PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 1G3 



Rev. A. M. Xorman, appears to agree perfectly with the males of this 

 species, though not wiih Kroyer's description of Tana is Eilirari!*n. I 

 have not therefore united my species with his, though I think it possi 

 ble they may prove identical. 



The species occurs in considerable abundance at Xoank Harbor, Conn., 

 among alga-, and also at Vineyard Sound, and will probably be. found 

 at other localities on the southern shore of New Kngland. It has also 

 been collected by Professor Yerrill, during the pres<'iit summer, at Pro- 

 vincetown, Mass., in company with Liniuoriu and ('In Inrti. in old piles. 



The genus I^jtiocln-rm has several \ears' priority over J'r<ihumlx, and. 

 though founded on the male sex, on-lit, as 1 think, to be retained. 



Leptochelialimioola=ParatanowZtinicoZaHaxger ) Am. .Inn:. Sci., Ill, vol. sv,p.378, 



]-; . 



Massachusetts Hay, oil' Salem, is fathoms, mud. 

 Leptochelia rapax, n. 8. 



Females of this species considerably le-emble these of L. UntlcolH, 

 but may be distinguished by the following characters: The eyes are 

 larger and more conspicuous; the last segment of the anteiinuhe is 

 scarcely longer than the preceding, instead of nearly tv, ice as long, as in 

 7,. li/iiirulii ; the dad \lii> of the second pair o!' legs is somewhat shorter 

 and the terminal spine less at tenuated, and the external ramus hf the 

 UTOpods Consists Of 3 single vcr\ short and small segment, shorter than 

 the basal segment of the inner ra mils, \vhidi is not elongated. The inner 

 ramns is live-jointed, instead of six jointed, aa in L. <ilt/ic'>!. 



The males are remarkable for the long and slender prehensile ha, id 

 terminating the first pair of legs. The body of the males is short and 

 robust, with the segments well marked by constrictions. The head, 

 with the united lirst thoracic segment, is short and rounded, bulging 

 strongly at the sides just behind the eyes, which are conspicuous, some- 

 what less in diameter than the bases of the an ten nuke, distinctly articu- 

 lated, and coarsely faceted. The antennul;;- are el.aigaied. especially in 

 the basal segment, which is moiv than one-third as long as the body, 

 slighth svollen on the inner side, near the base, then tapering to the 

 tip; the second segment is cylindrical, less than half as long as 

 and more slender than the lirst; the third is less than half the 

 length of the second, and is followed by about eight short llagellar seg- 

 ments, the last one tipped with seta-. The antenna-, when extended, do 

 not attain the end of the basal antennular segment; the first three seg- 

 ments are short, the fourth longest, being longerthan the lirst three 

 together, the lii'th slender and tipped with set;:-. The terminal - 

 of both antennuhe and antenna- arise in part from minute or rudime:; 

 tary terminal segments. The first pair of legs forms the most striking 

 feature of this species. These legs, when extended, are in general 

 longer than the body of the animal, though they vary considerably 

 in sixe, being usually proportionally smaller in the smaller specimens. 

 In these legs, the segments preceding the carpus are short ai;d robust; 

 but the carpus is about half as long as the body, and the propodus 



