist, but he also failed in detecting 

 the peculiar structure of its other members. 



Mr. Cranch, in the course of Captain Tuckey's Voyage 

 to the Congo, discovered the curious and singular species 

 Plate I. fig. 5. in N. Lat. 1° 56", W. Long. 8° 46,37" which 

 Dr. Leach has named Z. Clavata, from the club-like shape 

 of its dorsal and lateral spines. 



Of the two species observed by the author in 1816, that 

 taken September 17, N. Lat. 16o W. Long. 26° 37" and 

 figured Plate. I. fig. 2. resembles most the Zoea taurus of 

 Slabber, its frontal and dorsal spine shorter in proportion; 

 the lateral spines sufficiently conspicuous 3 the three anti- 



