94 Addison E. Verrill, 



Synalpheus hemphilli Coutiere. Small Snapping Shrimp. 



Synalpheus hemphilli and var. longicornis Coutiere, op. cit., p. 38, figs. 



b, 20, 21, 1909. 



? Synalpheus neptunus M. J. Rathbun, Brach. and Macr. Brazil, p. 110, 

 1901 (not Dana's sp.). 



PLATE XXXIII; FIGURES 3, 30, large chela (slide ddd). PLATE XXXIX, 

 FIGURES 20-, 2b. PLATE XL, FIGURES i-ic, details. All var. longicornis. 

 By A. H. V. 



The rostrum is very slender, styliform, and about twice as long 

 as the orbital spines, which are triangular, with wide bases (pi. 39, 

 fig. 2 ; pi. 40, fig. i ) . The ambulatory legs are quasi-triunguicu- 

 late, with the lower terminal claw stouter and much more bent 

 than the upper one, diverging at nearly a right angle, its inner edge 

 a sigmoid curve ; proximal to the latter there is a small acute spur, 

 so that the claws seem to be somewhat triunguiculate. 



In the Bermuda variety (longicornis Coutiere) (pi. 39, figs, za, 

 2b, after Coutiere; pi. 40, figs, i-ic} the antennal scale is longer, 

 narrow, and reaches to the end of the antennular peduncle or 

 exceeds it. The lateral basal spine is equal in length to the anten- 

 nular spine and reaches the proximal third of the second joint. 

 The superior basal spine is smaller, but acute. The meropodite of 

 the third pair of legs bears a slender distal movable spine on under 

 side, and a spiniform angle above. 



Coutiere records this species from West Florida, 21-28 fathoms, 

 and as var. longicornis, from Bermuda (coll. Goode). It was also 

 taken by my party in 1901. I have specimens from Fort Macon, 

 N. C. 



It is apparently the species recorded from Bermuda, by Miss 

 Rathbun, under the name of ^. neptunus (Dana). The latter is 

 evidently distinct.* Miss Rathbun gives but few descriptive 

 details, but she mentions the triunguiculate claw, which is not a 

 character of any other Bermuda species known to me. 



The following description is from a Bermuda specimen of the 

 variety longicornis: The body is about 22mm long; thorax, 

 9 mm ; breadth, 5 mm. The eyes are separated by a space equal 



* See the new description by M. Coutiere, op. cit, p. 88, 1909, of 

 S. neptunus from the Indo-Pacific. See also our plate XXV, figures 2a-e, 

 copied from Dana. It belongs to the Biunguiculatus-group, which is not 

 found in American waters. 



