Decapod Crustacea of Henniula, Part II. 91 



of legs of second pair less than 10 times longer than wide. The eggs 

 are small and hatch Z oca-like larvae. 



h. Rostrum equals or slightly exceeds the ocular teeth in length. 5". minus. 



hh. Rostrum is somewhat shorter and narrower than the ocular teeth. 



5". digue ti* 



BB. Dactyls of the third to fifth pairs of legs small and short; their 

 hooks very small, subequal in length, strongly curved in line with 

 the margins of dactyl, not divergent. Scale of the scaphocerite usually 

 much reduced, often rudimentary or lacking in one or both sexes ; 

 lateral spine of basicerite longer than the first antennular segment; 

 stylocerite short, not exceeding basal antennular segment. Smaller 

 chela has fingers toothed at apex and a dense brush of long porrect 

 hairs on the dorsal side of the dactyl ; its carpus is longer than wide. 

 Telson usually rapidly narrowed to a narrow tip ; terminal plumose 

 hairs few, about 4 to 6. Outer lobe of uropods is often serrate 

 distally. Several species have large eggs and Mysis-like larvae. The 

 species are numerous in the West Indies Icevimanus-group. 



i. Carpus of smaller cheliped is more than one-half the length of the 

 chela in the adult (usually 0.54 to 0.8). Lateral spine of basicerite is 

 smaller than that of the scaphocerite. 



j. Movable finger (dactyl) and pollex of smaller chela each with three 

 strong flat teeth crossed in a vertical plane ; no antennal scale ; spine 

 of the scaphocerite shorter than the antennular stalk. Dactyl of the 

 large chela placed obliquely. Eggs are large S. pectinigcr* 



jj. Fingers of the smaller chela each provided with only two teeth. Spine 

 of the scaphocerite equal in length to the antennular stalk. Scale of 

 scaphocerite small, present at least in the male S. longicarpus. 



ii. Carpus of smaller cheliped is less than half as long as the chela (about 

 0.43 to 0.40). Merus of third pair of legs is not excavate; its carpus 

 is shorter than the propodus. The brush of hairs on the dactyl of 

 the smaller chela is large, containing 15 to 20 rows. Carpocerite is 

 5.2 to 6 times longer than wide. Antennal scale is present in both 

 sexes S. goodei 



Those species marked with an asterisk (*) are extralimital, from the 

 West Indies or Panama. 



Special characters to aid in the identification of the known Bermuda species 



of Synalpheus. 



i Rostrum notably longer than the ocular spines and spiniform or 

 narrow in a dorsal view. 

 S. townscndii; hcmphilli; fritzmulleri elongatus. 



2. Rostrum notably narrower than ocular spines in a dorsal view, but 

 not much, longer. 

 5". jrHzmulleri; goodei; longicarpus. 



