no SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



Shape. — Large, 65 mm. long, very elongate, narrow, highly inflated 

 with steep sides, posterior margin projecting slightly ; adoral surface 

 deeply depressed around peristome. 



Apical system. — Slightly anterior, monobasal, four genital pores. 



Ambulacra. — Petals broad, open, extending two-thirds distance 

 from apical system to margin ; poriferous zones unequal with 7 more 

 pore pairs in posterior poriferous zones of petals II and IV, 14 more 

 in anterior zones of petals I and V, distal portion of petal III not 

 clear; poriferous zones very narrow; pores conjugate, each pore 

 slightly elongated transversely. 



Periproct. — Inframarginal, slightly wider than high. 



Peristome. — Anterior, pentagonal, wider than high, deeply de- 

 pressed. 



Floscelle. — Bourrelets well developed, vertical walled, curving con- 

 vexly into peristome ; phyllodes single pored (text fig. 94) with few 

 pores arranged in two series in each half -ambulacrum : six to eight 

 in each outer series, two in each inner. Buccal pores present. 



Occurrence. — Middle Eocene, Hastingues (Landes), France. 



Location of type specimen. — At the Sorbonne, according to Cotteau. 



Remarks. — I have not seen Cotteau's type specimens of E. raulini, 

 but have studied a specimen identified as E. raulini by Castex (1930, 

 p. 31). This specimen is from the same locality as Cotteau's types 

 and is similar in most of its features to Cotteau's figures of ii. raulini. 

 However, its petals are shorter, and its test is narrower. These 

 dififerences may reflect inaccuracy on the part of Cotteau's artist, or 

 may be real. Regardless, this specimen is certainly congeneric with 

 Cotteau's specimens. 



Craterolampas is so similar to Echinolampas that it is herein con- 

 sidered a junior subjective synonym. In both genera, the petals are 

 open, with narrow, unequal poriferous zones ; the peristome is pen- 

 tagonal, with well-developed bourrelets and single-pored phyllodes 

 with buccal pores ; and the test is large and often highly inflated. 

 E. raulini differs from most species of Echinolampas in having its 

 peristome depressed, and in having a periproct only slightly wider 

 than high. Cotteau distinguished it further on the grounds that its 

 peristome was rounded and not pentagonal. I suspect that his speci- 

 mens did not show the peristome clearly, as this portion of the test 

 is not clearly drawn in his figures. It is definitely pentagonal in 

 Castex's specimen. 



Cotteau considered E. raulini closely related to Conoclypus and 

 concluded that until it was known whether or not jaws occurred in 



