io8 Addison E. Verrill, 



The specimens formerly labelled by Prof. Kingsley as A. minus, 

 from the Pearl Islands, Bay of Panama (No. 7420,, 742?), Yale 

 Museum), are now before me. These specimens resemble 

 S. minus in size and form. They belong to two species, both 

 different from any of the Atlantic species. 



The larger species (7420), which I have named 6\ bradlcyi, has 

 a rostrum longer and stouter than in S\ minus, its tip reaching the 

 end of the first antennular segment. The orbital spines are 

 decidedly shorter and smaller, narrow and acute at tip, but with 

 wide bases. It has a small superior spine on the basicerite, as 

 in minus. The antennular spine reaches nearly or quite to the 

 distal end of the second antennular article. (See plate xxxiii, figs. 



1,2.) 



The smaller species (742^) has a very small and slender rostral 

 spine, shorter than the orbital spines, which are also small, but 

 acute-triangular. The larger chela is shorter and more swollen 

 than in the last. This appears to be identical with S. digue ti Gout, 

 from the Gulf of California. Both these species will be more 

 fully described elsewhere, with other extralimital species. 



Synalpheus minus, var. somersi Ver. new var. 



PLATE XXXIII, FIGURES 4, 43., chela of female; 5, sa, of male, No. 62. 

 PLATE XXXIV, FIGURES I-IM, $, No. 62. PLATE XXXVI, FIGURES 

 i-ic, 2, No. 62. All by A. H. V. 



This form differs from the typical one especially in the much 

 stouter carpocerite and the longer and wider antennal scale and 

 spine. The antennular peduncle is also stout ; breadth to length, 

 i '.4.6', the articles are about as 2.6: 1.9: I. The stylocerite (pi. 

 34, fig. la, as) reaches nearly to the middle of second article. 



The carpocerite (figs., \b, cc) is stout, swollen proximally, 

 width to length about as I : 4.6; its spine (si) is large, very acute, 

 about as long as carpocerite (pi. 36, fig. 2) ; the scale (s) is wide 

 with an evenly convex inner edge and obtuse tip; it is nearly as 

 long as the spine and distinctly wider in middle (pi. 34, figs, ib, s'). 

 The basicerite is nearly half as long as the scaphocerite ; its 

 secondary spine is small, acute, longer than wide. 



The third maxilliped (pi. 36, fig. le, n'") is long and stout, 

 especially the third article, width to length 1:5; the fourth article 

 is about one-seventh the third, and about as broad as long ; distal 



