258 HAWAIIAN AND OTHER PACIFIC ECHINI. 



Lovenia triforis. 



Koehler, 1914. Ech. Indian Mus. Spat., p. 124. 



This species is based on a single specimen only 21.5 mm. long, from the 

 Gulf of Martaban, Burmah, 53 fms. It was largely bare of spines and no pedicel- 

 lariae were found, but there can be little question that it represents an otherwise 

 unknown species. The genital pores seem to be fully developed and the presence 

 of the genital glands in the corresponding interambulacra (both pore and gland 

 being absent in interradius 2) indicates that the individual was mature in spite 

 of its small size. Yet Lovenias seem to attain sexual maturity when still quite 

 small. In cordiformis, the full-grown adult of which is 70 mm. long, the 4 genital 

 pores are visible in a specimen only 11.5 mm. long and seem to be fully developed 

 in specimens 20 mm. long. In very small cordiformis, the periproctal region is 

 scarcely sunken at all and even in specimens 21 mm. long it is little depressed. 

 I am inclined to think therefore that triforis may, when large specimens are 

 found, prove to belong to that section of the genus, having a deeply sunken 

 periproct. 



Pseudolovenia. 



A. Agassiz and Clark, 1907. Bull. M. C. Z., 50, p. 255. 

 Type, Pseudolovenia hirsuta A. Agassiz and Clark, 1907, he. tit. 



The justification for this genus lies in the remarkable character of the pos- 

 terior ambulacra dorsally. While not apetaloid, there is no such distinction 

 between the petal and the rest of the ambulacrum as we find in Lovenia. The 

 anterior petals are also longer and narrower than in Lovenia but in all other 

 respects, the two genera correspond very closely. There is as yet only one 

 species of Pseudolovenia known. 



Pseudolovenia hirsuta. 



A. Agassiz and Clark, 1907. Bull. M. C. Z., 50, p. 255. 



Plates 146, figs. 32, 33; 160, figs. 8-12. 



Length 60 mm.; width at apical system where widest, 5] mm.; height 

 at apical system nearly 25 mm. The outline of the test, the depression of 

 ambulacrum III, the position of the apical system with its four genital pores 

 (in one specimen there are but three), the form of the petals and the tuberculatum 



