On new Mammals from TropicaJ South America. 5i;5 



subequal to each other in len^-th, very slender, with short 

 sfiines on the outer curve and longer ones on the inner. 

 Uropod 2 (fig. 9) : peduncle much shorter and nearly twice 

 as stout as that of uropod 1 ; rami subequal to it in length ; 

 the inner ramus, of the form cliaracteristic of the genus, is 

 much longer and narrower than in loiigipes ; it is actually of 

 the same length as the outer ramus, but appears sliorter 

 through being inset at a different level. Uropod 3 (tig. 10) : 

 peduncle broad, sliorter than the rami; inner ramus slightly 

 the shorter, margin serrated, furnished with sensory spines 

 and 1 plumose seta proxirnally ; outer ramus 2-jcinted, outer 

 margin with spines, inner margin serrate, with 3 long 

 plumose setae; a setule in each apex. 



Telson (fig. 11). — The sixth pleoii-segment is produced in 

 an acute process on either side of the telson ; in longipes these 

 processes are shorter an 1 rounded. 



It tapers distally ; cleft to nearly three-quarters the length ; 

 apices serrate on the inner side, each with 1 strong spine 

 inset ; a pair of mobile ciliated hairs on either side of the 

 cleft. There were 6 spines on one side in the largest female 

 examined, 4 on the other (probably two have been broken 

 off), but the number is less in the smaller specimens. 



EXPLANATION OF PLATE XIV. 

 Fig. 1. Side-plate 4, x 17. 



Fiy. 2. Epimei'on of the third pl^n-segraent, X 17. 

 Fig. 3. Left mandible, X o8. 

 Fig. 4. Right mandible, X o8. 

 Fig. 5. Maxilla 1, x 58. 

 Fig. 6. Maxillipeds, x 58. 

 Fig. 7. Gnathopod 2, X 42. 



Fig. 8. Fing-er and one of tlie spines, gnathopod 2, X 265. 

 Fig. 9. Uropod 2, x 42. 

 Fig. 10. Uropod 3, x 42. 

 Fig. 11. Telson, X 42. 



LXI. — New Mammah from Tropical Soiilli America. 

 By Oldfield Thomas. 



(Published by permission of the Trustees of the British Museum. ) 



Phodotes tumidirostris continentis, subsp. n. 



cJ. 77; ?. 50, 78, 124. 



Quite like the lype form, as described by Miller* from the 

 I;laiid of Curasao, but markedly larger. 



* P. Biol. Soc. Wash. xiii. p. 160 (1900). 

 Ann. & Maj. N. Hist. Ser. 8. Vol. vii. oi 



