42 MARINE INVERTEERATA OF GRAND MANAN. 



middle of the caudal styles, and on the exterior or first pair of natatory feet. There 

 are also a few black dots on the legs. The length of the largest specimen is O.G2 

 inch. The proportions of the other parts to the length are as follows : breadth, .24 ; 

 length of longest (5th) thoracic segment, .11; of the abdomen, .34; of the terminal 

 abdominal plate, .20; of the longest leg (of 6th segment), .41. Found on the fine 

 sands at low-water mark on High Duck Island. A species from Charleston, S. C., 

 Harbor (JE. concharum, St., n. s.), resembles this very closely, but the superior 

 antennae are shorter, the eyes larger and triangular, the last epimer reaching only the 

 third abdominal segment, the inner lamina of the caudal styles thinner and broader, 

 and the legs proportionately broader. The color is nearly the same. The length 

 is 0.9 inch; of which the proportions corresponding to those above are, .23, .15, 

 .29, .16, and .33. 



ANISOPODA. 



PRANIZA CERINA, St., n. s., Fig. 31. This curious little Isopod resembles P. 

 ccerulata, of the coast of Great Britain, in its proportions, but is very distinct from 

 that species in its details. The two reduced neck segments are very small and 

 narrow, but nevertheless distinct ; and the rings are not difficult to make out, even 

 on the ventricose middle portion of the body. The rudimentary legs of the first 

 two thoracic segments reach forward nearly to the extremities of the mandibles. 

 They are pressed against, and seem to constitute a portion of the mouth parts, 

 and one pair is provided with strong hooked nails. The remaining five pairs of 

 well-developed feet are long, but almost filiform, and somewhat hairy ; the last pair 

 but one being shortest. The superior antennae are shorter than the inferior ones, 

 of which a flagellum of about seven articulations constitutes nearly one-half the 

 length. The eyes are prominent, bulging out from the sides of the head. The 

 natatory feet are of large size, with very long plumes of hairs ; the fifth pair being 

 much smaller than the rest. Caudal styles hairy on their edges, the inner one of 

 each pair broadest and with pointed extremity, extending considerably beyond the 

 end of the triangular caudal segment. Its color a pale yellowish or waxen. 

 Length of body, 0.22 inch ; of which the proportions of the other parts are : length 

 of head and first four segments, .27; of the abdomen, .32; of the longest leg (that 

 of 5th thoracic segment), .32; width of body at the third segment, .11; at the 

 sixth, .37; at the abdomen, .07. Many specimens were dredged on gravelly and 

 coralline bottoms in 20-30 fathoms in the Hake Bay. 



With the above, and in about equal numbers, was taken another form, which, 

 with some doubt, I am at present inclined to consider the female of the same species. 

 In color and details it differed from P. cerina but slightly, but the proportions were 

 very different; as the very ventricose middle .portion of the body, which in every 

 case was filled with eggs, constituted nearly the whole of the animal ; the head and 

 abdomen being very short, and projecting but little beyond it. 



ANCEUS AMERICANUS, St., n. s. Body very regularly rectangular, abruptly nar- 

 rowed at the commencement of the abdomen, which has the appearance of another 

 very small rectangle set into the first, and of only one-third its width. It is of a 



