176 Bulletin, Yanderhilt Marine Museum, Vol. Ill 



Synalpheus fritzmulleri Coutiere. 



Plate 64. 



Type: From Florida, Cat. No. 6970, United States National Mu- 

 seum. An additional series of typical specimens, are also in this 

 Museum, chiefly from Florida and "West Indian stations, but also in- 

 cluding one from Lower California. 



Distribution: West Indian region, as far north as Fort Macon, 

 Ga. ; Lower California, represented by a single station. 



Material examined : One specimen, collected on Pigeon Key, Fla., 

 by the ''Ara." 



Technical description : This species was named for the naturalist, 

 Dr. Fritz Muller, and designated by Dr. Coutiere as representative 

 of his Neomeris group of the Synalpheidae. The rostral spine is 

 slender, slightly longer than the orbital spines and well separated 

 therefrom, with the proximal part of its margins subparallel, con- 

 vergent distally; the orbital spines are acute, reaching to about the 

 middle of the basal antennular article. The sinus between the spines 

 is U-shaped; the eyes are subcircular, shielded. The carapace is 

 robust, glabrous, the abdomen stout, the epimeral regions well de- 

 veloped, especially in the female, forming a deep brood pouch. The 

 telson is one and three-fourths times as long as the preceding segment, 

 the outer distal angle obtuse, armed with two acute movable spines 

 on each side, the inner spine being twice as long as its companion, 

 acute; armed on the dorsal surface with two pairs of articulated 

 spines; the distal margin slightly convex, fringed with about twenty 

 setae. The outer blade of the uropoda has three flexible spines at the 

 subdistal terminus of the outer lateral margin. 



The stylocerite is very narrow and acuminate, its tip reaching to 

 slightly beyond the middle of the second antennular article. The 

 antennules have the peduncular articles as illustrated ; their ratio 1.5, 

 1.1, 1, beginning at the base; the outer flagellum bifurcates at about 

 the eighth ring. 



The antennal basicerite bears on its inner dorsal distal angle an 

 acute spine and at its outer lateral distal angle a much longer acute 

 spine about three-fourths as long as the stylocerite with its tip slightly 

 outward curved. The scaphocerite is about equal in length to the 

 antennular peduncle and has the thickened outer lateral border 



