1893.] Zoology. ; 477 
ZOOLOGY. 
The New England species of Balanoglossus.—In 1873, 
Alex. Agassiz described a Tornaria from New England which he 
ascribed to the common Balanoglossus of the region. Bateson later, 
studying in Virginia and North Carolina, showed that in B. kowalevskii 
there is a direct development. The question at once arose, what form 
did Agassiz have? Either his Tornaria did not belong to B. kowalev- 
skii or the same species has a different development in different regions. 
Now Prof. T. H. Morgan announces’ that he has found Bateson’s larvee 
with the Balanoglossus kowalevskii on the southern coast of New Eng- 
land. This clears up one problem but it still leaves the origin of the 
Tornaria questionable. 
Marsipobranchs.—Beard reports’ that in young Myxines in which 
the pronephros was functional, the teeth were present in several rows 
upon the roof of the mouth. Apparently there is no Ammocete stage, 
but there is a metamorphosis. He further finds that at least in one 
specimen of a male Petromyzon in about one section in forty of the 
testis there was a welljmarked ovum, occupying a follicle for itself. 
The Lateral Line of Siluroids.—Pollard has been tracing the 
cephalic divisions of the lateral line system in several Siluroids’ and 
while his work is largely descriptive and admits of no abstract, one is 
struck with the support he brings to the old view of Huxley that the 
Arthrodira are near relatives of the Siluroids and especially to the 
close affinities of Clarias and Coccosteus. The parallels in the canals 
of the two forms are very exact. Oñ the other hand Pollard points out 
a close resemblance between the African genera Clarias and Auchen- 
aspis and the South}American, Chetostomus. The facts remains, that 
while careful studies of the lateral line like these of Pollard may in 
future throw much light upon the phylogeny of various groups of fish- 
like forms, we have as yet not data enough for much generalization. 
Prodromus of a new System of the non-venomous Snakes. 
—The unsatisfactory character of the existing classifications of the 
1 Zool. Anz. XV, 456, 1892. 
? Anat. Auz. VIII, p. 59, 1892. 
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