192 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



JJca una Latr. {fide A. Edw.). 



Nautilograpsus minutus Edw. {fide Stm. Ann. Lye. vii. 231). 



? Acanthopus planissimus Dana {vid. Stm. Ann. Lye. vii. 232). 



? Aratus pisoni Edw. {vid. Smith, Eep. Peabody Acad. Sci. 1871, 92). 



? Goniopsis cruentatus De Haan {vid. Smith, I. c. 92). 



Petrolisthes armatus Stm. {fide Stm. Ann. Lye. vii. 73). 



Eupagurus hernhardus Brandt {fide Stm. Jour. Bost. Soc. IS'at. Hist, 

 vi. 483). 



Uupagurus Tcroyeri Stm. {fide Stm. Ann. Lye. vii. 89). 



Crangon boreas Fabr. {fide Stm. Proc. Aead. Kat. Sci. Phila. 1860, 25). 



Sabinea septemcarinata Owen {fide Stm. Proc. Phil. Aead. 1860, 26). 



Nectocrangon lar Brandt {fide Stm. Proc. Phila. Acad. 1860, 25). 



Hippolyte spina White {fide Stm. Proc. Phila. Aead. 1860, 34). 



Hippolyte gronlandica (J. C. Fabr. sp.) Miers [R. aculeata Edw.] {fide 

 Stm. Proc. Phila. Acad. 1860, 33). 



Pandalus horealis Kroyer {fide Stm. Jour. Bost. Soc. vi. 501). 



Palcemon jamaicensis Oliv. {fide Smith, I. e. 97). 



To this list I would add : — 



Alpheus minus Say. 



Alpheus heterochelis Say. 



Alpheus transverso-dactylus Kingsley. 



Alpheus panamensis Kingsley. 



Near Alpheus minus Say. Body very compressed ; eara pax smooth ; 

 rostrum short, separated from the ocular arches by a deep sulcus ; the 

 orbital spines arising not from the anterior edge of the carapax, as in A. 

 minus, but from the superior surface, the margin beiug continuous be- 

 neath the spines ; these spines do not extend so far forward as in the 

 Floridan analogue. Basal spines of antennulse extending slightly be- 

 yond first joint ; third joint somewhat shorter than the second. Basal 

 joint of antennae with a spine beneath ; antennal scale extending slightly 

 beyond the peduncles of antennulse; flagellum nearly as long as the body. 

 External maxillipeds reacting to tip of antennal scale. Hands of the 

 first pair not so disproportionate as in A. minus ; the larger is smooth, 

 compressed, with the margins entire ; dactylus two-fifths the length of 

 the propodus, extending slightly beyond the thumb, with a tooth on 

 the oceludent margin shutting into a cavity of the thumb, as in A,. 

 minus and A. heterochelis. The fingers are slightly curved outward^ 

 and* are somewhat hairy. The smaller hand is nearly as long as, but 

 more slender than, the larger dactylus, slender, half as long as propodus, 

 trigonal, the oceludent side being furnished with a ridge, which shuts 

 into a groove in the thumb 5 the points of the fingers are curved and 

 overlapping. Feet of the second pair short; carpus five-jointed; the first 

 joint as long as the two following; second and fifth subequal, each a 

 half longer than the third or fourth, which are also subequal. Propodal 

 joints of following pairs spinulose beneath. Telson triangular, truncate. 



