170 CAMFOKNIA ACAUEMY OF SCIENCES. 



EXTERNAL CllAKAfTEK.S. 



I'lic variety resembles the main form in most respects, but is mucb larger, 

 especially thicker. The contracted specimens were as long as tiie longest of the main 

 form from San Francisco, when fully extended, and twice as thick, and must, when 

 alive, have measured 4") mm. by 2i mm. Other external characters agreed exactlv 

 with those of DtUania Tioijeii type from San Francisco, California. The deltoid 

 arrangement of the ventral .setse in the genital region was identical, which satisfies me 

 that we in (liis ;ii langement have most important species characters between the 

 species of this genus. 



INTERNAL CHARACTERS. 



The variety differs from the type in two particular ))oint<. 



The xepta! r/l'inJs are present only in two somites, v and vi.and are exceedinglv 

 thill, or about one-fourth as thick as those of D. Troijerl type. This refers to those 

 superior to the intestine. Those below the intestine I could not discern, as no sections 

 were made. The glands were lamellae-like, and only about twice as thick as the 

 septum. 



The siicrnidthecd' were thicker than those of the type, with more inllateil diver- 

 ticula. 



The jiroatnfe was thick, and its glandular part about I5 times longer than the 

 very thin muscular duct. Two or three fully developed penial sette with each 

 prostate. 



Deltania Troyeri Eisen, 11. var. lagunse. 



Figs. 144-147. 



Definition. Size S£ mm. b;/ I 1-.' mm. No rnpitlnfori/ j)nj)ii'lii-. Seta a and 

 I) ne.d poiilerlor to clUellnm, reach the'w jliuiJ didance in the fifth somite posterior to clitel- 

 lum. Spermathecf.e in ii; tivice as larye as those of the type, contracted at center, apical 

 part swollen. Prostates more slender than in the type. Large ovisacs. Habitat, Baja 

 California, Sierra hiunuia. 



DETAILED DESCRIPTION. 



Ilabitiit. The exact locality in the Cape Region of Baja California and Sierra 

 Tjaguna is a camping-plaeo called La Jovii. There, where the trail crosses the creek 

 the water had backed up behind some fallen logs causing a miniature mudllat covered 

 with leaves and sediment. The specimens were found in the rotten wood and under 

 the decayed leaves in the mud. Altitude about 5500 feet. 



EXTERIOR CHARACTERS. 



The average specimen is larger than the type from San I'laiuisen, the largest 

 specimen of the latter being smaller than the average maturi' specimens of the 

 variety lag ana . The two round copulalory pali)illa' ligurcd by me from l>. Tmyeri 

 are not seen in the variety, 'i'he sacs of penial setic in several dissected specimens 

 po.ssessed each two penial set.e fully developed, one having three, but of which one 



