98 PHYSIOLOGICAL SERIES. 



the description of the previous specimen, but with greater 

 clearness. The pedicle of the pituitary body is nearly 

 20 mm. long. 0. C. 1308 M. 



D. 102. The brain of a Gurnard (Trigla hirundo) exposed in 

 from abovo. Tho olfactory bulbs are of some size ; 

 they are sessile on the cerebrum, and each gives origin to a 

 -tout olfactory nerve. The basal ganglia are globular, 

 smooth, and very large ; the optic lobes are also well 

 developed and somewhat flattened antero-posteriorly. The 

 small cerebellum projects slightly backwards ; it has 

 prominent crura. The medulla is short, with well marked 

 vagal lobes on either side of the rhomboid fossa. The 

 anterior part of the cord is much thickened, and shows 

 upon its dorsal surface a series of 5 pairs of metameric 

 enlargements, which are fully described in the section 

 devoted to the spinal cord. 0. C. 1308 H. 



D. 103. A young Lump-Fish (Cyclopterus lumpus), 3*5 cm. long, 

 with the brain and spinal cord exposed from above. The 

 l>r:iin is similar in all essentials to that of the adult, but is 

 shorter and broader in outline, larger relatively to the size 

 of the body, and more nearly fills the cranial cavity. The 

 latter feature is common to the young of many Teleosts. 



0. C. 1308 L a. 



D. 104. The head of a Lump-Fish (Cyclopterus lumpus) with the 

 brain exposed from the dorsal and ventral aspects. The 

 I. rain is poorly developed in every part. The minute 

 olfactory bulbs are sessile upon the cerebrum. The optic 

 lobes are oval in outline, and, although they form the 

 largest region of the brain, are very small in comparison 

 with those of most other Teleosteans. The cerebellum 

 lianas backwards over the front part of the rhomboid fossa; 

 it is oval, quite >mall, and without prominent crura. The 

 medulla i- remarkably long and narrow, and merges 

 gradually into the cord much as in the lower Sharks. 

 It shows no definite suporlieial cminenees, and no doubt 

 owes its simple unmodified character to the peculiarly 

 feeble development of the cranial nerve-. 



Presented by W. B. Tegetmeier, 



