184 THE BERMUDA ISLANDS. 



Cuba, Jamaica. 



Truncatella subcylindrica, Gray. 



Cuba, St. Thomas, Porto Rico. 



? Truncatella pulchella, Pfr. 



Cuba, St. Thomas, Porto Rico. 



Helicina convexa, Pfr. 



Onchidium trans- Atlanticum, n. sp. 



NEW SPECIES OF MOLLTJSCA. 

 Octopus chromatus. (PL 15, fig. 1.) 



Body spheroidal, somewhat acuminate behind, and im- 

 pressed, but not furrowed, ventrally ; mantle opening extend- 

 ing about one-half around the circumference of the body, and 

 terminating some distance below and back of the eyes. The 

 head not much narrower than the body; eyes not conspicuous, 

 with a wart above each ; funnel largely free, reaching about 

 half way to the base of the web, which is about as long as the 

 body and head combined. 



Arms longest as 1. 3. 2. 4, although possibly the second pair 

 outmeasured the third pair previous to contraction ; slender, 

 very tapering, and exceedingly attenuated toward the apex 

 suckers fairly large, closely placed, and in regular zigzag alter- 

 nation from the base, contracting with a quadrangular outline. 



Body granulated posteriorly, and to a less extent in the re- 

 gion of the neck. Color milky, closely blotched or speckled 

 with ochre, giving a yellowish appearance, and sprinkled with 

 brown. 



Length of specimen about nine or ten inches. 



The only form with which I can closely compare this species 

 is the Octopus Bermudensis of Hoyle (Challenger Reports, 

 Zoology, XVI, p. 94, PL II, fig. 5). which is described from a 

 single young specimen, measuring, including the arms, not 

 more than two and a-half or three inches. It differs from 

 this form in the extremely tapering and attenuated arms, 

 their relative lengths (1. 3. 2, 4 instead 1. 2, 3. 4), and in the 



