Miscellaneous Intelligence. 443 



20. Die Organisation der Turbellaria Acoela, von Dr. Ludwig 

 a^on Graff, Professor of Zoology and Comparative Anatomy in 

 the University of Gratz. 90 pp. quarto. Leipsic, 1891 (Wilhelm 

 Eno-elmann). — This work is an elaborate memoir on the Accelous 

 Turbellarian worms. It is illustrated by ten plates, exhibiting 

 their microscopic structure as presented in different species of the 

 genera Amphichoerus, Convoluta, Aphanostoma, Monoporus and 

 Proporus. An especially interesting part of the volume is a sup- 

 plement, on the structure and purpose of the chlorophyll cells of 

 Convoluta JRoscoffensis, by Dr. G. Haberlandt, Professor of 

 Botany in the same university. 



III. Miscellaneous Scientific Intelligence. 



1. Note on the recent eruption of Iiilauea, Hawaii. — A letter, 

 from Rev. E. P. Baker, of Hilo, dated March 8th, states the 

 following facts : 



The eruption, or discharge of Halemaumau, mentioned on page 

 336, occurred on the 6th of March — the very same day of the 

 year with that of 1886, making the interval just five years, and 

 adding another to the number of Spring or wet-month eruptions. 

 The lava ran out by some subterranean channel, at a slower rate 

 than in 1886, a little of it still remaining on the 7th. The whole 

 area gradually subsided and in two or three days, the cone had 

 sunk out of sight, leaving in its place a crater-like cavity about 

 as deep as that of 1886 [900 feet]. This crater has a talus half- 

 way up from the bottom, making it conical below, and a sheer 

 precipice above ; and avalanches from the precipice continue to 

 add to the talus. The diameters of the crater are by estimate 

 three-fourths and half a mile. 



There were earthquakes in Hilo for a week or so after the 6th 

 of March, and many also in Kapapala, 15 miles to the southwest 

 of Kilauea, but all were light. It is inferred that the lava ran 

 out under ground, in the direction of the discharge of 1823. As 

 in ] 886, none appeared above ground. [The cone that was so 

 deeply buried at the eruption was the " debris-cone," whose 

 condition for 188*7-1888 is represented on plates in Vol. xxxv 

 of this Journal, and also in the writer's work on Volcanoes. It 

 was early described by F. S. Dodge as resting on the liquid lava; 

 and to this its whole history, and the final event of its burial, 

 attest. j. d. d. 



2. Depths of 3000 fathoms and more in the Indian Ocean. — 

 An area having depths of 3000 fathoms and more exists off the 

 Northwest coast of Australia. In addition to earlier observa- 

 tions between meridians of 100° and 106° E., and parallels of 18° 

 and 25° S. new results were obtained in 1888 by the Eastern 

 Telegraph Co.'s steamship "Recorder," under Capt. C. O. Madge. 

 The depths found were from 3015 to 3393 fathoms, between the 

 latitudes 13° 40' and 11° 22', and the meridians 118° 42' and 116° 



