334 JAMES EDWARD ACKERT 



4. Two types of special sensoiy end-organs are found in the 

 skin : (1) A small elongate end-bulb into which a single meduUated 

 nerve fiber enters, passes approximately to the opposite end, and 

 terminates in a slight enlargement; (2) A large, round, cellular 

 terminal corpuscle innervated by a single fiber whose branches 

 disappear among the cells of the organ. 



5. Terminal varicosities are abundant in the region of the hairs 

 outside of the sheaths of the follicles. 



6. In the skin of the face, especially, striated muscles are well 

 developed. Motor end-plates occur on these muscles. In the 

 integument the end-plates appear to be beneath the sarcolemma, 

 and in the muscles of the tongue these plates are clearly below the 

 sarcolemma. 



7. Small fibers resembling sympathetic post-ganglionicneurites 

 extend hoop-like around the large modified sweat glands external 

 to the longitudinally arranged smooth muscle fibers. 



8. Blinded bats, when on the wing, probably perceive obstacles 

 through the sense of touch by the effect of condensations of the 

 atmosphere (produced on approaching the object) upon the free 

 nerve terminations in the epidermis and the superficial nerve 

 rings of the hair follicles. 



BIBLIOGRAPHY 



Allen, H. 1893 A monograph of the bats of North America. Bull. U. S. Nat. 



Mus., no. 43. 

 Arnstein, C. 1876 Die Nervender behaarten Haut. Sitzungsber. d. k. Akadem. 



d. Wissensch., Abt. Heft Separat, pp. 203-232. 

 Beil 1871 Ueber die Nervenendigungen in den Haarbiilgen einiger Tasthaare. 



Inaugur. Dissert., Gott. 

 Boeke, J. 1909 Die motorische Endplatte bei den hoheren Vertebraten, ihre 



Entwickelung, Form und Zusammenhang mit der Muskelfaser. Anat. 



Anz., Bd. 35, pp. 193-226. 

 Boll, F. and Schobl, J. 1871 Die Flughaut der Fledermause namentlich 



Endigung ihrer Nerven. Centralblatt f. d. med. Wissensch. 

 Bonnet, R. 1878 Studien i'lber der Innervation der Haarbalge der Hausthiere. 



Alorph. Jahrb., Bd. 4, pp. 329-398. 

 BoTEZAT, E. 1908 Die Nerven der Epidermis. Anat. Anz., Bd. 33, j)p. 45-75. 

 CoHMiKLM, J. 1867 Ueber die Endigung der sensiblen Nerven in der Horn- 



haut. Archiv f. path. Anat., Berlin, Bd. 38. 

 Diem, Fh. 1907 Beitrage zur Entwicklung der Schweissdriisen an der behaarten 



Haut der Saugethiore. Anat. Hefte, Abt. 1, Bd. 34, pj). 189-236. 



