MUSEUM OF COMPARATIVE ZOOLOGY. 1 el LVE 
The disk in several instances was removed from its connection with 
the arms, and the five remaining connected arms lived for three days after 
the mutilation. 
I had some difficulty in identifying the adult Amplnura, from the fact 
that in some of the best descriptions of A. sgwamata the color of the live 
animal is not given, while in others it is recorded as white.* None of the 
adults of A. sguamata studied were white, but all were brown or choco- 
late colored when alive. Variation of color is great among specimens of 
the same genus, and in some localities this species may be white; but 
the specimens which were studied were not white. 
II. THE BILATERALLY SYMMETRICAL LARVA. 
August Krohn ft and Max Schultze t{ first found out that Amphiura 
(Ophiolepis) squamata, Sars, is viviparous; and that discovery has been 
established without possibility of doubt by Sars,§ Lyman,|| Metschni- 
koff, Apostolides,** Ludwig,tf and others. Its viviparous life falls into 
the following divisions: (1) The development of the bilateral larva ; 
* Packard states (Zodlogy, p. 111): ‘*.4. sgwamata, Sars, has long slender arms 
and is white.” In Agassiz’s ‘‘Sea-Side Studies,” p. 115, ‘A, squamata is spoken of 
as the ‘‘ white Amphiura.” 
The adults were identified by comparison with specimens in the Museum of Comp. 
Zoology identified by Mr. Lyman, and by reference to published descriptions. Prof. 
Verrill has also examined my specimens of the adults, and verifies my identification. 
+ Ueber die Entwickelung einer lebendig gebiirenden Ophiure, Arch. f. Anat. 
Physiol. u. Wiss. Med., 1851. Krohn first showed that Amphiura (Ophiolepis) 
squamata is viviparous. 
The first naturalist to describe the young of Amphiura (Ophiolepis) squamata was 
Joh. Miller (Arch. f. Anat. Physiol. wu. Wiss. Med., 1851, p. 1 et seq.). He errone- 
ously ascribed to Ophiolepis in this place a pluteus form. Following Krohn’s paper 
(op. cit., p. 353), where Ophiolepis (Amphiura) squamata is shown to be viviparous, 
it is acknowledged that the young described by Miiller is of some other Ophiuran, 
and not Ophiolepis syuamata. 
£ Ueber die Entwickelung von Ophiolepis squamata, einer lebendig gebirenden 
Ophiure, Arch. f. Anat. Physiol. u. Wiss. Med., 1852. 
§ Jahresbericht of Leuckart, 1865, p. 86. 
|| Ophiuride and Astrophytide, 72. Cat. Mus. Comp. Zoil., No, 1. 
I Op. cit., p. 13. 
** Op. cit. 
+t Zur Entwickelungsgeschichte des Ophiurenskelettes, Zeit. f.. Wiss. Zoil., 
XXXVI. 
