1. On the Anatomy of Sutroa rostrata, a Xew Annelid of tiiic Family of 



lumbriculina. 



B)^ (jUSTAV ElSEN. 



The oligoclui'tous uiiiielid, which is tlie subject of this muiiogriiph, was hrst 

 I'ouuil by me some ten years ago in the small body of water known as Mountain 

 Lake, situated close to the ^larine Hospital, on the Reservation west of San 

 Francisco, California. During a recent visit to the same locality, in May, 1887, 

 1 found tlie same worm in exactly the same part of the ];ike, but, as before, 

 in very few specimens. Perceiving the necessity of creating a new genus foi- this 

 oligochtete, I have done myself the honor to dedicate the same to Mr. Adolph 

 Sutro, whose magnihcent public scientific library, marine aquarium and zoological 

 station on the Pacific Coast will in the near future become one of the most promi- 

 nent and valuable institutions of learning in this country. 



OLIGOCH^TA. 



Fuiiiily. Lumbriculidae. 



A. Sub fiiiuily Tmchodrilina Vejd. 



No solitary- albuminous gland opening on the ventral side of tlie body. 



B :Sul) family Lumbeicolina Vejd. 



A solitary albuminous uland opening on the ventral side of one of the ante- 

 rior segments. (Jf this sub-fauiily three genera are now known: 



1. Lumbriculus (jiulic 



Foui' paii-s of s(Mninal receptacles in segments 8, 10, 11 and 12. A solitary 

 albuminous gland in the ninth segment. The free secondary pei'igastric vessels 

 begin in the thirteenth segment, and are all pulsating. The [)i'ese[)tnl secondary 

 vessels not branching, the postseptal one branching. Spines not distinct!}- forked.* 

 Cephalic lobe not filifoi-m. 



"Vejilov-ky, System, etc., <ler Olig c'aaeten, Pmgue, 18-i4, pag. 52. 

 Mkm. Vol. II. i. .Lauiwrv, I«68. 



