78 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



are here very stout; compared with two specimens of almost equal 

 size (17 mm. for JS. herricki female; 15,5 mm. for S. tanneri female 

 type), these appendages are in the ratio of 0.8 in total length and 

 thickness ; the proportion of the segments of the carpus is no longer 

 the same, the first segment being here shorter than the sum of the 

 four others, as in the female of herricki; the feet of the third pair 

 are also stouter than in S. herricki., the proportions of these members 

 being about 0.8; the relative lengths of the several segments are the 

 same as in S. hemcki male; there are also some differences in the 

 dimensions of the carpocerite (ratio 5.43 instead of 4.8 in S. herricki 

 female and 5 in S. herricki male), this being more slender than in 

 the types, and there again approaching some proportions observed 

 in the male. 



Although unique, this specimen ought, I believe, to constitute the 

 type of a distinct species, for which I propose the name S. tanneri, 

 in honor of the late Z. L. Tanner, formerly commander of the Alba- 

 tross. 



Localities (for >S'. herricki and allies) : 



Anclote, Florida ; Capt. Thomas Low ; about 150 specimens (types 



of S. herricki) . 

 Gulf of Mexico, lat. 25° 50' 15" N., long. 82° 41' 45" W., 21 

 fathoms. Fish Hawk Station No. 7124, 1 specimen {S. her- 

 ricki) . 

 Anclote Section, 't'lorida, 124 fathoms. Fish Hawk Station No. 



7106, about 30 specimens {S. herricki). 

 Anclote Section, Florida, 12J fathoms. Fish Hawk Station No. 



710G, G specimens (type of form dimicliatus). 

 Anclote Section, Florida, 12| fathoms, Fish Hawk Station No. 



710G, 1 specimen (type of form angustipes) . 

 Gulf of Mexico, lat. 29° 15' 30" N., long. 85° 29' 30" W., 27 

 fathoms. Albatross Station No. 2372, 1 specimen (type of S. 

 tanneri) . 

 Type of .S'. herricki.— Cat. No. 38404, U.S.N.M. 

 Type of S. herricki dimidiatns.—Cnt. No. 38405, U.S.N.M. 

 Type of S. herricki augustipes.— Cat. No. 38406, U.S.N.M. 

 Type of S. tanneri.— Cat. No. 38407, U.S.N.M. 



SYNALPHEUS PECTINIGER, new species. 



While recalling the preceding species by its small size and very 

 large eggs, this form is also closely allied to S. lonr/icarpus Herrick, 

 and may easily be confounded with small specimens of that species. 



The frontal margin has three wide teeth, the median narrower in 

 its distal half and a little longer than the lateral, but the width of the 

 intervals separating them is always greater than their depth. 



