504 TRANSACTIONS OF SECTION D. 
the dermal armature, and the extremely thin and tragile, mostly carti- 
laginous, apparatus is rendered capable of giving origin to such powerful 
muscles as really are found here. 
The three anterior vertibree are immovably joined together, their neural 
arches being firmly bound by sutures with long dentations; besides, the 
two anterior are fixed to the expanded clavicle. The same immobility is 
found in Solenostomus without the clavicle here taking any share in the 
fixation. 
The vertebre bearing the interspinous bones for the dorsal fin are 
provided with secondary transverse processes close behind the primary ones ; 
thus the surface is enlarged, which gives attachment to the powerful muscles 
of the dorsal fin, the chief agent in swimming. The upper ends of the 
(bisegmented) interspinous bones bear flat expansions, on which the plates 
of the armature rest; through the small apertures left the tendons of 
the fin-muscles pass in a similar way as in the pectoral fin. As modified 
interspinous bones the nuchal plates may be regarded, a view which seems 
te be corroborated by the facts found in Aulostoma and F'istularia. Two 
nuchal plates are present in the Syngnathine group; a third is added 
behind these in the Hippocampine group; but the first, present in 
Hippocampus, the ‘Corona,’ and Solenognathus, is wanting in Gastero- 
tohcus and Phyllopteryz. 
2. Texas Fever in Cattle: its Cure by the Use of Drugs. 
By Dr. 8. Hapwen. 
3. Report on the Occupation of a Table at the Zoological Station, 
Naples.-—See Reports, p. 191. 
4, Report on the Index Animaliwm.—See Reports, p. 195. 
5. First Report on the Feeding Habits of British Birds. 
See Reports, p. 196. 
6. Report on Experiments in Inheritance.—See Reports, p. 195. 
7. Nineteenth Report on the Zoology of the Sandwich Islands. 
See Reports, p. 197. 
8. Interim Report on Zoology Organisation.—See Reports, p. 198. 
9. Report on the Occupation of a Table at the Marine Laboratory, 
Plymouth.—See Reports, p. 198. 
10, Interim Report on Experiments on the Development of the Frog. 
