PACIFIC COAST OLIGOCHJiTA. 169 



My object is merely to call attention to this form which after all may be more distinct 

 as more of its structure is known. In regards to the form of the spermathecfe it 

 differs much more from Sp. Benhnmi than does the other subspecies Sj). gutitemalensis. 

 It is also much smaller. 



CHARACTERISTICS. 



Coin) is much liohter, more flesh and less violet than that of Sp. Benhami and 

 Sj). guatemaknus, and the irridescence more faint. The species is smaller than 

 Sp. Benhnmi, being al)Out 9 cm., about one-half the size of that species. 



Clitellum in the most developed specimen occupied xv-xxiv ventrally, dorsally 

 it could not be properly defined. Prostates present with certainty in xxiii, xxiv, but 

 owing to the somites being torn in xxv, xxvi I could not with certainty ascertain their 

 presence there. 



SeUe are similar to those in Sp. Benhami. The anterior xxii somites have 

 much larger setie than the other, except the most posterior ten. The setae increase 

 in size from somite ii to somite xv, then diminish backwards to xxiii, in which somite 

 they are smaller yet, this size continuing to the tail, where at about ten somites from 

 the anus the setae again begin to increase. There is no parietal gland in somite 

 iii as in Sp. Mseni, and this is the chief reason why I class this species under Sp. 

 Benhami. The spermathecce are in three pairs and open in front of 3 and 4 dorsally. 

 Their shape resembles much more those of Sp. Eiseid than they do those of Sp. 

 Benhami. The apical end is globular and very much larger than the basal part. 

 The spermathecae are not trowel-like. T give some outline drawings of the sperm- 

 atheca? taken from one and the same individual. 



Sperm-sacs are very large in xi, xii, the one in xxii projecting into xxiii filling 

 the somite also. The sperm-sacs are coarsely lobulate, much less so than in Sp. Mseni. 



The cnpillaries resulting from the lateral integumental vessels are very large 

 in the anterior six somites. The hearts also are very large and seem to fill all available 

 space on the crelomic cavity in viii, ix, x, xi. 



Deltania Troyeri Eisen, n. var. crassa. 

 Figs. 142, 143. 



Definition. Size 45 mm. hij 2 1-3 mm. Septal glands in v and vi, about twice 

 as thick as the septum. SpermatlLccm each with two diverticles, ichich have the apical 

 ends globular and inflated. Prostates thick, ivith the glandular j^art about 1 1-2 times 

 longer than the thin muscular duct. Habitat, Baja California. 



In other respects like the type, judging from two dissected specimens. 



Habitat. Of this variety I possess only three specimens, from Eusenada de 

 Todos Santos, in the northern part of Baja California, on the Pacific Coast side. They 

 were taken in the same locality as Aleodrilus Keyesi, in the pure sand in the creek 

 bottom, in a spot which had been kept moist by the accumulation of some sacks and 

 rubbish. The specimens became strongly contracted, on account of the necessity of 

 immediately placing them in alcohol. 



