CALIFORNIA EUDRILID/E. 33 



Deltania Troyeri. 

 Figs. 21 to 39. 



Deltania Trmji>rt Eispn. Zoc, iv, 2")!, October, 1893. 



Size al)Out 1^ inch !)>' h line. Septal glands comparatively large, the one in 

 vi the largest. One pair ot large, opaque .spermatheea, furnished with one pair of 

 diverticula, which are about ^ or more longer than the spermatheea proper. Sperm- 

 sacs in X and xi, not lobcd. One developed seta in each sac of penial seta\ Pros- 

 tate is tubular, not helix-like, with the top either straight or bent at right angle, pro- 

 jecting backward. The exterior penial papilhv not as prominent as in the preced- 

 ing species. The inner couples of seta? are further apart than in the following species. 



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

 Troyer, of San Francisco 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. As the soil dried up the worms disappeared. 

 The worm is very scarce at any time, and not one s|)ecim('n is found to every hun- 

 dred of Deltania elegana. 



Exterior characteristics. Exteriorly this species is characterized at once from 

 Deltania elegans by being very much smaller, as much so as an Enchytrteus is 

 smaller than an average medium-sized Lurabricus. 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 cliteilum 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 proportions 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 cliteilum occupies the same somites as in Deltania elegans, or from xiv 

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

 tovvardstheta.il end, the last somites being somewhat larger than the others and 

 rather obtuse. 



The color is pale flesh, with a darker, yellowish cliteilum. The whole body 

 is very transjiarent, 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 ap": 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. 



Seta^. (figs. 21, 24 and 39). The general arrangement of the setaj is similar to 

 that of Deltania elegans, but the two inner setie are much less close together, in compari- 

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



