174 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1885. 

 Measurements in millimefers. 



Catalogue number. 

 Station 



Sex 



Length from tip of rostrum to tip of telson. 



Length of carapax including rostrum 



Length of rostrum 



Height of carapax 



Breadth of carapax 



Length of ove-stalk and eye 



Greatest diameter of eye 



LeuL'th of antennal scale 



Breadth of antennal scale 



Length of second gnathopod 



Length of tirst i)eriEopod 



Lengt h of carpus 



Lingth of (-hela 



Breadth of chela 



Length of dactylus 



Length of second perajopod 



Length of carpus 



Length of chela 



Breadth of chela 



Length of dactylus 



Length of third perseopod 



Length of merus 



Lengt h of carpus 



Length of chela 



Breadth of chela 



Length of dactylus 



Length of fourth peraeopod 



Lengt h of mems 



Length of carpus 



Length of propodus 



Length of dactjlus. 



Length of iifth perseopod 



Length of merus 



Length of carpus 



Length of propodus 



Length of dactylus 



Length of sixth somite of pereon 



Height of sixth somite of pereon 



Length of telson 



Length of inner lamella of uropod 



Breadth of inner lamella of uropod 



Length of outer lamella of uropod 



Breadth of outer lamella of uropod 



7263 

 2143 



d 

 105 



36.5 



16.5 



11.5 



11.5 



10.0 

 8.5 



19.0 

 5.0 



30 



24 

 4.8 

 5.8 

 1.3 

 3.7 



81 



10.0 

 5.4 

 L2 

 3.0 



40 



12 



16 

 6 



1.0 

 3.0 



42 

 15 

 14 



5.5 



3.2 

 15 



8 

 17.5 

 14.0 



4.0 

 19.0 



4.8 



7262 

 2125 



? 

 140 



54 



25 



18 



17 



12 



10 



24 

 7.7 



45 



32 

 6.5 

 8.0 

 1.9 

 4.7 



44 



14 

 7.0 

 1.7 

 4.0 



55 



15 



22 

 8 



1.4 

 3.9 



45 



14 



11 

 6 

 4 



55 



18 



17 

 7.5 

 4.0 



20 



11 



22 



18.0 

 5.0 



25.0 

 6.1 



This species was taken in 1884, at two stations in the Caribbean Sea, 

 hy tbe Albatross : Station 2125, February 18, soutb of Curagoa, north 

 latiude 11° 43', west longitude 69° 9' 30", 208 fathoms, yellow mud and 

 sand, temperature 50°.l, two females ; and station 2143, March 23, Gulf 

 of Darien, north latitude 9° 30' 45", west longitude 70° 25' 30", 155 

 fathoms, green mud. 



Parapeuaeus constrictus. 



returns constrictus Stimpson, Ann. Lye. N.at. Hist. New York, x, p. 135, 1871. 



Numerous specimens were taken in 1881 by the Fish Hawk, off 

 Chesapeake Bay, in 18 fathoms, and in 1884 by the Albatross, off Cape 

 Hatteras, in 7 to 27 fathoms. I have also examined specimens from 

 Fort Macon, North Carolina, and from Bermuda. 



All these specimens agree well with Stimpson's description except 

 that the carina of the carapax is scarcely grooved longitudinally, though 

 distinctly flattened, at the cervical suture. The dorsal crest of the 

 rostrum proper is armed with seven to nine equidistant teeth, and back 

 of these, on the carina of the gastric region, there is a small tooth, de- 



