94 Bushnan on Animals found in the Blood. 



out, teems with facts, comparisons, contrasts, arguments, de- 

 ductions, and information ; with, here and there, discursive 

 notices in illustration, written playfully and pleasingly, in 

 agreeable relief to the severer, that is, more strictly technical, 

 nature of the thesis. Would we had volumes full of such 

 notices on insects as that supplied on the dragon fly in p. 67. 

 The end for which Mr. Newman labours is the establishment 

 of a uniform nomenclature of the parts of insects ; for, until 

 we can speak of the various parts of insects in common terms, 

 a reciprocal communication of ideas between those who study 

 insects (and every one who loves nature must) cannot take 

 place. We wish his amiably intended, and, we believe, ex- 

 cellently executed, labours all regard, and cordially commend 

 them, and the nomenclature he has proposed for the parts of 

 the head of insects, to the analytical examination of every 

 entomologist. — Vll. Essay on the Classification of parasitic 

 Hymenoptera ; by A. H. Haliday, Esq. M. A. — VIII. Va- 

 rieties. Among the contributors of the communications under 

 this head are, Messrs. Swainson, Westwood, Babington, 

 Cooper, Denny, Wood, Walker, and others. 



Bushnan^ J. Stevenson, F. L. S., Surgeon to the Dumfries 

 Dispensary, &c. : the History of a Case in which Animals 

 were found in Blood drawn from the Veins of a Boy, with 

 Remarks. 8vo, 74 pages ; I plate, exhibiting the one 

 species of animal found, of the natural size and magni- 

 fied, both coloured. Highley, Fleet Street, London, 1833. 

 The history of the particular case which led to the pro- 

 duction of the book is of less interest than the remainder of 

 the book's contents. The author has passed in review, and 

 taken the essence of the evidence supplied by, every author 

 who, from the earliest records till now, has written on, or in 

 any way mentioned cases of, the occurrence of entozoa and 

 other animals within the veins, arteries, heart, stomach and 

 intestines, uriniferous organs, &c., skin, &c. ; and his book is 

 valuable, were it only as supplying a concise and essential 

 abstract of the facts on this subject, which are scattered up 

 and down in numerous and expensive books on medicine. 



The history of the recent case, and the abstract of the 

 previously recorded ones, occupy 40 pages. Pages 41. to 

 74. are occupied with a review of the " very different 

 opinions which have at different times been entertained with 

 respect to the origin of the proper entozoa of the human 

 body," and with the author's own opinion on the subject. 

 He arranges the opinions which have prevailed, according to 

 the principle they involve, and makes five of them ; and pro- 



