LOVENIA. 251 



valves .60 mm. long, the base. 25 mm. wide and about the same in height, 

 and the rather flat blade more than .15 mm. at the middle where it is widest; 

 and slender ones with the valves .30-1.00 mm. long and the blade very narrow; 

 in a valve .95 mm. long, the base is more than .25 mm. high but is less than .20 

 mm. wide, while the blade, about .70 mm. long and only .06 mm. wide, is much 

 compressed (about .06 mm. deep) and has finely serrate margins; the apophysis 

 is very conspicuous, some .20 mm. deep. Triphyllous pedicellariae are appar- 

 ently rare; the valves are distinctly longer than wide but only measure .10 mm. 

 in length. 



Breynia vredenburgi. 



Anderson, 1907. Journ. and Proc. Asiatic Soc. Bengal, (2), 3, p. 145. 



So far as the limited material admits of an opinion, this seems to be a 

 well-marked species, which is as yet known only from Port Blair, Andaman 

 Islands. The shape, as well as the dorsal tuberculation of the test, is very 

 different from that of any example of B. australasiae which I have seen. 



Lovenia. 



Agassiz and Desor, 1847. Ann. Sci. Nat. Zool., (3), 8, p. 11. 

 Type, Lovenia hystrix Agassiz and Desor, 1847 = Spatangus elongatus Gray, 1845. Eyre Voy. 1, p. 436. 



This is a genus of notable spatangoids of moderate or large size, with long 

 and very conspicuous dorsal primary spines. These spines are placed on 

 tubercles which are so deeply sunken in the test that they give rise to more or 

 less overlapping, swollen rings on the interior surface of the test. Such internal 

 swellings are indicated in large specimens of Homolampas, as well as in Maretia 

 and some other genera, but in no genus (except Pseudolovenia) are they so 

 striking as in Lovenia. The possibility of a relationship between Homolampas 

 and Lovenia must not be overlooked and there can be little doubt that they 

 are more nearly related than the classification here used would seem to indicate. 

 The pedicellariae in Lovenia are abundant and very diversified; ophicephalous 

 have only been found in one species, and the same is true of one form of globi- 

 ferous, but all other forms are of general occurrence. The most characteristic 

 form is that called globiferous (p. 242) and which is known also in Maretia, 

 Gonimaretia, and Pseudomaretia. These occur only on the bare ventral ambu- 

 lacra and in dry specimens are so easily knocked off that they often seem to be 



