CALIFOKNIA KUnHIIJn.K. 30 



the species. Tiicic m-v Umv \k\\v of septal <;laii(l.s in v, vi, vii and viii. The inlands, 

 an far as I t-an iu(l"e from dissections only, arc of ahnosl (Miual size, sonicwhal lonirei' 

 there than in Dc/findu Troijcri. They arc ('(pially (h'vclopcd on the lower and nppcr 

 side of the (cso])liagns. The alimentary canal olfcis no great peculiarities. The 

 sj)ecimens were all very nuicli stretched, ami I am not certain if the form of the 

 oesophagus will prove constant. Howevt'r, the contractions at the septa were much 

 smaller than in any other species. The (esophagus from somite ix narrowed down 

 fowartl somite xii, here it began to gradually increase in width, hut the sacculated 

 intestine begins evidently lirst in xvii, increasing in width gradually baclvwarils until 

 it reaches the region between xxvii and xxxv, where it suddenly narrows und con- 

 tinues as nai'row to the end of the bod}'. 



Spennathecn (figs. 42 and 4o). There is one pair in ix, opening between viii 

 and ix, of the same general appearance as in DaltaHla Troyeri with minor character- 

 istic details. The main sac is ovoid and somewhat lunate, pointed, with very smooth 

 outline and with no trace of warty excrescences. Theie are two diverticula allixed 

 halfway between the base and the glandular part. They are much smaller than 

 those of Deltania Trorjeri, being less than one-third as long as the main sperraatheca, 

 while in Deltania I'voyeri the diverticula are one-half or more as long as the main 

 spermatheca, and affixed to the muscular part close to the base. The spermathecae 

 open in front of the 1st setse and .are situated much closer together than those in 

 D. Troyeri. The opaqueness of the sperraatheca is the same as in the latter species. 

 There is, however, a decided diflference in the location of the spermatheca. In 

 D. Troyeri they are situated so far apart that they do not touch the ventral ganglion. 

 In D. Benluuiu, however, they crowd it, this a[)proach being caused partly by the 

 closer proximity of the ventral or inner couple of setfe, partly by the situation of the 

 spermathecal pores which in our present form are more ventral to the set;c. 



I'he sperm-sacs (fig. 41) are of a very characteristic form. They are larger in 

 proportion than those of D.eleyans, hut not quite as large as in JD. Troyeri. There are 

 two pair, one each in ix and xii, and they do not connect with each other. 

 Each one consists of a very large flesh-like lobe, at the base of which are seen half :: 



a 



dozen smaller and globular sacs, all connected at the place of adherence to the an- 

 terior septum. These different lobes, the lai'ge one as well as the small ones, are 

 full of rounded, oblong or irregular spermatophoric sphscrules. The sperm-sacs do not 

 by far fill the somites. The form of the sj)erm-sacs varies to some extent, but the 

 main character is the same in all, a large, rounded or flask-like lobe, at the base of 

 which are several smaller ones. 



Spermdud and filiated rosettes as in D. Troyeri. The prostate offers the char- 

 acteristic of having the lower part of the glandular sac considerably swollen, conical 

 and gradually diminishing in size towards the apex, which again is slightly enlarged 

 like a knob. There is only one long slightly bent or almost straight seta in each of 

 the penial seta-sacs, both setse opening on a small papilla, and which as far as I can 

 see more resembles that of D. Troyeri than D. eteya.ns. The blood is very pale yellow, 

 paler even than in the other species. There are three strongly pulsating hearts in 



