142 BULLETIN OF THE UNITED STATES PISH COMMISSION. 



6. C. Gegenbaur. Bemerkuugen iiber d. Milohdrusen-papillen d. 



Saugetheire. Jenaische Zeitschr., iii, 1873. 



7. 0. Creighton. On the development of the mamma and the mam- 



mary function. Journ. Auat. and Physiol., xi, 1877. 



8. H. Allen. Mammary glands of bats. Proc. Acad. Nat. Sci. Philad., 



1880, p. 133. 



9. G. Rein. Untersuchungen iiber die embryonale Entwickelungs- 



geschichte der Milchdriise. II. Arch. f. mik. Anat., xxi, 1882, 

 pp. 678-694. 



10. D. Barfurth. Zur Entwickelung der Milchdriise. Bonn, 1882. 



1 pi. 



11. A. Kolliker. Grundriss der Entwickelungsgesekichte des Men- 



schen und der hoheren Thiere. 2teAufl. Leipzig, 1884. (Milch- 

 driise, pp. 334-336.) 



12. William Turner. An account of the great tinner whale (Bala- 



noptera Sabbaldii) stranded at Lougniddry. Part I : " Soft 

 parts." Trans. Roy Soc. Edinburgh, xxvi, 1869-'72, pp. 197-251. 



29.-THE EFFECTS OF AN ELEVATED TEMPERATURE ON FISHES. 



By FRANCIS DAY. 



In a stream in the Government gardens at Ootacamund, on the Neil 

 gherry Hills, in Madras, in the middle of December, 1866, the average 

 maximum was 72°, the average minimum 50°, the highest point noted 

 72°, and the lowest 42°, and here Indian carp thrive. In the lake iu 

 that station, 7,600 feet above the sea, between May 20 and June 12, 

 1866, I found the water at 6 a. m. 67 £°, at midday 77°, at 4 p. m. 79°, 

 and at 6 p. m. 73°. In the Ooonoor Stream the water was from 3° to 

 6£° colder than in the Ooty Lake, while half way down to the low 

 country, at 4 p. m., it stood at 74°, and 6 p. m. at 75°. In the Bowauy 

 River, in the low country, a much higher temperature prevailed, at 6 

 a. m. it being 79°, at 12 a. m. 92°, at 4 p. m. 86°, and at 6 p. m. 82°. 

 But after the first burst of the monsoon the water may be roughly said 

 to have decreased about 10° in the Ooty Lake, 1° or 2° in Coouoor 

 River, rather more on a lower level, but from 10° to 13° in the Bowauy 

 River. All these localities being stocked with tish, it shows that they 

 must become accustomed to a heat which rises to as much as 92° at 

 midday iu the low-country river. 



In June, 1869, 1 took sixty -three observations in the Irrawaddi River, 

 iu British Burmah, the thennometer being immersed 1 foot below the 

 s urface, and the temperature recorded between 6 a. m. and 11 p. m 

 varied from 82° to $H°, while at the Een-gaygyee Lake, on June 18, the 

 water at 11 a. m. stood 90°. It is stated in Nature of February 12 that 

 the secretary to the National Fish Culture Association at South Ken- 



