414 . Scientific Intelligence. 



massive granular rocks comprise several varieties of shonkinite, 

 which, as pointed out by the author, are remarkably similar to 

 the Montana types both chemically and mineralogically. We 

 append the results of the analyses of the various rocks. 



Si0 2 A1 2 3 Fe 2 3 FeO MgO CaO Ma 2 K 2 H 2 Ti0 2 P 2 5 Total. 



] 



47-65 



19-32 



3-93 



4-92 



3-90 



6-15 



3-58 



4-61 



5-15 



0-75 



1-23 



101-19 



2 



57-15 



19-13 



3-24 



2-04 



2-25 



2-90 



4-15 



7-05 



1-57 



0-38 



0-38 



100-19 



3 



61-45 



19-64 



2-19 



0-22 



1-00 



0-60 



4-10 



7-58 



2-37 



0-40 



._„ 



99-55 



4 



58-00 



22-52 



1-37 



1-01 



0-85 



0-90 



6-93 



7-72 



1-71 



0-19 



.__ 



101-20 



5 



61-15 



22-07 



1-05 



1-02 



0-40 



075 



5-86 



7-01 



0-71 



0-20 



.__ 



100-22 



6 



55-52 



20-05 



2-52 



"2-40 



2-10 



3-15 



3-44 



7-49 



1-42 



0-70 



0-51 



99-30 



7 



48-05 



13-94 



2-67 



5-98 



7-81 



7-25 



2-72 



6-56 



1-66 



1-10 



1-15 



98-89 



8 



50-15 



15-86 



2-44 



5-39 



5-30 



8-40 



4-13 



5-00 



1-50 



1-00 



0-86 



100-03 



9 



52-80 



19-99 



3-63 



3-40 



3-20 



4-22 



3-10 



7-74 



1-18 



1-00 



0-70 



100-96 



1, " Trachydolerite " from Kau, 8 kil. N. of Maros Peak. 2, 

 " Vitrophyric trachydolerite." Bowlder 3 kil. N. of Maros Peak. 

 3, "Trachyte " (Ponza type), bowlder in brook of Gentungan, 5 

 kil. S. W. of Maros Peak. 4, " Phonolite " Top of Maros Peak. 

 5, "Bostonite" bowlder in brook at Gentungan. 6, " Gauteite " 

 bowlder at Gentungan. 7 and 8, "Shonkinite" same loc. 9, 

 " Shonkinite with syenitic habit." Same loc. Above analyses 

 by Dr. Hinden. 



In addition bostonite-phonolite breccias and trachytic tuff or 

 trass are mentioned. A more complete description of this inter- 

 esting series is promised in the future. l. v. p. 



5. Notes on Corals of the genus Acropora {Madrepora Lam.) 

 with new Descriptions and Figures of Types, and of several New 

 Species ; by A. E. Verrill. Trans. Conn. Acad., vol. xi, pp. 

 207-267, 7 plates, January, 1902. — This memoir includes a 

 revised list of about 120 species studied by the author, with their 

 distribution, and very detailed descriptions and figures of a con- 

 siderable number of the original type specimens of species for- 

 merly described by Dana and the author, and of several new 

 species. The figures are excellent reproductions of photographs, 

 most of them considerably enlarged to show the details of struc- 

 ture. 



6. A Course in Invertebrate Zoology. A Guide to the Dissec- 

 tion and Comparative Study. of Invertebrate Animals ; by Henry 

 Sherring Pratt, Ph.D. xii and 1 20 pages. (Ginn & Company.) — 

 A glance at the preface shows that the author's ideas as to what 

 such a laboratory guide should be have arisen from practical 

 experience in teaching, and an examination of the body of the 

 work convinces one that these ideas have been admirably carried 

 out. The directions for the dissection of each of the thirty-four 

 types are so complete and independent that shorter or longer 

 courses can be planned, the forms taken up in any desired order 

 and the microscope used or not as is convenient. Almost the 

 entire attention is given to directing the student in his work, and 

 statements which can be made by the teacher to the class as a 



