CALIFOKNIA EU DRILTD.K. 33 



Deltania Troyeri. 

 Figs. 21 to 39. 



I)rll(i iiiii 7)-iit/cri Eisc'ii. /oc, iv, 2")], OotolxT, 180;^. 



Size iiboiit 1 J inch hy I line. Septal glands comiiaralivcly laii;c, the one in 

 vi the larg.wt. One pair ol lara;e, opacjiie wpormatlieca, funiislicd with one pair of 

 divciticula, wliicli are about h or more longer than the spcrraatheca proper. Spcrni- 

 sacs ill X and xi, not lohed. One developed seta in eaeh sac of penial seta'. Pros- 

 tate is tiiltnlar, not lii'lix-like, with the top eitlier straight or bent at right angle, pro- 

 jecting Itackward. 'I'lie exterior penial [japilhe not as iironiineiit as in the preeetl- 

 ing species. The inner couples of setie ai'e further apart than in the following species. 



ITahUnl. This species was first brought to my attention by Professor Carlos 

 Troyer, of San FranciseO; who found it, together with the preceding species, in the 

 Golden Gate Park, in San Francisco, immediately north of Strawberry Hill. It 

 occurred there in sandy depressions, where the rain and drainage water had moist- 

 ened the soil in March and April. Afi the soil dried uj) the worms disappeared. 

 The worm is very scarce at any time, and not one specimen is found to every hun- 

 dred of J)('/t/inia e/egans. 



Evterior chnracteristics. Exteriorly this species is characterized at once from 

 Deltania ekgaii^i by being very much sraallei', as much so as an Enchytneus is 

 smaller than an average medium-sized Luinbricus. The length in the largest speci- 

 mens is about two inches, when stretched to its full capacity, though the average ones 

 hardly reach one inch. The width is less than one line at the clitellum and less than 

 h line at the tail end. The first somite is much longer than any of the following. 

 The second somite is next in size, while all the others are smaller and of very much 

 the same pro|iortions as in Deltania elegans. Thus iii, iv and v, are larger than the 

 following, and those between v and xiii are smaller and of about the same size. 



The clitellum occupies the same somites as in Deltania elegans, or from xiv 

 to xvii, with the two outside somites smaller than the central ones, llie body tapers 

 towards the tail end, the last somites being somewhat larger than the others and 

 rather obtuse. 



The color is pale flesh, with a darker, 3'eilowish clitellum. 'i'he whole body 

 is very transparent, just as the former species, but much less so than in the following. 

 It is a very tender worm indeed, and can only be brought home alive with great 

 care, as the least increase of temperature is apf to kill it. In no instance did I suc- 

 ceed in keeping it alive more than a couple of days. In this respect, however, all 

 the species of the genus are very much alike, and if there is any difference the larger 

 species is the most tender. 



t'^da: (tigs. 21, 24 and 30). The general arrangement of the setie is similar to 

 that of Deltania eleyau^, but the two inner setse are much less close together, in compari- 

 son with the two outer ones, than in the latter species, but not as close by one-Iialf as in 



