-J2 CALIFOKXIA AfADKMV n|- SCIENCES. 



C()ii>i(l(i((l 11- oin larj^cst f;ulliwcimi, lliuiij^li very variable, a- iiii>:;lil Ijc ex|H'cttnl. 

 Tlic smallest ailiill wniiiis iiieasure alxiiit 1.^ inches by :5 lines, llie iarj^est again (! 

 inches bv I lo 1.', lines, ihe size appears t(j(le|)en(l greatly un the loealitv and richness 

 (»!" the soil. The j)iost(>ininni divides somite i to about A or jf (lig. I'iU). Somiles vii, 

 viii, ix, are larger than the other aiitcrioi- xmiites. The clit(dlar somites (figs. 12o to 

 l.".l) all' large, the post-clitellar ones are veiv niiicli -iiiiillii-. The s|)ermathecal 

 pores arc ni<pic or less conspicuous (lig. 1U!> syVA.), sometimes hardly visible, at times 

 again elevated and appearing as small round rings. They are situated just lateral to 

 seta' *_', but of course in the intersegmental grooves between vii viii and viii ix. The 

 ovipnrcs aic closer together, situated a little more ventrally than seta- 1, sometimes, if 

 not generally, coiiiiecled by a (le]>ressi(in. The clilclliim is diily dcNcloprd dorsally 

 and laterally, the ventral part between tiie male pores ining normal and appearing as 

 considerably depressed, in hardened specimens the depression reaching as far foi'ward 

 as to the center of somite xiv or the ovipores. 



The male pores which open in line with seta' 2, are situated oneitherside on an 

 elongated |)apilia, which again is more or less surrounded by a circular depression, 

 outside of which is seen a high semi-circular ridge, which is thicker anteriorlv ami 

 posteriorly than laterally (lig. 2"), 120). The penial set;e are one pair in each 

 pore, and are seen protruding through the male-pore. 



The regular set;e are sigmoid, not greatly bent. The seta: of the inner couples 

 are closer than those of the outer couples; all the setie are in parallel rows (fig. 24). 

 The nephriilio-pores are didicult to view from the outside. Their arrangement is 

 variable, but the majority are found outside of, or more lateral than the fourth row of 

 setie. The three anterior ne|)hridio-pores arc seen in front of seta; 4 (fig. 24). A 

 more detailed descrij)tion will be given further on. 



Scfd . The ordinary seta' have been ali'eady described as sigmoiil. There 

 arc two sacs of penial setu' attendant to each ]irosl;itc, and npcning in the same pore, 

 but not in (he same duct, as that organ. There is only one seta in each sac. This 

 seta is sickle-like, much more curved than those in Deltania. The point is needle- 

 like, and curved (iigs. 122, 12;!). The very point is void of sculpture, but the part 

 back of the point and up lo ilie sac is sculptured as in the lignre \'2'->. The largest 

 pari of llie seta is smoolb, mdv >li(iwiiig the rings for- the attachment of the muscles. 

 The inirer' corrples of st'ta' of the (dil(dlirnr are somewhat r'aised, ihorrgh otherwise not 

 dillereiitiated. 



ANATOMrc Ai, sTiM'crri;!:. 



The /»/f///-/'7/// (Iigs. ill. I l."i, lie, 117, MS). The body-wall i)rrl-idc of the 

 clilellnrir shows tin; usual sets of layers. The irrrierrrrosl vascular layer', which covi'rs 

 llic lorrgilirdiri;il rirrrseirlar' layer-, is very thick anil pr-omineiit, though not very 

 cr-owded with bhxjd vessels (lig. 111). Iridcr- tlii- layer-, aird l)etweerr it aird the 

 longitudirral nuiscles, passes the spermducl, almost throughout its length, from the 

 place where the two ilucts unite to the one where they rise to join the spernuluct. 

 'J'his layer is less pronounced anterior- to (dilellrirrr. and ajipears aiiseni irr the vicinity 



