REPORT ON THE COPEPODA. 123 



Sub-genus : Pyromma (Saphirina). Paired eyes having yellow, red, or brown pig- 

 ment bodies, with corneal lenses placed in the middle or far back. The two last 

 joiuts of the posterior antennae together shorter than the elongated second joint. Inner 

 branches of the fourth pair of feet well developed, and as large as those of the other feet. 



Sub-genus : Cyajn t omma (Saphirinida) . Paired eyes having violet, blue, or bluish- 

 black pigment bodies, with corneal lenses placed quite on the front of the head. The 

 two last joints of the posterior antennae together as long as or longer than the very short 

 second joint. Inner branch of the fourth pair of feet rudimentary, its three joints 

 together scarcely longer than the first two joints of the outer branch. 



But these characters, though interesting, do not seem to me by any means of sufficient 

 importance to warrant their being taken as the basis of new sub-genera. They have, in 

 fact, not the slightest correlation, being associated or dissociated in the most variable 

 manner. For instance, while the two species here referred to Dana's Saphirina incequalis 

 and Saphirina ovalis, have the inner branch of the fourth foot short, the eyes frontal, and 

 the pigment bodies blue, Saphirina metallina, with frontal eyes and blue pigment bodies, 

 has the inner branches of all the feet as long or longer than the outer ; these three species, 

 therefore, cannot be assigned to either of the sub-genera proposed by Haeckel. It is 

 curious, too, that amongst the many specimens examined by Haeckel no females of any 

 species were seen. 



1. Saphirina ovalis, Dana (PL XLVII. figs. 1-12). 



Saphirina ovalis, Dana, Crust. U. S. Expl. Exped. (1852), p. 1246, pi. lxxxvii. fig 10. 

 „ detonsa (?) Id. Ibid. p. 1247, pi. lxxxvii. fig. 11. 



Length, l-10th of an inch (2"55 mm.) Anterior antennae (figs. 3, 4) five-jointed, the 

 second joint longer than the following three put together ; the whole limb is rather densely 

 setiferous on its upper margin, and in the male (fig. 3) the last three joints bear, instead 

 of setae, rather stout spine- like appendages. The posterior antennae (figs. 5, 6) have the 

 last two joints about equal in length to the second joint ; in the male they are stouter 

 than in the female, and the second joint is armed on its inner margin with a spine. The 

 swimming feet are short and broad, and those of the fourth pair (fig. 10) have the inner 

 branch very small, not exceeding in length the first two joints of the outer branch. The 

 fifth foot (fig. 11) consists of one joint, about thrice as long as broad, and bearing two 

 unequal apical setae ; the last thoracic somite, to which those feet are attached, is in the 

 female very small. The second, third, and fourth abdominal segments (fig. 12) are in 

 the female imbricated or lunate at the sides, the first is small, the second much wider, 

 the rest gradually decreasing in width to the last ; caudal stylets elongated ovate, more 



