ZOOLOGY. 427 



225 millimeters long ami 1.5 wide, and is destitute of suckers or hooks. 

 Its epidermis is coustituted by moderatelj' regular hexagonal and cili- 

 ated cells. The male is noteworthy in that it has numerous tes i(;les 

 and the penis ensheathed. The female has a double ovary and ps(Hido- 

 vitellogen, and a uterus as well as vagina. The pseudovitellogen is. 

 developed in the second third of the body, and is manifested in the iorm 

 of numerous ramified tubes, which, on each side, unite towards the 

 median line and debouch into the uterus ; the vagina open s far back on 

 the dorsal surface and extends forwards toward the u terns. The animal 

 thus distinguished has received the generic name Syndesmis. It agrees 

 with the Turbellarians in the ciliated epidermis, oral apparatus, male 

 organs, and the possession of two ovaries by the female, and with the 

 Trematods as to the vagina and disposition of the pseudovitellogen. 

 The peculiar combination of characters is deemed to authorize its erec- 

 tion into a special "suborder" of Turbellarians. (J. E. M. S., (2,) 11^ 

 pp. 192-193, from 0. E., XCIII, 1807-1809.) 



NEMATELMINTHES. 



Nematoda. 



Perroncito (E. ). Helmintliologiscbe Beobachtungen beziiglicli der unter den Arbeitem 

 am St. Gottbard-Tunnel aufgetretenen endemischen Kranklieit. In Molescliott'a 

 Untersuch. zur Naturlebre d. Menschen, v. 15, pp. 532-562. 



ANNELIDS. 



1. General. 



Kleinenberg (N.). SulF origine del sistema nervoso ceutrale degli Annelidi. Kela- 

 zione del Fr, Todaro. Atti Accad. Lincei, Transunti, v. 6, pp. 15-16. 



Verrill (A. E). New England Annelida. Part I. Historical Sketch, with Annotated 

 List of the Species hitherto recorded. Trans. Connecticut Acad. Sc, v. 4, pp. 285- 

 324. 



2. Special orders. 



Oligochceta. 



Eisen (Gustafjjj EcUpidrilidae and their Anatomy. A new family of the limicolid*. 



Oligochaeta. N. Acta. E. Soc. JJpsaliensts, 1881. (4to, 10. pp., 2 pi.) 

 Darwin (Charles). The Formation of Vegetable Mould, through the action of Worms,. 



with observations on their habits. With illustrations. London, J. Murray, 1881. 



(r2mo, vii, 326 pp.) 



Polychata. 



Eietsch(Max). Organization of Sternaspis scutata. Abstr. Journ. Boy Microscop. Soc, 



C2,)v.l, pp. 601-602. 

 Vejdovsky (Frz.). Untersuchungen iiber die Anatomie, Physiologie uud Entwicke- 



luug von Sternaspis. Abhandl. Akad. Wiss. Wien, v. 43. 



A Parasitic Polychivtous Worm. 



It is a rule that tlie Polychicta, the order represented by the great 

 majority of the common marine annelids, lead a free life. It is a rule 



