Bulletin 30 - 436 



Glycimeris acuticostata Sby. Echinochatna antiquata yaquensis, 



Pecten eugrammatus Dall. n. var. 



Spondylus bostrychites Gpy. Cardium Cinderella?, n. sp. 



Venericardia islahipaniolse, n. sp. Protocardia islahispaniolee, n. sp. 

 Antigona Blandiana Gp}^. . 



Affinties of the Zone B. Fauna. — Of the above 41 per cent 

 occur in Bluff r, 33 at Bowden, 10 in I, 10 in H. The reciprocal 

 percentages are 19 to A, 10 to 1, 1.6 to Bowden, .7 to G, .6 to I, 

 .5 to H. 



Fauna of Zone C. — Fossils were scarce in the glauconitic- 

 like, bluish-green clays alternating with limestone which consti- 

 tuted this zone. Casts of Pecten and Conus were found but the 

 only identifiable molluscan species was Cassis sulci f era, which 

 ranges throughout our sections. Zone C is chiefly of interest as 

 being the probable horizon of two sea urchins which were found 

 loose. It is much to be regretted they were not in situ, since they 

 suggest a Helvetian horizon. 



Evidence of the Echinoderms. — Dr. Jackson has been so kind 

 as to examine the Zone C sea urchins. They are the young and 

 adult of the same species. He says of this Clypeaster in a letter 

 dated April 27 : "The Clypeaster caudatus, I should think from its 

 comparion with other species was Miocene and I don't think 

 there are any specimens in the other West Indian material that 

 can be referred to the species. When I go down I will look 

 closely and see if I can give you further clues to other West In- 

 dian forms." 



In a later letter Dr. Jackson remarks : "I have been to Bos- 

 ton and went over the material carefully. The only specimens 

 of Clypeaster caudatus, sp. nov. are those in Miss Maury's collec- 

 tion from Santo Domingo. The species makes perhaps closest 

 approach to Clypeaster lanceolatus Cotteau which he described 

 from Cuba and which I included (with photographs) from the 

 Panama Canal Zone." 



I may add regarding Echinoderms that Senor Rodolfo Cam- 

 biarso of Santo Domingo City most kindly presented me with a 



