HuTTON. — On some new Species of Aplysia. 279 



AnT. XXXIX. — BescrijJtion of two new Species of Aplysia. 



By Captain F. W. Huttox, C.M.Z.S. 



Plate XXI. 



[Bead before the Otago Institute, I4:th September, 1874.] 



Aplysia hrunnea, sp. nov. 

 Animal of a uniform rich dark brown, about 4 inches in length. Shell horny, 

 ear-shaped, firm, the whole shell very finely concentrically striated ; epidermis 

 pale brown. 



Length, '9 in. j breath, '7 in. 



Habitat — Wellington and Dunedin. 



The shell somewhat resembles that of A. excavata, Sow., from Port 

 Jackson, but it is not square at the end. 



Aplysia venosa, sp. nov. 



Animal yellowish-brown, veined with dark brown, about 6 inches in 

 length. Shell membranous ; the apex rather coarsely concentrically striated, 

 the rest of the shell smooth and polished j epidermis pale straw colour. 



Length, 1*25 j. breadth, 1 inch. 



Habitat — "Wellington. 



Art. XL. — Descrip)tion of two new Species of Crustacea from New Zealand. 



By Captain F. W. Hutton, C.M.Z.S. 

 \Read before the Otago Institute, 12th October, 1874.] 



Sesarma pentagona. 

 Carapace subquadrate, smooth, broader than long ; anterior lateral margin 

 with two teeth ; front nearly vertical with four rounded projections ; lateral 

 regions obliquely striated ; a pentagonal mark in the centre, the apex 

 prolonged to the front, which it divides. Area on each side of the mouth 

 below with moniliform transverse striae. Arms trigonal, striated on the 

 outside j hands smooth outside, and with a few scattered granules inside ; 

 fingers smooth. Legs with the third joint very broad, compressed, acute 

 above, and armed with a single tooth at the apex, smooth ; outer joints and 

 claws tomentose. 



Length, -67 inch; ratio of length to^breadth, 1/1*27. 



A single specimen in the Colonial Museum, Wellington. 



Locality not stated. 



PaLINURUS EDWARDS II. 



Male. — Carapace beaked, armed with spines and large oval depressed 

 tubercles separated by rows of short hairs. Beak small, compressed^ curved 



