94 QUARTERLY CHRONICLE. 



and the three parts — respectively cone points, cone bodies, 

 and cone tails. He says that Max Schultze and Hasse have 

 only distinguished an outer and an inner division of the cone, 

 but that Max Scliultze^s "lens-like body^^ corresponds to 

 his " cone-bod3^" After some further remarks on the signi- 

 ficance of these parts, Dr. Steinlin alludes to the observation 

 made by Max Schultze, that the " cone-points" are striated, 

 and states that he has often seen this himself, but did not 

 regard it as a normal structure. He noAV, however, compares 

 it to the structure found in the cones of the eyes of Crustacea. 

 He particularly describes the case of Squilla, in which he 

 found the striated portion breaking vip into series of four 

 small laminaj, or plates transversely. Professor Max Schultze, 

 in his remarks upon Dr. Steinlin's paper, points out what he 

 considers the errors in that communication. He regards the 

 columnar elements of the retina as differing in this, that 

 whereas the rods have their outer division (" point ^^ of 

 Steinlin) of a cylindrical shape, the cones have that division 

 of a conical shape. The distinction does not rest at all in 

 the presence or absence of a lens-shaped body (the third 

 division of Steinlin), but in this difference of form. The 

 rods are the fundamental organs of vision, to which the cones 

 are in certain cases superadded. As to the lamination of the 

 cone in Crustacea, Professor Schultze is very glad to be con- 

 firmed by Dr. Steinlin's observations. He has himself 

 recently published a separate work on this subject, Avhich we 

 notice elsewhere. On other points on which Dr. Steinlin 

 propounds new vicAvs, such as the connection of the nervous 

 elements and the connective tissue. Professor Schultze simply 

 expresses his complete disagreement. 



" 071 the Furkinjian Fibres," by Dr. Max Lehnert. 



These fibres were discovered in 1845, by Purkinje, beneath 

 the endocardium of the sheep, ox, pig, and deer. They have 

 since been written on by Kolliker, von Hessling, Reichert, 

 Remak, Acby, and others. They appear to consist princi- 

 pally of striped muscular tissue disposed in a very remarkable 

 way with connective tissue. They are described at great 

 length in this paper, and figured in a large plate. 



" On the Siructii7'e of the Spinal Ganglia, with Remarks on 

 the Sympathetic Ganglio7i-celtsj" by Dr. O. Schwalbe. 



This appears to be a valuable paper; it is of considerable 

 length, and Avell illustrated. The auilior has used iodine- 

 serum largely in his observations. 



''Researches on the Tooth-palp,^' by Franz Boll. — This 

 paper is by a medical student of Bonn — one of Prof. Max 

 Schultze's pupils. The points to w''ich he has directed his 



