20 AGASSIZIA SCROBICULATA. 



the earlier stages known of other Spatangoids, when the test is more or 

 less cylindrical. Quite a good series of specimens of Agassizia was dredged 

 at Barbadoes, and in Lat. 37°, South ; Long. 56°, West. The smallest speci- 

 mens were nearly as small as the presumed Agassizia of PL XIV., but 

 agreed so entirely, except in size, Avith the larger specimens of Agassizia 

 figured on PI. XU.f. 23, 24, Eev. Ech., that I am convinced the figure of the 

 presumed Agassizia {PL XIV. f. 9- 12) is the young of some unknown 

 Spatangoid. 



In the smallest specimen the course of the fascioles was identical Avith 

 that of the older specimens ; the outline of the test from above and in pro- 

 file did not dilTer materially from that of the larger specimens ; the test was 

 somewhat less gibbous, and the posterior lateral ambulacra shorter, scarcely 

 a quarter the length of the lateral anterior ambulacra. As in young Bris- 

 sopsis the suckers of the odd ambulacrum, within the fascicle, early attain a 

 very large size 



Off Barb.iiloes, 100 fathoms. Lat. 37° 42', South ; Long. 56° 20', West. 44 fathoms. 



Agassizia scrobiculata 



! Agassizia scrobiculata Val., 1846, Voyage Vunus. 



Fragments of this species from Juan Fernandez in 220 fathoms. From the 

 same spot imperfect specimens of a species of Brissopsis, remarkable for its 

 elongated, narrow anal fascicle, which is very distinct and continuous from 

 the subanal plastron to the peripetalous fiisciole, thus differing strikingly 

 from the anal flisciole of Brissopsis lyrifera. 



Hemiaster Philippii 



!.l/A('»vPliilippii LoviSx MS. . 



1 Hemiaster PliiUppii A. Ag., 1873, Bull. M C. Z., lU. No. 8, p. 189. 



PLIV.f.i-S. 



I owe to Professor Loven a specimen of this species, collected by Kinberg 

 off La Plata. It was not included in the Synonymy of the Eevision, thinking 

 Profe.s.scr Loven would soon describe it with other material he had in hand 

 at the time of my visit to Stockholm. Although Loven only possessed a ^k^w 

 quite young specimens, intermediate between the stages of PL IV. f. 7, s, 

 yet, with his usual acumen, he correctly distinguished this species from its 

 close ally, Hemiaster australis. 



A remarkably fine series of Hemiaster Philippii was collected by the 



