olO NOTES AND EXHIBITS. 



second with the flexor perforatum primus tertii digiti, and the third 

 with the flexor perforates quarti digiti. 



4. — The tendon of the flexor prof undus digitorum is united for a 

 short distance in the sole, by means of tendinous fibres, with that 

 of the flexor longus hallucis. 



5. — A small muscle representing the lumlricales of mammals 

 takes origin from the under surface of the tendons of the flexor 

 profundus near the point where they separate, and divides 

 anteriorly into two pointed processes, which become inserted into 

 the proximal end of the cartilaginous sheath containing the flexor 

 tendons of the second and third toes. This muscle seems to have 

 hitherto escaped the notice of anatomists ; so far as I have been 

 able to ascertain it is peculiar to the Pigeons. 



To sum up, the following are the points in the myology of the 

 Columlidce which seem to be specially characteristic of the 

 family : — 



1. The absence of a posterior belly of the latissimus dorsi. 



2. The expanded form of the tensor accessories. 



3. The absence of the gluteus externus and the presence of the 

 adductores hrevis et longus, the semitendinosus and semimembranosus. 



4. The special relation of the tendon of the ambiens (when 

 present) to the fibular head of the flexor perforatus secundus tertii 

 digiti. 



5. The presence of lumlricales in the foot. 



notes and exhibits. 



On Euktiminaria ducalis. 



By the Eev. J. E. Tenison-Woods, F.G.S., F.L.S. 



In the Proceedings of this Society last year, I described (Vol. 



III., p. 126) what I considered to be a new genus of Polyzoa 



under the above name. I mentioned that similar fossils had been 



found in the chalk, and that M. d'Orbigny had suggested that 



