NO. 1U.V,.. AMERICAN t^PECIES OF SYXALPlllJVlS—COUTlKRH. 57 



under discussion. The meropodite is also thickened in the same 

 proportion in S. goodei; (4) by the meropodites of the third pair 

 longer and more slender (proportion 1 : 4.2 instead of 1 : .^.5). 



I have met only one adult male which appears to be referable to 

 this form; the carpus of the small cheliped measures 0.54 of the total 

 lenolh of the chela. It is accompanied by several other specimens, 

 but they are too incomplete to permit of the appreciation of the fine 

 distinctions which separate S. goodei and S. longicarpus. 



I hesitate to consider this form as specifically distinct from S. longi- 

 carpus, although the adult specimen differs from it only by the pres- 

 ence of an antennal scale; this is, however, much reduced. Neither 

 is the form of the anterior palmar tubercle very constant in S. longi- 

 carpus, as the small spine Avhich terminates it may be absent. It 

 seems to me sufficient to distinguish these specimens as form ap- 

 proxinia. 



Localities : 



S. longicarpus — 



North Carolina : 



Off Cape Fear, 15 fathoms. Albatross Station No. 2623, 

 20 to 30 si:)ecimens. 

 Gulf of Mexico : 



Lat. 27° 4' N., long. 83° 21' 15" W., 2G fathoms, Alba- 

 tross Station No. 2409, 7 specimens. 

 Lat. 26° 33' N., long. 83° 10' W., 28 fathoms, Fish Hawk 



Station No. 7123, 1 specimen. 

 Lat. 26° N., long. 82° 57' 30" W., 24 fathoms, Albatross 

 Station No. 2413, 4,000 to 5,000 specimens. 

 Yucatan : 



Off Cape Catoche, 25 fathoms. Albatross Station No. 



2362, 20 specimens. 



Off Cape Catoche, 21 fathoms. Albatross Station No. 



2363, 15 to 20 specimens. 



Jamaica, in massive black sponges, 10 to 12 fathoms, J. E. 



Duerden. 

 Curagao, 2 specimens. 

 S. longicarpus approxima — 



Gulf of Mexico, 26 fathoms. Albatross Station No. 2409, 4 



specimens, type. 

 Gulf of Mexico, 24 fathoms, Albatross Station No. 2413, 2 



specimens. 

 Gulf of Mexico, 26 fathoms. Albatross Station No. 2414, 4 



larger specimens (mutilated). 



Type of S. longicarpus approxinia.— Cat. No. 38398, U.S.N.M. 



