280 Dr. T>. E,osa on some 



stron£>-ly sacculated region, which extends over eight somites 

 (18-25). I have found no trace of intestinal cffica *. 



The dorsal vessel, where it runs above the surface of the 

 gizzard, is very narrow ; anteriorly it soon breaks up into 

 small branches : behind the first pair of lateral hearts it 

 begins to increase in diameter, but it becomes markedly 

 anipullated only in somites 13^ 14, 15; posteriorly to these 

 it retains its large diameter, but the moniliform appearance 

 becomes gradually inconspicuous. 



In each of the somites 7, 8, 9 the dorsal vessel gives off 

 a pair of narrow lateral hearts which join the ventral vessel. 

 Behind these, in somites 10 and 11, there are two pairs of 

 large intestinal hearts which arise from the supraintestinal 

 vessel. 



Further back, in each of the somites 16 and 17, we 

 notice the presence of a pair of very largo lateral branches 

 which arise, like the lateral hearts, from the dorsal vessel, 

 and soon bifurcate and break into small branches entering 

 the wall of the intestine. Each pair of these bifurcated 

 vessels is evidently homologous with the two pairs of much 

 smaller branches which arise in each intestinal segment from 

 the dorsal vessel and give rise to the intestinal network. 



The two pairs of sperm-sacs occupy segments 11 and 12 ; 

 they are very large, discoidal, with a continuous outline. 

 Each pair communicates with a pair of large sperm-reservoirs 

 belonging to somites 10 and 11, which are fused together 

 on the median ventral line, while the anterior ones are quite 

 distinct from those of the second pair. 



The spermathecge (in segments 6, 7, 8, 9) are also large 

 bodies and end in an ovate pouch not s]iari)Iy distinct from 

 its duct, which is long, about half the length of the pouch, 

 and has no diverticula. 



The first pair of nephridia are not much larger than the 

 following; the anterior nephridia are, as usual, very long 

 and have a longitudinal course, while tiie posterior ones are 

 more transverse, but I could not determine the somite on 

 which the nephridial caeca commence to appear. 



A comparison with the diagnoses given by me in 'Terricoli 

 neotropicali,' pp. 126-128, will show at once that the species 

 above described is well-defined. 



* These intestinal cteca are not at all constant in Anteus. The con- 

 trary would appear from my expression " nel 26 segruento partouo due 

 brevi ciechi digitiformi " ('Terricoli neotropicali/ p. 122), where the 

 word taloni has unfortunately been omitted. 



