Note 3 — Chapter VI · STRUCTURE OF THE HEART IN THE EDRIOPHTHALMA.
W. S. (William Sweetland) Dallas translation
I find, in Milne-Edwards’ ‘Leçons sur la Physiol. et l’Anat. comp.’ 3 page 197, the statement that, according to Frey and Leuckart, the heart of Caprella linearis possesses five pairs of fissures. I have examined perfectly transparent young Caprellæ (probably the young of Caprella attenuata, Dana, with which they occurred), but can only find the usual three pairs.