COLLINGE : SANDWICH ISLAND SLUGS. 47 



The slug here described as Afiriolimax glohosus is not unlike that 

 imperfectly characterized by Eydoux and Souleyet in 1852, but it has 

 no specialized shell such as they detail and figure; on the contrary, 

 there were in the three specimens dissected only loose, minute, calcareous 

 discs. Unless other material be forthcoming, I fear that the Agr. 

 Sandioichiensis, Eyd. and 8oul., will have to remain a very doubtful 

 species, for at present we know of no species of Agriolimax or Amalia 

 that possesses a shell at all approaching the one figured by Eydoux and 

 Souleyet, and reproduced by Tryon (14), pi. liv, figs. 71-3. It is 

 quite distinct from any of the known genera of Limacidoe, and that, 

 1 agree with Tryon, is in itself sufficient to justify the constitution of 

 a new genus. 



1. Agriolimax globosxjs, n.sp. 



Animal, head, mantle, and dorsum of a bluish-grey colour ; sides of 

 the body a light yellowish-brown. Posterior portion of the body 

 attenuated, pointed, and keeled. Mantle large, pointed in front. 

 Foot-sole and foot-fringe yellow. Lateral rugae arranged obliquely. 

 Shell consists of a series of loose, minute, calcareous discs. Length 

 (in alcohol) 15-18 ram., mantle 5-75-7 mm. 



Hah. — Manna Loa, Hawaii. 



Anatomy. — There are four convolutions in the intestine, and the 

 right lobe of the liver forms the apical portion of the visceral mass. 

 The generative organs are very distinct from those of the other 

 species of the genus, the nearest ally being Agr. tennellm, Miss. The 

 free oviduct is a long wide tube, and opens into a much convoluted 

 sac-like oviduct. There is no distinction between the upper and 

 lower portion of the free oviduct as in L. tetmellus, Miss. The penis 

 is a wide short tube, terminating in a bulbous head, to which the 

 retractor muscle is attached ; this muscle, unlike that of L. tennellus, 

 is short and broad. From the side of the penis (Fig. I), the vas 

 deferens passes off, leading into a wide tube, the prostatic portion 

 of the common duct. There is a small bilobed flagellum (Fig. I,Jl.), 

 passing off from the posterior portion of the penis. In Z. tennellus 

 there is little or no flagellum. The receptaculum seminis is an 

 irregularly shaped sac with a short duct, which opens some little 

 distance behind the penis ; in this particular it difi^ers from any other 

 species of the genus, so far as I am aware. The albumen gland is 

 small. The hermaphrodite gland (Fig. I, hgl.) is single, and opens 

 into the common duct by a short hermaphrodite duct. 



2. Agriolimax Perkinsi, n.sp. 



Animal, ground colour light-brown, dorsum, also head and posterior 

 portion of the mantle, darker ; sulci black, lighter towards foot- 

 fringe ; foot-sole and foot-fringe yellowish-brown. Mantle long and 

 attenuated. Lateral rugne arranged obliquely. Shell absent. Length 

 (in alcohol) 18-21 mm. 



i7?/5.— Lanai, 2000 feet. 



Anatomg. — The free oviduct is an unusually long and wide tube, 

 showing a series of constrictions, into the first of which the somewhat 



