262 



RECORD OF SCIENCE FOR 1887 AND 1888. 



Special Paleontology: 

 Invertebrates: 



Protozoa, Sponges, and Eo- 



zoon. 

 Corals. 

 Crinoids. 

 Molluscoida. 



Special Paleontology — Continued. 

 Mollusca. 

 Arthropoda. 

 Vertebrates. 

 Vegetal Paleontology. 

 List of abbreviations. 

 Bibliograpliy. 



This arrangement has been found necessary because the publications, 

 as before stated, are not capable of classification on purely biological 

 lines. So long as it is necessary for the paleontologist to report upon all 

 the collections obtained in the course of a reconnaissance, or during 

 the year's work of a geological survey, as means of defining the strati- 

 graphical divisions of geology, fossils of all kinds are liable to be con- 

 sidered in the same treatise, and it is only where specialists take up the 

 consideration of the fossils in their biological grouping, that we have a 

 literature differentiated in this way. Some works will be referred to 

 the biological sections which are not thorough treatises from the biolog- 

 ical point of view, while others are placed in the geological sections be- 

 cause the treatment is confined to the fossils of one system or to the 

 study of the characteristics of the fossils as tbey appear in some partic- 

 ular zone. 



THE CAMBRIAN. 



N. S. Shaler (236), and again in conjunction with August F. Foerste 

 (237), has discussed the geology and the fauna of the Cambrain district 

 of North Attleborough and Bristol County, Massachusetts. The fol- 

 lowing species are described as new : 



Obolellaf p. 27, pi. i, f.2. 



LamelUbranch f p. 28, pi. i, f. 5. 



Stenotheca curvirostra, p. 30, pi. i, f. 8. 



Phurotomaria {Baphisto7na) aitlehorensis.'p. 30, pi. ii, f. 11. 



Hyolithes qnadricosiaius, p. 31, pi. ii, f. 15. 



Salterella curratus, p. 34, pi. ii, f. 22. 



Microdiscus helli-marginatus, p. 35, pi. ii, f. 19. 



Paradoxidea walcotH, p. 3G, pi. ii, f. 12. Tlie antbor adds " Paradoxides tenelhie, 

 Billings, is in size like this species, but very distinct. It is interesting to 

 find a Paradoxides in tbe Olouellus Cambrian, since its occurrence there 

 diminishes tbe importance of the Paradoxides Cambrian as a Paradoxides 

 division." 



Ptychoparia vuicronatus, p. 37, pi. ii, f. 21. 



Ptychoparia atilelorensis, p. 39, pi. ii, f. 14. 



C. D. Walcott (258) discusses the age of the roofing slate of Gran- 

 ville, Washington County, New York. Tiie thin-bedded limestones, im- 

 bedded in the gray and purple slates of Middle Granville, have yielded 

 fossils which the author identifies with species of the Olenellus or Geor- 

 gian fauna of the Cambrian. The red slates, in a note, are said to be 

 of the Hudson Eiver formation. In a second paper (265) the same author 



