105 



neither with T. Woods, who suggests that A. griseus and pallidus may be only varieties 

 of A. ovum^). However, I am not sure that it is really A. pallidus. In „Voyage de 

 la Frégate Venus." Atlas de Zoologie. Zoophytes. PI. II. Fig. 1 is figured the test 

 of an A. pallidus, which is rather low, like an Echinus, not egg-shaped as in 

 the above mentioned specimen. Also a spine is figured; it is not clubshaped, but 

 tapering. If this form be the true A. pallidus, the specimen described above must 

 be a new species. I cannot settle Ibis question for the present, and thus, of course, 

 shall not add to the confusion of the Amblypueustes-species by giving a new name 

 to this form. Till the contrary be proved I must regard it as A. pallidus. 



Amblypneustes griseus (Blv.). This species is easily distinguished by the 

 somewhat depressed test. The pedicellarise are like those of formosus; the spines 

 are clubshaped, both primary and secondary ones. In large specimens of this 

 species there may be a little irregularity in the occurrence of the primary ambu- 

 lacral tubercles; no confusion with Holopneustes should, however, take place, the 

 regular trigeminate arcs of pores showing sufficient difference from the irregular 

 arrangement of the pores in that genus. — The notes on this species given by Bell 

 (On the genera and species of Temnopleuridæ. p. 436) arc not reliable. Of the eleven 

 specimens mentioned there I find 7 lo be Holopneustes, 3 probably A. ovum and only 

 one A. griseus. A similar result I found concerning A. ovum (comp, above, p. 104), and 

 what is named A. pallidus in that paper is likewise not that species alone. Upon the 

 whole it is scarcely possible for the present to distinguish these species by the naked 

 tests alone; that it will prove a possible thing to do so with certainty, when once 

 examinations have been made on sufficient fresh material, seems not improbable. 



Amblypneustes grossularia Studer. (The type-specimen examined in the Ber- 

 lin-Museum). The globiferous pedicellariæ are larger than those of the other species 

 of this genus; also the form of the valves is somewhat different (PI. VI. Fig. 33), 

 but as usual there is one unpaired lateral tooth. The ophicephalous pedicellariæ 

 (PI. VII. Fig. 52) are narrowed in the middle, differing thus rather markedly from 

 those of the other species. The triphyllous pedicellariæ (PI. VI. Fig. 21) have the 

 blade much widened, whereas in all the other species of Amblypneustes (and Holo- 

 pneustes) the blade is narrow (comp, the figure given for A. formosus, PI. VII. 

 Fig. 13). Spicules as in the other species. The secondary spines are a little swollen 

 at the point and without central thorn; how the primary spines end I cannot say, 

 having seen only broken ones. — Studer says in his description of this species^): 

 „die Spinen sind klein und spitz, ähnlich wie bei Salenia"" ; this must be a Japsus 

 calami for Salmacis; they are not in the least similar to those of Salenia. The 

 statement of Studer that there are 4 pairs of pores to each compound ambulacral 

 plate is wrong; there are really only three. — That this species is not the young 



') On the habits of some Australian Ecliini. Proc. Linn. Soc. N. S. Wales. V. 1881. p. 193. 

 ') Ubersiclit über die währenil iler Heise S. M. S. Gazelle f>es. Keliinnidea. Monatsber. Akail. Berlin. 

 1880. p. 873. 



I) K n Videiisk SeIsU. Ski-., 7. H:i.|iU<-, niiliiiviiliMisk. uj; miitlu-iii. Afil. I. 1. 14 



