36 ART. 1. — CHARLES ELIOT : 



but bearing lamina? and on one side a strong thick ridge. The 

 liver is brownish and consists of seven masses, each composed of 

 several irregularly shaped balls. Two of these masses are com- 

 pletely enclosed by the hermaphrodite gland and two project 

 from it. The hermaphrodite gland is composed of 14 packets, 12 

 on the left side of the liver and two on the right. These packets 

 are made up of smaller globnles. The vas deferens is very 

 strong and muscular. It issues from a roundish yellow mass 

 consisting of many lobes. The penis is broad (.10 mm.) and 

 sharply bent at the end into an acute point, which is almost at 

 right angles with the base. The female branch is little develop- 

 ed. The spermatotheca was found empty; the mucus and albu- 

 men glands are small. The fan- shaped organ described by Bergh 

 for some species of Melibe was not found. The vagina dilates 

 into a large pouch before entering the vestibulum genitale. The 

 yellowish central nervous system lies in a semitransparent cap- 

 sule from which it was. with difficulty separated. It is markedly 

 granular but consists of six clearly distinguishable masses, 

 representing three pairs of ganglia. The buccal ganglia were not 

 found. The salivary glands are represented by small, flocculent 

 bands. 



I register this form as a new species characterized by the 

 following features : (a) a broad foot, (b) the presence of large 

 arborescent appendages on the back, (c) a rather compact brown 

 liver, (d) a broad penis, (e) black stomach plates, (f) the two divi- 

 sions of the stomach are remarkably distinct. But in view of its 

 great size (15 centimetres or more) it is possible that it may 

 on] y be an unusually developed individual of some species known 

 by smaller specimens. 



Characteristics (a) and (b) approximate it to Tebhys, but the 

 creeping surface, though very broad, is a groove, not a flat sole, 

 and the arborescent appendages are scattered over the back, not 

 arranged symmetrically as branchial. 



