THE SYNAPTAS OF THE NEW ENGLAND COAST. 
31 
CONCLUSIONS. 
For the sake of clearness and conciseness the results of these investigations may 
be summarized as follows: 
1. The common white synapta of the New England coast is S. inhcerens (O. F. 
Mull.). 8. girardii Pourt. and 8. tenuis Ayres are synonyms of that species. 
2. Verrill’s genus Leptosijnapta can not stand. 
3. There is a second species of synapta found in suitable places along the New 
England coast easily recognized by its reddish color, 8. roseola Ver. 
4. 8. roseola Ver. differs constantly from 8. inhcerens in the calcareous ring, the 
deposits in the tentacles and longitudinal muscles, and in the large ciliated funnels. 
5. There are no important differences between the anchors or the plates of the 
two species. 
6. The anchors are of real use to the animal in moving in its burrow, and those 
at the posterior end are most so. Accordingly we find they are there longer, larger, 
and more abundant. 
7. The so-called otocysts are not auditory but are undoubtedly positional organs. 
8. They never contain but a single otolith. 
9. The sensory cups on the tentacles are seemingly olfactory organs.- 
10. The ciliated funnels are large and complex lymphstomata and may properly be 
called excretory organs. 
11. Regeneration takes place readily and rapidly in synaptas where the mouth 
and part of the adjacent digestive tract are left intact. 
Amherst College, 
Amherst , Mass., October , 1898. 
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Bost. Soc. of Nat. Hist., vol. v, No. 3. 
Cuenot (’91). Ltudes morphologiques sur les Echinodermes. Arch, de Biol., vol. xi. 
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1889-92. 
(’98). Einige Bemerkungen fiber die Mittelmeerischen Synapta-Arten. Zool. Anz., No. 549. 
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Selenka (’67). Beitriige zur Anatoime nnd Systematik der Holothurien. Zeit. f. wiss. Zool., vol. xvii. 
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(’88). Die Entwickelnng der Synapta digitata, etc. Jena. Zeit. f. Naturw., Bd. xxn. 
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(’74). Report on the Invertebrate Animals of Vineyard Sound. Washington, 1874. 
