472 OLIGOCHAETA 



segment at which they first appear. ROSA examined only two immature examples and 

 his account of the species is therefore not very full. 



(5) Pontodrilus phosphorous (DUGES). 



Lumbricus phosphorous, DUGES, Ann. Sci. Nat. viii (2), 1837, p. 17. 

 Photodrilus phosphoreus, GIARD, C. R., 1887, p. 872. 



Definition. Length, $omm.; diameter, i mm.; number of segments, no. Setae in eight 

 rows. Clitellum, XIII-XVII. Heart* in X-XII. Sperm-sacs in XI, XII. Spermathecae 

 in IX with a divertieulnm. Hab. France. 



This species has been investigated by GIABD, who however has not yet published 

 an illustrated account of his researches. The main facts in its structure are given 

 in the above definition. In addition to the points there mentioned there exist on 

 segments xii, xiii, and xviii sacs of modified setae in addition to the ordinary ventral 

 setae ; instead of a bundle of about four setae there is sometimes only a single seta. 

 This worm appears to be luminous at night, whence the name given to it by DUGES. 



Genus TYPHAEUS, BEDDARD. 



DEFINITION. Clitellum, XIII-XVII ; male pores on XVII. Nephridia diffuse. 

 Testes and funnels a single pair. Spermathecae a single pair. Spermiducal 

 glands tubular, furnished with penial setae. 



This genus was founded by myself in 1 883 for an earthworm from Calcutta ; since 

 that time four additional species have been made known by BOURNE (3), ROSA (8), 

 and myself (48). Without exception all the species of the genus are natives of 

 India, Ceylon, and Burmah. Although the above definition will serve to distinguish 

 Typhaeu8 from any other genus of the Cryptodrilidae, there are other characters 

 which are very possibly of generic value, in addition to those already made use of. 

 I have not used these in the definition inasmuch as no definite statements have been 

 made about certain of them in the two species examined by ROSA, which were in 

 a very poor condition for anatomical examination. In all the three species of whose 

 anatomy we possess at all sufficient data the intestine is furnished with a series of 

 about six pairs of reniform glands lying on its dorsal surface. I have described these in 

 T. orientalis and T. gammii ; BOURNE has referred to them in T. masoni; their minute 



