On Two neto Species of Macroscclidcs. 67 



alcohol 5 millim. — Externally the slug somewhat resembles 

 certain young forms of ^l. cmpin'corum, For., and forms of 

 .1. hortcnsis, F6v. ; its structure, however, is very different. 



Having so far only been able to obtain a single example, I 

 have deferred an examination of anything but the generative 

 organs. As soon as further specimens come to hand I will 

 describe the nervous and digestive systems, &c., which seem 

 interesting. 



There are two vestibules, an upper and a lower. The 

 lower portion of the vas deferens — the sperm-duct (" Patro- 

 nenstrecke ") — is characterized by an absence of any ring-like 

 swelling at its lower end, a feature very common in the hor- 

 tensis group of Arions. There is no differentiation between 

 the sperm-duct and the vas deferens, the one gradually 

 passing into the other. There is only a very small duct to 

 the receptaculum seminis, which is an elongated sac-like 

 body. The free oviduct is exceedingly large ; it passes from 

 the upper vestibule as a broad tube, aud at about a third of 

 its length dilates into a sac-like body, and is then continued 

 for a short distance as a tube, and opens into a pouch-like 

 portion, which makes a turn towards the upper vestibule and 

 is continued as a broad tube, which higher up becomes con- 

 stricted and passes into the oviduct proper as a fine tube. 

 Attached to the base of the pouch-like portion of the free 

 oviduct is a short broad retractor muscle. 



EXPLANATION OF PLATE V. A. 



Fif/. I. Anon elongatus. 



Fi(j. 2. Lower portion of the generative organs. 



Fiy. 3. Riigfe from dorsal surface of the body. 



Fig. 4. Portion of sole of foot, showing lateral and median planes. 



/.;). Lateral plane of foot-sole. r.m. Retractor muscle. 



l.v. Lower vestibule. r.s. Receptaculum seminis. 



m.p. Median plane of foot-sole. s.d. Sperm-duct. 



ov. Oviduct. v.d. Vas deferens. 

 pr. Prostate. 



VIII. — Descriptions of Two new Species o/ Macros celides. 

 By Oldfield Thomas. 



In attempting to determine an elephant-shrew of the genus 

 Macroscelides brought by Dr. J. W. Gregory from East 

 Africa, specimens already in the Museum of the two following 

 species have been re-examined and prove to need description: — 



5* 



