210 VOGTIA SPINOSA. 



for his H. ungulata. So far as the outUne of the basoventral margin is 

 concerned ■ there is very Uttle variation in the form of the older nectophores 

 except such as is due to violent contraction. With regard to the coloration of 

 this species I may note that while most of the specimens were entirely colorless 

 except for the yellow tentilla, the nectophores in the two examples from Station 

 4707 were pale emerald-green, the tentacles bright yellow, and the siphons a 

 brilliant carmine. This color difference, certainly not of any systematic value 

 since the brilliant specimens were anatomically indistinguishable from the 

 others, is probably the external indication of different physiological states, 

 perhaps of nutrition. 



So far as I can learn, Hippopodius has only once been recorded from the 

 Indo-Pacific region (Lens and Van Riemsdijk). The present captures show that 

 it is generally distributed over the Eastern Tropical Pacific. 



VOGTIA KoLLiKER, 1853. 



At most only two species of Vogtia can be recognized, V. pentacantha 

 Kolliker, and V. spinosa Keferstein and Ehlers ( = V. kollikeri Haeckel) ; neither 

 of which has been thoroughly studied. Indeed the latter is known from detached 

 nectophores only. Fortunately the "Albatross" collection contains a well- 

 preserved series which agree so closely with the figures of V. spinosa by 

 Keferstein and Ehlers and Haeckel, that I have no hesitation in uniting them. 

 The question whether spinosa is actually distinct from pentacantha, with which 

 it is united by Schneider, is still an open one. The evidence afforded by the 

 single specimen of the latter which I have had the opportunity to study (:11b, 

 p. 35), together with the various figures of it which have been published (Kolliker, 

 '53, KefTerstein and Ehlers, '61, Chun, '97b), seem to show that the differences 

 in the form of the nectophores, and especially in the location of the gelatinous 

 spines, are sufficient to separate the two species. However, a final decision is 

 impossible until the constancy of the two characters in question has been tested 

 on a considerable series of pentacantha. 



The union of Haeckel's V. kollikeri with spinosa, proposed by Chun ('97b, 

 p. 35) is undoubtedly necessary. 



Vogtia spinosa Keferstein and Ehlers. 

 Plate 15, fig. 5-12. 



Voglia spinosa Keferstein and Ehlers, '61, p. 24, pi. 5, fig. 16; Haeckel, '88b, p. 364; Chun, '97b, 



p. 103. 

 Vogtia kollikeri Haeckel, '88b, p. 182, pi. 29, fig. 9-14. 



