88 



PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



of the basicerite: the Literal spine of the scale does not reach the 

 middle of the distal article of the antenniile. The carpocerite is 

 only a little longer than the antennule (one-half of the distal article) 

 and is 5.3 times longer than wide. 



The proportions of the large chela are: Fingers 1; total length 

 4.15; height 1.7. The anterior border of the palm is terminated by 

 a strong horizontal j^rominence, conical and sharp-pointed. The 

 meropodite has its snperior margin unarmed; it is 2.25 times longer 

 than wide. 



The proportions of the small chela are: Fingers 1; total length 

 2.25; height 0.75; the fingers are almost as long as the palm. The 

 movable finger is enlarged laterally, and bears on each margin 5 to 7 



Pig. 53. — Stnalpheus neptixis. n, frontal and antennal region of a type male; 

 a', frontal and antennal region of another type male with basicerite more 

 SPINOUS ; m", front ; K, large chela ; K" , carpus and meropodite of large 

 cheliped ; k, small chela of first pair; fc', small cheliped op first pair; I, foot 

 of second pair ; m, foot of third pair ; m', dactyl of third pair ; i, telson ; 

 u, uropods. 



hairs regidarly sj^aced, which are perhaps the first indication of the 

 transverse series of haii's present in all of the L.evimanus group. 

 Each of these fingers is terminated by a single point. The carpus 

 measTires only 0.25 of the entire chela, a proportion which is never 

 attained in the L.i:vi:MANrs. The two chela» are in the proportion of 

 1 to 2. 



The second pair has very peculiar proportions, the first segment 

 of the carpus 1, the sum of the four following segments 2, distal 

 cliela 2. 



The proportions of the third pair are : Meropodite 2.3 ; carpus 1 ; 

 propodite 1.9 ; meropodite 4 times as long as wide. The two hooks of 



