292 W. B. BENHAM. 



Fig. 10, — Deinodrilus. a. Genital system, sp. Anterior 

 spermatheca. pro.i, pro.^ The t^vo prostates of one side, b} 

 Alimentary system, g. Gizzard occupying two somites. 

 EPN. The extra-buccal pepto-nephridia. A connection exists 

 here and there between the uephridial network of neighbouring 

 somites. Beddard says but little of the alimentary canal or 

 the nephridia, but special groups (epn.) of the latter occur in 

 Somites ii, iii, and iv. c. Exterior of these somites^ showing 

 the characteristic twelve setae and numerous nephridiopores. 

 Constructed from Beddard's description of D. benhami in 

 ' Quart. Journ, Micr. Sci,/ xxix^ p. 105. 



Distribution : New Zealand. 



Family III. — PERiCHiETiDiE. 



Fig. 11. — Perichseta. a. Genital system. Modified from 

 Rosa's figure of P. fese in ' Ann. Mus. Civico d. Stor. Nat. di 

 Genova/ vi, 1888, pi. iii. b. Alimentary system, g. Gizzard, 

 occupying more or less of three somites, p. The first, and p.^ 

 the last, of the thirteen pouches. Nine somites are cut away, 

 as they are merely a repetition of these pouches, c. The 

 characteristic cylindrical csecum of one side. [These are 

 absent in some species.] s. The commencement of the sac- 

 culated, typhlosolar intestine. Composed partly from Perrier's 

 and Rosa's description. The excretory system is taken from 

 Beddard^s figure of P. aspergillum in 'Quart. Journ. Micr. 

 Sci.,' xxix, pi. xxiv. The black dots represent the funnels 

 of the nephridial network, c. represents three somites from 

 different regions of the body of P. monticolla, Fletcher, 

 ' Proc. Linn. Soc. N.S.W.,' vol. ii. In Somite a, from anterior 

 part of body, only sixteen setse are present ; in Somite b, from 

 about Somite xv, there are thirty set8e,and posteriorly in Somite 

 c fifty or more. This same variation in numbers occurs in 

 other species. The nephridiopores (represented as small 

 dots) are drawn from Beddard's description of P. asper- 

 gillum. 



Distribution of the genus : India (with Ceylon), Malaya, 

 Australia, and islands between the tw^o continents. 



