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SMITHSONIAN MISCELLANEOUS COLLECTIONS 



[VOL. 47 



Basal pectinirhomb and that on plates 12 and 18, each with about 

 75 dicltopores, and that on plates 14 and 15 with about 110. 



Madreporite large and 

 the hydropore immediately 

 in front of it somewhat 

 larger than in Pseudocri- 

 nitcs. Both are situated on 

 plate 23. 



Anal pyramid composed 

 of 7 pieces, and surrounded 

 by another circle of larger 

 pieces of which there mi- 

 pear to be 7 or 8. The 

 anal area lies between 



Fig. 34. 



-Analysis of Trimerocystis peculiaris 

 n. sp. 



plates 7, 8, 13, and 14. 



Column very stout. Length unknown. 



Formation and locality. — From bed 4 (see page 203) of the Manlius 

 formation in the Keyser quarries, associated with Camarocruuis, 

 Tcntaculitcs gyracanthus, and Calymmene camera ta. The holotype 

 was found by Mr. Joseph Gambino, foreman in the quarries. 



Cat. number 35,064, U. S. N. M. 



Stanrocystis Haeckel 



Pseud ocrinites Forbes (partim), Mem. Geol. Surv. Great Britain, 11, pt. 



11, 1848, p. 498, pi. xiii, figs. 1-13. 

 Stanrocystis Haeckel, Die Amphorideen und Cystoideen, Beitr. Morph. 

 u. Phyl. d. Echinodermen, Leipzig, 1896, p. 134.— Jaekel, Stammes- 

 geschichte der Pelmatozoen, Berlin, 1, 1899, p. 285. 

 Lepadocrinus Bather (partim), Treatise on Zoology, in, Echinoderma, 

 London, 1900, p. 61. 

 Haeckel's definition, translated, is as follows: " Callocystida with 

 4 simple, equal ambulacra, which form a regular rectangular cross, 

 and extend along the 4 edges of the theca to the column. Theca 

 4-sided prismatic, and quadrate in transverse section. Three pectini- 

 rhombs (3 paired adanals and an unpaired baso- frontal)." 

 Genotype, Pseudocrinites quadrifasciatus Pearce. 

 This definition does not point out any essential characters of the 

 genus further than that it has 4 ambulacra. As other genera of this 

 family have the same number, the genotype must furnish the detailed 

 generic characters. 



Jaekel's definition, translated, reads as follows : " Theca oval, with 

 4 ambulacra having numerous crowded brachioles. Anal area small, 

 between plates 7, 8, 13, and 14; one basal and 2 upper pectinirhombs 



