112 BibliograpMcal Notices. 



the study of tins organ than the Callidina parasitica, Gigl., 

 previously investigated by me. I can now, therefore, in this 

 point fully confirm the descriptions of the germi-vitelligene 

 since given by Tessin (Zeitschr. f. wiss. Zool. Bd. xliv. 

 pp. 273 etseqq,) and Zelinka [ibid. pp. 396 et seqq.). 



EXPLANATION OF PLATE VI. 



All the figures relate to Paraseison asplanchims, aud tlie letters have 

 the following signification : — 



a. Aperture of the sexual organs. ce. CEsophagus. 



(7. ej. Ductus ejaculatorius. ov. Ovary. 



dr. Glands of the head and neck. st. Stomach. 



cU. Dorsal feeler. t. Buccal feelers. 



du. EflTerent duct of the female te. Testes. 



sexual organs. v.d. Vas deferens, 



f. Pedal glands. 2V(/. Aquiferous vessel. 



^' TV / i ' ■ > Doubtful organs. 



m. M uscle. ?/. j =■ 



7)1(1. Masticatory apparatus. ~. Flicker-organs. 



0. Buccal aperture, 



Fiff. 1. Female animal, x 230. 



Fiff. 2. Neck, x 275. 



Fi(/. 3.* Section through the cuticle of the trunk. 



F/ff. 4.* LLinder extremity of the tail. 



Fiff. 5.* Anterior end of the head, seen in front. 



Fiff. 6. Head, X 550. 



Fiff. 7.* Tail._ 



Fiff. 8.* Masticatory apparatus seen from the side. 



Fiff. 9.* Masticatory apparatus seen from below. 



Fiff. 10. Deposited ova, x 120. 



Fiff. 11. Spermatopliore after treatment with solution of potash. 



Fiff. 12. Spermatophore in the natural state. 



Fiff. 13, Trunk of tlie male, X 275. 



The figures marked with an asterisk have no indication of the 

 amount of enlargement. 



BIBLIOGEAPHICAL NOTICES. 



A Flora of Hertfordsliire. By the late A. E. Prtoe, B,A,, F.L.S. 

 Edited for the Hertfordshire Natural History Society by Benjamin 

 Daydon Jackson, Sec. L. S. With an Introduction on the Geology, 

 Climate, Botanical History, Sfc. of the County, by John Hopkinson, 

 F.L.S,, F,G.S,, and the Editoe. London : Gurney and Jackson, 

 1887. Svo, pp. viii & 588. 



To edit a botanical work by one like the late Mr. Pryor, whose 

 work we have been led to expect would at least equal, if not 



