NO. 1716 SNAPPING SHRIMPS FROM DRY TORTUGAS—COUTIERE. 487 



reaches the extremity of the median antennular article. The anterior 

 pahnar border of the large chela is unarmed. Lastly the posterior bor- 

 der of the telson is very convex, and the spines at the angles are shorter 

 than in typical S. townsendi. These last three 

 characters connect the new form with S. 

 townsendi hrevispinis from Lower California. 

 Type-specimen. — Cat. No. 40019, U.S. 

 N.M., from the Dry Tortugas, Florida, col- 

 lected by J. F. McClendon. 



SYNALPHEUS BROOKSI Coutiere. 



Lives in the loggerhead sponge and no- 

 where else, according to Doctor McClendon. 



SYNALPHEUS MCCLENDONI, new species. 



Fig. 2.— SYNALPHEUS TOWNSENDI 

 SCAPHOCERIS. O. CARPOCERITE. 



n. Anterior region, t. Telson. 



This species is very like S. sandithomse Coutiere, from which it is 

 distinguished by the following characters: The stylocerite reaches 

 the extremity of the basal antennular article. The spine of the 

 scaphocerite is very stout, wider than the scale, and slightly over- 



reaches the antennule. The scale does 

 not exceed the middle antennular arti- 

 cle. The carpocerite is at least 5 times 

 as long as wide. The large claw is more 

 slender and the fingers more elongated 

 than in S. sandithomse. The thickness 

 of the palm is scarcely greater than the 

 length of the fingers, while the propor- 

 tion is equal to 1.28 in the species cited. 

 Furthermore, the fingers are curved in- 

 ward, and flattened, crossing at their 

 extremities. The upper border of the 

 palm is terminated by a sharp and 

 regularly conical spine. The telson is 

 wide at its extremity ; its posterior bor- 

 der is contained only 2.8 times in its 

 length, instead of 4.7 times in S. sanc- 

 tithomse. 



Fig. 3. — SYNALPHEUS MCCLENDONI. O. CAR- rrii ••11 il 



pocerite. 6. Large chela, c. Small This species belongs Very near the 

 CHELA, d. Third foot. n. Anterior form whicli I described as S. longicavpus 



approxima , but it differs from it in the 

 shape of the large chela, in the meropodite, the supero-external bor- 

 der of which is unarmed and regularly rounded, and in the telson, 

 which is broader at the extremity. 



Type-specimen. — Cat. No. 40018, U.S.N.M., from the Dry Tortugas, 

 Florida, collected by J. F. McClendon. 



