SYSTEMATIC DESCRIPTIONS — SPATANGINA. 77 



are shorter, measuring 10 mm. in length. The periproct is quite wanting, 

 as the specimen is broken away posteriorly. 



Cotteau says that this species is very rare and mentions only the Cleve 

 collection. There is only one specimen in Washington, and it agrees so 

 closely with Cotteau's figures, it is undoubtedly the one from which the 

 drawings were made, although it does not show all the details there 

 depicted. This species is certainly very close to P. loveni, but it seems 

 that Cotteau's distinctions are well taken, as clevei is narrower, more 

 swollen, and especially has the posterior ambulacra I and V longer and 

 deeper than in loveni. 



Oligocene, Anguilla formation, island of Anguilla, Guppy collection 

 ex Cleve, 1 specimen, holotype, U. S. Nat. Mus. No. 115408. Antigua 

 formation, Willoughby Bay, Montpelier, St. Phillips, Antigua, Dr. A. P. 

 Brown collector, 1 specimen, Philadelphia Academy of Natural Sciences, 

 No. 1663. 



Paraster loveni (Cotteau). 

 (Plate 13, Figures 6 to 9.) 



Schizasler scillce Guppy (mob Agassiz), 1866, Quart. Jour. Geol. Soc. London, vol. 22, p. 301. 

 Schizaster loveni Cotteau, 1875, Kongl. Sven. Vet. Akad. Handl., vol. 13, No. 6, p. 29, plate 5, 

 figs. 9 to 13. Guppy, 1882, Scientific Assoc. Trinidad, Proc., part 12, p. 197. 



The following is an extract from the original description of this species: 

 Species good-sized, subcordiform, expanded anteriorly, and subcarinate 

 posteriorly. Upper face thick, moderately swollen, obliquely inclined 

 anteriorly and posteriorly; marked posteriorly by a very attenuated carina. 

 Posterior face subvertically truncate; lower face nearly flat, rounded to- 

 ward the ambitus; a little swollen in the middle, depressed in front of the 

 mouth. Apical disk subcentral, slightly posterior. Anterior furrow wide, 

 deep, subcarinate on the sides, attenuated towards the ambitus, prolonged 

 as far as the peristome. Anterior ambulacrum III straighter and longer 

 than the others, having its poriferous areas much narrower than the interval 

 which separates them. The paired ambulacra are deeply excavated, very 

 unequal, the anterior pair II and IV subflexuous, divergent; the posterior 

 pair I and V are much shorter, rounded at the tips, having the poriferous 

 areas wider than the space which separates them. Peristome transverse, 

 labiate, near the anterior border. Periproct elliptical, opening at the 

 summit of the posterior face. Peripetalous fasciole very sinuous. 



In the U. S. National Museum there are 5 specimens of this species, 

 one large and the rest small. The large one measures 26 mm. in height, 

 43 mm. in length, and 41 mm. in width. A smaller specimen, very per- 

 fectly preserved, especially ventrally, measures 18 mm. in height, 28.5 

 mm. in length, and 26 mm. in width. Guppy, in 1882, says that the 

 specimens from Anguilla which he, in 1866, referred to Schizaster scillce, 

 are the same as Cotteau's loveni. The anterior ambulacrum III lies in a 

 deep furrow which is somewhat wider than in clevei; the anterior pair 

 II and IV are in shallower and more open depressions than in clevei and 

 measure 13 mm. in length. The posterior ambulacra I and V, also in 

 relatively shallow depressions, measure 8 mm. in length. Cotteau com- 

 pares loveni closely with parkinsoni, but I have not seen that species. 



