AGASSIZ AND CLARK: REPORT ON ECHINI. 255 



Lovenia grisea A. Ag. and Clark. 



This species is near L. gregalis Alcock, but is much more heart-shaped, flatter, 

 and decidedly narrower posteriorly. The test is densely covered with spines, and 

 the lateral ambulacra are quite different from those of gregalis. On the actinal 

 surface, the bare posterior ambulacra are not nearly so wide as in de Meijere's 

 (1904) figure of gregalis. Unfortunately the single specimen is so badly injured 

 that there is no trace of the abactinal system and internal fasciole ; the subanal 

 fasciole is also injured. There is no anterior lateral fasciole. The petals are 

 well-developed, nearly closed and pointed, with the poriferous zones almost 

 straight and scarcely sunken. The specimen is 81 mm. wide and only 26 mm. 

 high ; it must have been about 90 mm. in length. The anterior lateral ambulacra 

 are only 4 mm. wide at a distance of 15 mm. from the ambitus, but at the ambitus 

 they are 12 mm. The color is light olive gray. 



Station 4080. Off Puniawa Point, Maui, 178-202 fathoms. 



Pseudolovenia A. Ag. and Clark. 



This genus resembles Lovenia very closely when the specimens are covered 

 with spines, but when the abactinal surface is denuded the difference in the pos- 

 terior ambulacra is very striking. These ambulacra are not petaloid, the porifer- 

 ous zones are flush with the surface of the test, and, though slightly converging at 

 first, diverge towards the ambitus, the petals becoming more and more open, 

 while the pores of a pair come closer together until, below the ambitus, there are 

 only single pores. The anterior lateral ambulacra are subpetaloid with the porif- 

 erous zones flush. Pascioles, tubercles, and spines much as in Lovenia. 



Pseudolovenia hirsuta A. Ag. and Clark. 



The test is distinctly heart-shaped with an evident groove for the anterior am- 

 bulacrum. It is densely covered, especially in the young, with slender miliary 

 spines 2-4 mm. long. The abactinal system is only about one-third of the length, 

 from the anterior extremity, and is more anterior still in very young individuals. 

 The test is highest at or behind the abactinal system. The number of large pri- 

 maries increases with size ; there are 2 or 3 in each anterior interradius and from 

 3 to 8 in each lateral interradius, in specimens under 50 mm. in length. In 

 larger specimens there may be as many as 6 in front and 12 on the side. The 

 largest specimen is badly damaged at the posterior extremity, but is 54 mm. wide 

 and must have been nearly 65 mm. long ; it is a trifle over 22 mm. high. Smaller 

 specimens are relatively higher and narrower. In the best preserved specimeu, 

 which is 60 x 51 mm., the posterior ambulacra from the internal fasciole to the 

 margin measure 33 mm. ; the interporiferous area is 3 mm. wide at the fasciole, 

 2.25 mm. wide 13 mm. from the fasciole, and 5 mm. wide at the ambitus. The 

 color is gray, becoming dirty white in the largest specimen. Young specimens 

 are more nearly cream-color. The primary spines are white, and in the largest 

 specimen are from 30 to 37 mm. long. 



