1863.] MR. J. Y. JOHNSON ON A NEW MACRUROUS DECAPOD. 255 



the upper jaw, auJ some black oblong spots on the lower side of the 

 ear and temple, which may be more distinct in the living specimen. 



Hab. Unknown ; perhaps China. 



This species in several respects agrees in form and appearance with 

 Emys c/iinetisis, of which, as is shown by the specimen brought by 

 Mr. Swinhoe to this country, the Tortoise described by me as Emys 

 bennetti is only the adult. It is at once known from E. chinensis 

 by the minutely speckled body and the bands on the head, and by 

 the under surface of the marginal shield being destitute of any rings 

 or spots. The head and neck of E. chmensis are covered with uni- 

 form narrow black lines, which on the chin and throat form circles. 

 E. chinensis, like E. bealei, is a true Emys, with slender, distinctly 

 developed toes and fingers, which are united by a web to the claw, — 

 E. chinensis having moderate-sized thick scales in the front of the 

 fore legs, with some larger and broader scales, or small shields, scat- 

 tered among them, and E. bealei small granular scales on the legs, 

 with three or four broad, thin, lunate, band-like shields across the 

 front of the fore legs. 



In the black speck on the neck and body, and the ornamental 

 lines on the head, this species has some affinity to E. pulcherrima, 

 described and figured in my Catalogue from a very young specimen, 

 said to come from Mexico. But this habitat is doubtful, as some 

 other animals, procured from the same person and said to be from the 

 same habitat, have proved to be from other countries. This species 

 also, as far as can be judged from the dry state of the specimen, may 

 probably be a Geoclemys. 



6. Description of a New Species of Macrurous Decapod 

 Crustacean belonging to the Genus Pen^us, from 

 THE Coast of Portugal. By James Yate Johnson, 

 Corr. Mem. Z. S. 



Pen^us bocagei, sp. n. 



The subcylindrical carapace is less than half the length of the ab- 

 domen, including the caudal segment, and is excavated at the middle 

 of the posterior margin. A median crest commences near the poste- 

 rior margin, and projects in front as the rostrum, which is more than 

 half the length of the carapace. This rostrum extends much beyond 

 the eyes, but not quite so far as the distal extremity of the peduncle 

 of the superior antennae. It has a slight sigmoid flexure, is com- 

 pressed, and is marked at each side with two low crests and two 

 grooves. Its lower edge is simple ; but its upper edge carries eight 

 small teeth, the first of which is over its base, and the last some little 

 distance from its anterior extremity. There is a fringe of hair at 

 the lower edge posteriorly. The median crest of the carapace carries 

 a single tooth, which is distant from the anterior margin about one- 

 third of the length of the carapace. At each side of the carapace, a 

 little in front of this tooth, there is a large tooth or small spine, in 



